Intel Licenses NVIDIA SLI Technology For P55 Chips

adeelarshad82 writes "NVIDIA announced that Intel has licensed the company's SLI technology for inclusion in upcoming products — as have a slew of major hardware partners such as ASUS, EVGA, Gigabyte, and MSI. This means the P55 chipsets that power those new socket LGA 1156 motherboards, which are based around the next-gen Nehalem architecture, will let you build systems using two or four NVIDIA-powered GPUs. Specifically, the licensing agreement covers the Core i5 and Core i7 microprocessors."

Monopoly?

[DoofusOfDeath]

So does Intel hold enough share of the chipset market, for this to become an antitrust issue?

Unless nVidia will license that same technology to ATI, it sounds like it freezes ATI out of the multi-GPU-on-Intel-chipsets market.

Re:Monopoly?

[verbalcontract]

First of all, it's AMD.

Second of all, ATI is owned by AMD. Because of them, AMD makes graphics cards. AMD also sells technology that allows two AMD cards to be used on one motherboard. Therefore, AMD will probably not pay money for the same technology that lets people purchase and use two competitor's products.

Re:Monopoly?

[snowraver1]

I don't know how a crossover cable would help with GPUs, but ATI could definately promote their CrossFire product...

Re:There's no technology here

[BrentH]

Nothing, which is why there is at least one Windows application that does exactly that.

Re:Is this IP going too far?

[rsmith-mac]

TFA says that the Intel chipsets will be limited to 8 lanes instead of 16 to give Nvidia an advantage for thier own chipsets.

If that's what TFA says, then it's full of it. The design of Bloomfield/P55 is such that there are 16 PCIe lanes coming straight from the CPU, and then another 4 lanes coming off of the P55 chipset, routed back up to the CPU through whatever interconnect Intel is using (it is in effect just a Southbridge, with the Northbridge integrated in to the CPU). This is because Bloomfield was intended to be used with a single x16 PCIe slot, it's a mid-range product. Nehalem/X58 is Intel's high-end product, and it has a much faster QPI connection coming off of the CPU to interface with a proper Northbridge to feed more PCIe lanes.

So what you have to do is split the 16 lanes in to two sets of 8 lanes, and then use those lanes to make two x16 slots that only have half the bandwidth they're supposed to (something the PCIe standard allows). That's why the Intel chipsets will be limited to 8 lanes.

The NVIDIA chipset mentioned is the NF200, which is a PCIe bridge. It would sit at the end of the 16 lanes coming from the CPU, and in turn offer 32 lanes (2x16) for PCIe slots. This gives you the full 16 lanes of bandwidth to each slot, but it doesn't get you any more bandwidth to the CPU. You still only have 16 lanes of bandwidth to the CPU. The only advantage to using a bridge chip is that it means the full bandwidth of the CPU can be dynamically allocated to a single PCIe slot, and that two PCIe devices can communicate with each other at full speed (the NF200 also has a few SLI commands that make sending data out from the CPU faster by automatically replicating it to the two slots). This does little to solve the fact that you have too little bandwidth in the first place, which is why you won't see the NF200 used too much. Plus bridges add latency and complexity to motherboard designs.

As for why a license is needed at all: because NVIDIA says so. Their products won't work in SLI mode unless they see a license or a NF200 bridge chip (which is an automatic buy-in for SLI). It's a scummy system really, the license doesn't actually do anything. At best it means some token testing was done to make sure SLI worked, when if you build to PCIe spec it would work anyhow.

Re:Jen-Hsun Huang

[Anonymous Coward]

Mods, the parent is not trolling. This is what Nvidia CEO said a while back http://techreport.com/discussions.x/14538 [techreport.com]

Re:Intel has failed us again

[coxymla]

Even if you had a SLI board already, buying another 8800GT is a horrible idea. Far more cost effective would be to sell the 8800GT you already have and upgrade to a better card (probably a 4870.)
A single new card draws less power, makes less noise and heat, takes up less space, and probably runs faster in almost every game (but maybe not synthetic benchmarks.) SLI is a bust.

Re:Monopoly?

[Chabo]

You have it backwards. Crossfire works on pretty much any motherboard with multiple PCIe slots, provided they have sufficient bandwidth between them. SLI requires the motherboard manufacturer to purchase a license from Nvidia to support SLI on the board.

If I'm not mistaken, Intel's X58 board was the first Intel-made board to support SLI, and I don't think anyone made a P45 board supporting it.