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Which Socket 1155(Sandy Bridge) motherboard for Multi-GPU?

post #1 of 11
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I got a question since I am running two 5770s. I want a good 1155 board for a multi-gpu solution. I will have a 2600k. I don't want a board that is going to bottleneck my 5770 CF set up, so preferably something with dual PCIE 2.0 X16 slots that will run 16x/16x in crossfire for maximum bandwidth. Thanks.
    
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post #2 of 11
x16/x16 vs x8/x8 isnt really that bad. You may see a few percent less performance at most and and most of the time it doesn't matter. Imo not worth it for the price.
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post #3 of 11
Thread Starter 
Which board runs at 8x/8x. I see a lot of these boards run at x8/x4.
    
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post #4 of 11
Quote:
Originally Posted by BigCactus;11947464 
Which board runs at 8x/8x. I see a lot of these boards run at x8/x4.
umm I'm pretty sure all the asus p67 board runs at 8x/8x and ASRock extreme 4 .
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post #5 of 11
Quote:
Originally Posted by BigCactus;11947464 
Which board runs at 8x/8x. I see a lot of these boards run at x8/x4.

All P67 boards run x8+. Just get an ASUS Pro or Gigabyte UD4P. Both have really good features and layout is nice. They should overclock the same since theres no more OCing by bclk tongue.gif
    
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post #6 of 11
If you really want x16/x16 the Gigabyte GA-P67A-UD7 has a NF200 chip so will run at dual x16

perfrel.gif

I'd go for the cheaper boards at x8
Edited by DeadMau5 - 1/9/11 at 4:57am
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post #7 of 11
Quote:
Originally Posted by DeadMau5;11947687 
If you really want x16/x16 the Gigabyte GA-P67A-UD7 has a NF200 chip so will run at dual x16

perfrel.gif

I'd go for the cheaper boards at x8

this! beat me too it
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post #8 of 11
Quote:
Originally Posted by Chewy;11947709 
this! beat me too it

While the NF200 allows you to run your cards in x16/x16, it doesn't address the fact that all LGA1155 chips only have one x16 PCI-E lane. Hence, even with the NF200 chipset, the processor still bottlenecks the data pipeline to a single x16 lane. You guys are right that the performance difference between x8/x8 and x16/x16 is negligible, but ONLY IF you are gaming on a single monitor (see this:http://www.hardocp.com/article/2010/08/23/gtx_480_sli_pcie_bandwidth_perf_x16x16_vs_x8x8/). The performance bottleneck of x8/x8 approaches 10% on triple-monitor setups like mine. I'm waiting for LGA2011, and I'm pissed at Intel for segmenting their market like this, forcing those of us with high-end setups to wait for their overpriced high-end chips. Maybe bulldozer will be worth looking into...
post #9 of 11
Quote:
Originally Posted by WRXChris;11962472 
While the NF200 allows you to run your cards in x16/x16, it doesn't address the fact that all LGA1155 chips only have one x16 PCI-E lane. Hence, even with the NF200 chipset, the processor still bottlenecks the data pipeline to a single x16 lane. You guys are right that the performance difference between x8/x8 and x16/x16 is negligible, but ONLY IF you are gaming on a single monitor (see this:http://www.hardocp.com/article/2010/08/23/gtx_480_sli_pcie_bandwidth_perf_x16x16_vs_x8x8/). The performance bottleneck of x8/x8 approaches 10% on triple-monitor setups like mine. I'm waiting for LGA2011, and I'm pissed at Intel for segmenting their market like this, forcing those of us with high-end setups to wait for their overpriced high-end chips. Maybe bulldozer will be worth looking into...

They are not forcing you to do anything, if you don't think a product is worth it there is nothing except yourself to force you to buy said product. If anything it provides a better spectrum of goods and allows valuable die space to be used on the features that people need at a specified price point.
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post #10 of 11
On second thought, I'm now thinking that the (assumed LGA2011) Q3-release Sandy Bridge procs will probably be worth the wait (at least for us multi-GPU, multi-screen peeps). PCI-E 3.0 support, 20MB L3 cache, 6 cores + HT standard, and quad-channel memory? And since we know from benchmarks that the SB architecture is 30-40% faster than Nehalem clock-for-clock, I think it's safe to say these CPUs will be at least 30-40% faster than the 980X, and that comparison ignores the larger L3 cache and memory bandwidth improvements! I'll happily pay $800-$1000 for a board, CPU, RAM, and HSF if it really is that fast.
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