"Six years after the Spectre transient execution processor design flaws were disclosed, efforts to patch the problem continue to fall short," writes the Register: Johannes Wikner and Kaveh Razavi of Swiss University ETH Zurich on Friday published details about a cross-process Spectre attack that derandomizes Address Space Layout Randomization and leaks the hash of the root password from the Set User ID (suid) process on recent Intel processors. The researchers claim they successfully conducted such an attack.... [Read their upcomong paper here.] The indirect branch predictor barrier (IBPB) was intended as a defense against Spectre v2 (CVE-2017-5715) attacks on x86 Intel and AMD chips. IBPB is designed to prevent forwarding of previously learned indirect branch target predictions for speculative execution. Evidently, the barrier wasn't implemented properly.

"We found a microcode bug in the recent Intel microarchitectures — like Golden Cove and Raptor Cove, found in the 12th, 13th and 14th generations of Intel Core processors, and the 5th and 6th generations of Xeon processors — which retains branch predictions such that they may still be used after IBPB should have invalidated them," explained Wikner. "Such post-barrier speculation allows an attacker to bypass security boundaries imposed by process contexts and virtual machines." Wikner and Razavi also managed to leak arbitrary kernel memory from an unprivileged process on AMD silicon built with its Zen 2 architecture.

Videos of the Intel and AMD attacks have been posted, with all the cinematic dynamism one might expect from command line interaction.

Intel chips — including Intel Core 12th, 13th, and 14th generation and Xeon 5th and 6th — may be vulnerable. On AMD Zen 1(+) and Zen 2 hardware, the issue potentially affects Linux users. The relevant details were disclosed in June 2024, but Intel and AMD found the problem independently. Intel fixed the issue in a microcode patch (INTEL-SA-00982) released in March, 2024. Nonetheless, some Intel hardware may not have received that microcode update. In their technical summary, Wikner and Razavi observe: "This microcode update was, however, not available in Ubuntu repositories at the time of writing this paper." It appears Ubuntu has subsequently dealt with the issue.

AMD issued its own advisory in November 2022, in security bulletin AMD-SB-1040. The firm notes that hypervisor and/or operating system vendors have work to do on their own mitigations. "Because AMD's issue was previously known and tracked under AMD-SB-1040, AMD considers the issue a software bug," the researchers explain. "We are currently working with the Linux kernel maintainers to merge our proposed software patch."
BleepingComputer adds that the ETH Zurich team "is working with Linux kernel maintainers to develop a patch for AMD processors, which will be available here when ready."

Phoronix's Michael Larabel reports: Intel and AMD have jointly announced the creation of an x86 ecosystem advisory group to bring together the two companies as well as other industry leaders -- both companies and individuals such as Linux creator Linus Torvalds. Intel and AMD are forming this x86 ecosystem advisory group to help foster collaboration and innovations around the x86 (x86_64) ISA. [...] Besides Intel amd AMD, other founding members include Broadcom, Dell, Google, HPE, HP Inc, Lenovo, Microsoft, Oracle, and Red Hat. Here are the "intended outcomes" for the group, as stated in the press release: The intended outcomes include:
- Enhancing customer choice and compatibility across hardware and software, while accelerating their ability to benefit from new, cutting-edge features.
- Simplifying architectural guidelines to enhance software consistency and standardize interfaces across x86 product offerings from Intel and AMD.
- Enabling greater and more efficient integration of new capabilities into operating systems, frameworks and applications.

AMD is launching a new chip to rival Nvidia's upcoming Blackwell chips, which Nvidia called the "world's most powerful chip" for AI when unveiled earlier this year. CNBC reports: The Instinct MI325X, as the chip is called, will start production before the end of 2024, AMD said Thursday during an event announcing the new product. If AMD's AI chips are seen by developers and cloud giants as a close substitute for Nvidia's products, it could put pricing pressure on Nvidia, which has enjoyed roughly 75% gross margins while its GPUs have been in high demand over the past year. In the past few years, Nvidia has dominated the majority of the data center GPU market, but AMD is historically in second place. Now, AMD is aiming to take share from its Silicon Valley rival or at least to capture a big chunk of the market, which it says will be worth $500 billion by 2028.

AMD didn't reveal new major cloud or internet customers for its Instinct GPUs at the event, but the company has previously disclosed that both Meta and Microsoft buy its AI GPUs and that OpenAI uses them for some applications. The company also did not disclose pricing for the Instinct MI325X, which is typically sold as part of a complete server. With the launch of the MI325X, AMD is accelerating its product schedule to release new chips on an annual schedule to better compete with Nvidia and take advantage of the boom in AI chips. The new AI chip is the successor to the MI300X, which started shipping late last year. AMD's 2025 chip will be called MI350, and its 2026 chip will be called MI400, the company said.

He's the long-time Slashdot reader who installed Linux on a 1993 PC — and then installed a 1994 version of MS-DOS on a modern Thinkpad X13. (And somewhere along the way, he even built a ChatGPT client for DOS...)

But in a new blog post, yeokm1 reveals "I recently built myself a PC," salvaging parts from a previous desktop system to bootstrap an upgrade. And "I decided to build one with the ability to still reach back into the past to run MS-DOS..."

The result? A Ryzen 5 7600 and GeForce 4060 Ti system, but with a floppy drive, optical drive, Sound Blaster card, serial, parallel and PS/2 ports — that runs MS-DOS. The fact that a 30-year-old MS-DOS 6.22 can still work well enough on such a modern hardware is testament to the efforts made by the industry to ensure good x86 PC backward compatibility. AMD, Nvidia and Asus deserve to be commended on their efforts here.

I'm also impressed that the modern Nvidia Geforce 4060 Ti still supports some legacy video BIOS modes to a usable level although this is not complete. I didn't document in this blog post but brief tests with other VESA modes and resolutions didn't work so well. I wonder how long more this amount of x86 PC backward-compatibility will continue to last though... It definitely feels like the end is near.
Their blog post includes a video about their system. (And yes, it plays Doom.) But their ultimate goal is to use it to play modern games like Cyberpunk 2077 and Flight Simulator 2020 (as well as the upcoming Flight Simulator 2024) "at reasonably good settings and performance." (And also to experiment with light machine-learning workloads, do basic video editing, run virtual machines.)

After successfully building their DOS-running system, they asked ChatGPT what it thought. Would the system's specs be powerful enough to handle the 30-year-old operation system? And ChatGPT confidently replied:

"Neither the Ryzen 5 7600 nor the GeForce RTX 4060 Ti is designed to run DOS natively. DOS is an older operating system that was primarily used on x86 architecture from the late 20th century, and modern hardware like the Ryzen 5 7600 and GeForce RTX 4060 Ti are not compatible with DOS due to their 64-bit architecture and lack of necessary drivers to interface correctly with DOS, which relied on much older technology..."

yeokm1's blog post concludes: "I think I just proved ChatGPT wrong :P"

Cerebras Systems, an AI chip startup, filed (PDF) for an IPO and plans to trade under the ticker "CBRS" on Nasdaq. CNBC reports: Cerebras competes with Nvidia, whose graphics processing units are the industry's choice for training and running AI models. Cerebras says on its website that its WSE-3 chip comes with more cores and memory than Nvidia's popular H100. It's also a physically larger chip. In addition to selling chips, Cerebras offers cloud-based services that rely on its own computing clusters. [...] In addition to Nvidia, Cerebras cites AMD, Intel, Microsoft and Google as competitors, "as well as internally developed custom application-specific integrated circuits and a variety of private companies." Taiwan Semiconductor Manufacturing Company makes the Cerebras chips. Cerebrus warned investors that any possible supply chain disruptions may hurt the company.

Cerebras was founded in 2016 and is based in Sunnyvale, California. Andrew Feldman, the startup's co-founder and CEO, sold server startup SeaMicro to AMD for $355 million in 2012. The company said in 2021 that it was valued at over $4 billion in a $250 million funding round.In May, G42 committed to purchasing $1.43 billion in orders from Cerebras before March 2025, according to the filing. G42 currently owns under 5% of Cerebras' Class A shares, and the firm has an option to purchase more depending on how much Cerebras product it buys.

AMD has released BIOS updates to boost performance and reduce latency for its Ryzen 9600X and 9700X processors. The updates come a month after disappointing Zen 5 desktop CPU reviews and coincide with Windows 11 optimizations for AMD chips. The new AGESA PI 1.2.0.2 firmware addresses high core-to-core latency issues and introduces a 105-watt cTDP option, promising up to 10% performance gains for multithreaded workloads.

The Register's Tobias Mann reports: Oracle could choose to take control of Ampere Computing, the Arm processor designer it has backed and uses in its cloud. A proxy statement [PDF] filed on Wednesday reveals that Oracle held 29 percent stake in Ampere as of May 31, 2024, and has the option to gain majority control over the chip house in 2027. "The total carrying value of our investments in Ampere, after accounting for losses under the equity method of accounting, was $1.5 billion as of May 31, 2024," the filing reads. Oracle also revealed it extended $600 million in loans in the form of convertible debt to Ampere during its 2024 fiscal year, on top of $400 million in debt given during the prior fiscal year. Ampere's debts are set to mature beginning June 2026, when Oracle will have the option of converting those investments into additional equity in the chip startup. "If either of such options is exercised by us or our co-investors, we would obtain control of Ampere and consolidate its results with our results of operations," the filing explains.

According to the document, Oracle spent roughly $48 million on Ampere processors during its 2023 fiscal year -- some of it direct with Ampere and some through a third party. By comparison, Big Red spent just $3 million on Ampere's chips and had $101.1 million worth of products available under a pre-payment order by the end of fiscal year 2024. This is despite the fact that Oracle is aggressively expanding its datacenter footprint to address growing demand for AI infrastructure. These efforts have included the deployment of massive clusters of GPUs from Nvidia and AMD with the largest campus developments nearing a gigawatt in scale. The filing also revealed that Ampere founder and CEO Renee James will not seek re-election to Oracle's board of directors.

Friday the Wall Street Journal reported Qualcomm recently "made a takeover approach" to Intel, which has a market value of roughly $90 billion ("according to people familiar with the matter...") A deal is far from certain, the people cautioned. Even if Intel is receptive, a deal of that size is all but certain to attract antitrust scrutiny, though it is also possible it could be seen as an opportunity to strengthen the U.S.'s competitive edge in chips... Both Intel and Qualcomm have become U.S. national champions of sorts as chip-making gets increasingly politicized. Intel is in line to get up to $8.5 billion of potential grants for factories in the U.S. as Chief Executive Pat Gelsinger tries to build up a business making chips on contract for outsiders...
Both Intel and Qualcomm have been "overshadowed" by Nvidia's success in powering the AI boom, the article points out.

But "To get the deal done, Qualcomm could intend to sell assets or parts of Intel to other buyers... A deal would significantly broaden Qualcomm's horizons, complementing its mobile-phone chip business with chips from Intel that are ubiquitous in personal computers and servers..." Qualcomm's approach follows a more than three-year turnaround effort at Intel under Gelsinger that has yet to bear significant fruit. For years, Intel was the biggest semiconductor company in the world by market value, but it now lags behind rivals including Qualcomm, Broadcom, Texas Instruments and AMD. In August, following a dismal quarterly report, Intel said it planned to lay off thousands of employees and pause dividend payments as part of a broad cost-saving drive. Gelsinger last month laid out a roadmap to slash costs by more than $10 billion in 2025, as the company reported a loss of $1.6 billion for the second quarter, compared with a $1.5 billion profit a year earlier...

Intel earlier this year began to report separate financial results of its manufacturing operations, which many on Wall Street saw as a prelude to a possible split of the company. Some analysts have argued Intel should be split into two, mirroring a shift in the industry toward specializing in either chip design or chip manufacturing. Splitting up immediately might not be possible, however, Bernstein Research analyst Stacy Rasgon said in a recent note. Intel's manufacturing arm is money-losing and hasn't gained strong traction with customers other than Intel itself since Gelsinger opened the factories to outside chip designers three years ago. Gelsinger has been doubling down on the company's factory ambitions, outlining spending of hundreds of billions of dollars building new plants in the U.S., Europe and Israel in recent years.

Given Intel's market value, a successful takeover of the entire company would rank as the all-time largest technology M&A deal, topping Microsoft's $69 billion acquisition of Activision Blizzard.
Intel's stock "had its biggest one-day drop in over 50 years in August after the company reported disappointing earnings," reports CNBC. Partly because of that one-day, 26% drop, Intel's shares "are down 53% this year as investors express doubts about the company's costly plans to manufacture and design chips."

But the Register remains skeptical about Qualcomm taking over Intel: Chipzilla may not be worth much to Qualcomm unless it can renegotiate the x86/x86-64 cross-licensing patent agreement between Intel and AMD, which dates back to 2009. That agreement is terminated if a change in control happens at either Intel or AMD.

While a number of the patents expired in 2021, it's our understanding that agreement is still in force and Qualcomm would be subject to change of control rules. In other words, Qualcomm wouldn't be able to produce Intel-designed x86-64 chips unless AMD gave the green light. It's also likely one of the reasons why no one bought AMD when it was dire straits; whoever took over it would have to deal with Intel.

Linux creator Linus Torvalds has released version 6.11 of the open-source operating system kernel. The new release, while not considered major by Torvalds, introduces several notable improvements for AMD hardware users and Arch Linux developers. ZDNet: This latest version introduces several enhancements, particularly for AMD hardware users, while offering broader system improvements and new capabilities. These include:
RDNA4 Graphics Support: The kernel now includes baseline support for AMD's upcoming RDNA4 graphics architecture. This early integration bodes well for future AMD GPU releases, ensuring Linux users have day-one support.
Core Performance Boost: The AMD P-State driver now includes handling for AMD Core Performance Boost. This driver gives AMD Core users more granular control over turbo and boost frequency ranges.
Fast Collaborative Processor Performance Control (CPPC) Support: Overclockers who want the most power possible from their computers will be happy with this improvement to the AMD P-State driver. This feature enhances power efficiency on recent Ryzen (Zen 4) mobile processors. This can improve performance by 2-6% without increasing power consumption.
AES-GCM Crypto Performance: AMD and Intel CPUs benefit from significantly faster AES-GCM encryption and decryption processing, up to 160% faster than previous versions.

Intel lost a bid to design and manufacture Sony's PlayStation 6 chip in 2022, dealing a blow to its contract manufacturing business. The contract, worth potentially billions in revenue, went to rival AMD after Intel failed to agree on pricing with Sony, Reuters reported Monday.

Discussions between the companies spanned months and involved top executives. Intel's loss has hampered CEO Pat Gelsinger's turnaround strategy, which hinges on expanding the company's foundry operations. The PlayStation deal would have provided steady business for Intel's struggling manufacturing arm, which reported $7 billion in operating losses last quarter. Sony's need for backwards compatibility with older PlayStation models complicated Intel's bid, as AMD designed chips for previous console generations, the report adds.

Further reading:
Intel Foundry Achieves Major Milestones;
Intel Weighs Options Including Foundry Split To Stem Losses:
Intel's Money Woes Throw Biden Team's Chip Strategy Into Turmoil.

Last October Slashdot reported on René Rebe's discovery of a random illegal instruction speculation bug on AMD Ryzen 7000-series and Epyc Zen 4 CPUs — which Rebe discussed on his YouTube channel.

But this week's YouTube episode had a different ending, reports Tom's Hardware... Two days ago, tech streamer and host of Code Therapy René Rebe was streaming one of many T2 Linux (his own custom distribution) development sessions from his office in Germany when he abruptly had to remove his microphone and walk off camera due to the arrival of police officers. The officers subsequently cuffed him and took him to the station for an hour of questioning, a span of time during which the stream continued to run until he made it back...

[T]he police seemingly have no idea who did it and acted based on a tip sent with an email. Finding the perpetrators could take a while, and options will be fairly limited if they don't also live in Germany.
Rebe has been contributing to Linux "since as early as 1998," according to the article, "and started his own T2 SD3 Embedded Linux distribution in 2004, as well." (And he's also a contributor to many other major open source projects.)

The article points out that Linux and other communities "are compelled by little-to-no profit motive, so in essence, René has been providing unpaid software development for the greater good for the past two decades."

In 2015 Amazon purchased chip designer Annapurna Labs, remembers IEEE Spectrum, "and proceeded to design CPUs, AI accelerators, servers, and data centers as a vertically-integrated operation."

The article argues that while AMD, Nvidia, and other big-name processor companies may also want to control the full stack (purchasing server, software, and interconnect companies) — Amazon Web Services "got there ahead of most of the competition." (IEEE Spectrum interviews Ali Saidi, technical lead for the AWS Graviton series of CPUs, and Rami Sinno, director of engineering at Annapurna Labs, on "the advantage of vertically-integrated design — and Amazon-scale...") Sinno: I was working at Arm, and I was looking for the next adventure, looking at where the industry is heading and what I want my legacy to be. I looked at two things: One is vertically integrated companies, because this is where most of the innovation is — the interesting stuff is happening when you control the full hardware and software stack and deliver directly to customers.

And the second thing is, I realized that machine learning, AI in general, is going to be very, very big. I didn't know exactly which direction it was going to take, but I knew that there is something that is going to be generational, and I wanted to be part of that. I already had that experience prior when I was part of the group that was building the chips that go into the Blackberries; that was a fundamental shift in the industry. That feeling was incredible, to be part of something so big, so fundamental. And I thought, "Okay, I have another chance to be part of something fundamental."

[...] At the end of the day, our responsibility is to deliver complete servers in the data center directly for our customers. And if you think from that perspective, you'll be able to optimize and innovate across the full stack. It might not be at the transistor level or at the substrate level or at the board level. It could be something completely different. It could be purely software. And having that knowledge, having that visibility, will allow the engineers to be significantly more productive and delivery to the customer significantly faster. We're not going to bang our head against the wall to optimize the transistor where three lines of code downstream will solve these problems, right...?

We've had very good luck with recent college grads. Recent college grads, especially the past couple of years, have been absolutely phenomenal. I'm very, very pleased with the way that the education system is graduating the engineers and the computer scientists that are interested in the type of jobs that we have for them.
It's an interesting glimpse into the unique world of designing chips at Amazon.

Graviton technical lead Saidi: I've been here about seven and a half years. When I joined AWS, I joined a secret project at the time. I was told: "We're going to build some Arm servers. Tell no one...

"In chip design, there are many different competing optimization points. You have all of these conflicting requirements, you have cost, you have scheduling, you've got power consumption, you've got size, what DRAM technologies are available and when you're going to intersect them... It ends up being this fun, multifaceted optimization problem to figure out what's the best thing that you can build in a timeframe. And you need to get it right."

An anonymous Slashdot reader writes: Haiku (the MIT-licensed operating system, inspired by BeOS) has released its fifth beta for Haiku R1.

Some new features include improved UI color management, improved dark mode coloring, Tracker improvements, TUN/TAP support for VPN connections, TCP throughput improvements, performance optimizations, UFS2 (BSD's filesystem) read-only support, new FAT filesystem driver, improved hardware support, improved POSIX compliance, improved performance, and more.
Slashdot has been covering the fate of the BeOS since 2000 (as well as the short-lived derivative project ZETA — and Haiku).

And now "With a history of over two decades and previously known as OpenBeOS, today's Haiku is pushing forward..." writes the site NotebookCheck: Haiku is a spiritual successor to BeOS, with a focus on a clean and user-friendly design paired with low system requirements. The minimum system requirements are still an Intel Pentium II/AMD Athlon CPU or better, at least 384 MB RAM, an 800x600 screen, and at least 3GB storage. It works on both 32-bit and 64-bit x86 PCs, and the 32-bit version can run many unmodified BeOS applications. It might be the best desktop open-source operating system not based on Linux or Unix... It works well in a virtual machine like VirtualBox or UTM.

AMD has introduced Variable Graphics Memory (VGM) for its AI 300 "Strix Point" laptops, allowing users to convert up to 75% of their system memory into dedicated VRAM via the AMD Adrenalin app, enhancing gaming performance for titles requiring more VRAM. The Verge reports: You might be wondering: does that extra video memory actually make a difference? Well, it depends on the game. Some games, like Alan Wake II, require as many as 6GB of VRAM and will throw errors at launch if you're short -- Steam Deck, Asus ROG Ally, and Lenovo Legion Go buyers have been tweaking their VRAM settings for some time to take games to the threshold of playability. But in early testing with the Asus Zenbook S 16, a Strix Point laptop that's already shipped with this feature, my colleague Joanna Nelius saw that turning it on isn't a silver bullet for every game. With 8GB of VRAM, the laptop played Control notably faster (65fps vs. 54fps), but some titles had smaller boosts, no boost, or even slight frame rate decreases.

Intel launched its new Core Ultra 200V-series processors on Tuesday, promising significant improvements in power efficiency, performance, and battery life over competitors and previous generations. The company claims the chips offer "historic x86 power efficiency" and the "world's fastest mobile CPU cores." The processors, available for pre-order in OEM systems and shipping September 24, feature four Lion Cove P-cores and four Skymont E-cores with boost speeds up to 5.1 GHz.

Intel says the chips deliver up to 20.1 hours of battery life, Tom's Hardware reports, outperforming Qualcomm's Snapdragon X Elite by nearly two hours and AMD's chips by almost four hours. Intel asserts a 30% faster gaming performance than competing processors and highlighted compatibility issues with Qualcomm's chips, noting that nearly two dozen games used for benchmarking failed to run on X Elite chips. The company claims up to 64% advantage in single-threaded performance over Qualcomm Snapdragon X Elite and up to 33% over AMD Strix Point HX370.

Nvidia dominates the chips at the center of the AI boom. It wants to conquer almost everything else that makes those chips tick, too. From a report: Chief Executive Jensen Huang is increasingly broadening his company's focus -- and seeking to widen its advantage over competitors -- by offering software, data-center design services and networking technology in addition to its powerful silicon brains. More than a supplier of a valuable hardware component, he is trying to build Nvidia into a one-stop shop for all the key elements in the data centers where tools like OpenAI's ChatGPT are created and deployed -- or what he calls "AI factories."

Huang emphasized Nvidia's growing prowess at data-center design following an earnings report Wednesday that exceeded Wall Street forecasts. The report came days after rival AMD agreed to pay nearly $5 billion to buy data-center design and manufacturing company ZT Systems to try to gain ground on Nvidia. "We have the ability fairly uniquely to integrate to design an AI factory because we have all the parts," Huang said in a call with analysts. "It's not possible to come up with a new AI factory every year unless you have all the parts." It is a strategy designed to extend the business success that has made Nvidia one of the world's most valuable companies -- and to insulate it from rivals eager to eat into its AI-chip market share, estimated at more than 80%. Gobbling up more of the value in AI data centers both adds revenue and makes its offerings stickier for customers.

[...] Nvidia is building on the effectiveness of its 17-year-old proprietary software, called CUDA, which enables programmers to use its chips. More recently, Huang has been pushing resources into a superfast networking protocol called InfiniBand, after acquiring the technology's main equipment maker, Mellanox Technologies, five years ago for nearly $7 billion. Analysts estimate that InfiniBand is used in most AI-training deployments. Nvidia is also building a business that supplies AI-optimized Ethernet, a form of networking widely used in traditional data centers. The Ethernet business is expected to generate billions of dollars in revenue within a year, Chief Financial Officer Colette Kress said Wednesday. More broadly, Nvidia sells products including central processors and networking chips for a range of other data-center equipment that is fine-tuned to work seamlessly together.

An anonymous reader quotes a report from overkill.wtf: The team behind popular emulation tool EmuDeck is today announcing something rather special: they've spent the first half of 2024 working on their very first hardware product, called the EmuDeck Machine, and it's due to arrive before the year is out. This EmuDeck Machine is an upcoming, crowdfunded, retro emulation mini PC running Bazzite, a Linux-based system similar to SteamOS. [...] This new EmuDeck Machine comes in two variants, the EM1 running an Intel N97 APU, and the EM2 -- based on an AMD Ryzen 8600G. While both machines are meant as emulation-first devices, the AMD-based variant can easily function as a console-like PC. This is also thanks to some custom work done by the team: "We've optimized the system for maximum power. The default configuration of an 8600G gets you 32 FPS in Cyberpunk; we've managed to reach 47 FPS with a completely stable system, or 60FPS if you use FSR."

Both machines will ship with a Gamesir Nova Lite controller and EmuDeck preinstalled naturally. The team has also preinstalled all available Decky plugins. But that's not all: if the campaign is successful, the EmuDeck team will also work on a docking station for the EM2 that will upgrade the graphics to an AMD Radeon 7600 desktop GPU. With this, in games like Cyberpunk 2077, you'll be able to reach 160 FPS in 1080p as per EmuDeck's measurements. You can preorder the EmuDeck Machines via Indigogo, starting at $322 and shipping in December.

Phoronix's Michael Larabel benchmarked AMD's latest Ryzen 9 9950X in several different Linux distros and found that the Zen 5 chip performs up to 16% faster with the Intel-optimized Clear Linux distro. Here's an excerpt from the report: The Linux distributions for this round of testing on the AMD Ryzen 9 9950X included Arch Linux, CachyOS, Clear Linux, Fedora Workstation 40, Ubuntu 24.04 LTS, and a recent daily snapshot of Ubuntu 24.10 in its current development form. Intel's Clear Linux is the one most interesting for looking at on the new AMD Zen 5 hardware. While there hasn't been so much Clear Linux news in recent times, it remains the most well optimized x86_64 Linux distribution out of the box. Clear Linux makes use of compiler function multi versioning, performance-minded defaults, aggressive compiler CFLAGS/CXXFLAGS defaults, optional AVX-512 usage for more libraries, and many other patches and optimizations in the name of delivering the greatest x86_64 Linux performance. And while not Intel's focus, it works typically on AMD hardware too. [...]

Using the same Ryzen 9 9950X system, all of these Linux distributions were tested in their default / out-of-the-box state. [...] When taking the geometric mean of 59 benchmarks run across all of the Linux distributions on this AMD Ryzen 9 9950X system, Intel's Clear Linux easily took the crown. Ubuntu 24.04 LTS -- which was used for all of the Ryzen 9000 series Linux testing so far on Phoronix -- was the slowest. Tapping Intel's Clear Linux netted a 16% improvement on top of the performance offered by Ubuntu 24.04 LTS! Ubuntu 24.04 with the Ryzen 9000 series was already looking great generationally, but as shown today the performance can be even better with further software optimizations.

The Arch Linux powered CachyOS that is tuned out-of-the-box with a similar aim to Clear Linux also performed great. CachyOS was 7% faster than Ubuntu 24.04 LTS based on the geo mean and 3% faster than upstream Arch Linux itself. For different workloads though the CachyOS advantage over Arch Linux varied from a minimal difference to quite significant advantages. From the performance of PHP and Python scripts atop Clear Linux to compiling various server and HPC minded software, Intel's Clear Linux -- and a commendable second place for CachyOS -- were showing that even greater performance can be achieved on the AMD Ryzen 9 9950X. Even for devoted Ubuntu Linux users, these results did show some nice advantages of the upcoming Ubuntu 24.10 release over Ubuntu 24.04 LTS thanks to the GCC 14 compiler. Ubuntu 24.10 performance is also still subject to change since the current daily ISOs haven't yet moved past the Linux 6.8 kernel while Ubuntu 24.10 in October will be shipping with Linux 6.11.

An anonymous reader quotes a report from Ars Technica, written by Andrew Cunningham: Back in 2013, Nvidia introduced a new technology called G-Sync to eliminate screen tearing and stuttering effects and reduce input lag when playing PC games. The company accomplished this by tying your display's refresh rate to the actual frame rate of the game you were playing, and similar variable refresh-rate (VRR) technology has become a mainstay even in budget monitors and TVs today. The issue for Nvidia is that G-Sync isn't what has been driving most of that adoption. G-Sync has always required extra dedicated hardware inside of displays, increasing the costs for both users and monitor manufacturers. The VRR technology in most low-end to mid-range screens these days is usually some version of the royalty-free AMD FreeSync or the similar VESA Adaptive-Sync standard, both of which provide G-Sync's most important features without requiring extra hardware. Nvidia more or less acknowledged that the free-to-use, cheap-to-implement VRR technologies had won in 2019 when it announced its "G-Sync Compatible" certification tier for FreeSync monitors. The list of G-Sync Compatible screens now vastly outnumbers the list of G-Sync and G-Sync Ultimate screens.

Today, Nvidia is announcing a change that's meant to keep G-Sync alive as its own separate technology while eliminating the requirement for expensive additional hardware. Nvidia says it's partnering with chipmaker MediaTek to build G-Sync capabilities directly into scaler chips that MediaTek is creating for upcoming monitors. G-Sync modules ordinarily replace these scaler chips, but they're entirely separate boards with expensive FPGA chips and dedicated RAM. These new MediaTek scalers will support all the same features that current dedicated G-Sync modules do. Nvidia says that three G-Sync monitors with MediaTek scaler chips inside will launch "later this year": the Asus ROG Swift PG27AQNR, the Acer Predator XB273U F5, and the AOC AGON PRO AG276QSG2. These are all 27-inch 1440p displays with maximum refresh rates of 360 Hz.

AMD agreed to buy server maker ZT Systems in a cash and stock transaction valued at $4.9 billion, adding data center technology that will bolster its efforts to challenge Nvidia. From a report: ZT Systems, based in Secaucus, New Jersey, will become part of AMD's Data Center Solutions Business Group, according to a statement Monday. AMD will retain the business's design and customer teams and look to sell the manufacturing division. Closely held ZT has extensive experience making server computers for owners of large data centers -- the kind of customers that are pouring billions into new AI capabilities. The acquisition will "significantly strengthen our data center AI systems," AMD Chief Executive Officer Lisa Su said in the statement.