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SLI ASUS GTX580 Direct CU2.

post #1 of 8
Thread Starter 
Here's the deal, I'm thinking of moving up from my single Direct CU2 to SLI CU2s.

I need a motherboard with a whole 3 slots between each PCI port (because of the fan on the card). And ideally both ports would run at 16x instead of having two 8x.

Does this motherboard even freaking exist? I can't find it anywhere.
"The Sleeper"
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"The Sleeper"
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post #2 of 8
I could be wrong, but I don't think that 2 x16 slots in SLI gives very much more performance than 2 x8 slots. Maybe a few FPS here and there. That might allow you to narrow your search down.

I'm not sure that such a big mobo exists. I have an aftermarket cooler on my 580 and I have enough room to SLI it with another 580 with the same cooler... But I don't think it takes up much more than 2 slots. I think the Asus 580 is even wider than my setup.
post #3 of 8
check out this thread:

http://www.overclock.net/nvidia/1133...x-580-sli.html

it seems like some OC's on there have better info than I do
post #4 of 8
Rampage III Formula works quite nicely:



There is even 1 empty slot in between the cards, as you can see. However, card on the right consistently runs 2-3 degrees hotter. I can't say if the setup works in dual x16 or dual x8 mode, just never cared.
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Damnation
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post #5 of 8
Yup, the Asus Rampage III boards are laid out perfectly for this. I believe you end up at 16x/8x but it won't affect performance at all. I think if you really care about 16x/16x you have to go with like an EVGA SR-2 or Asus Revolution board, one with NF200 chip(s). But I really don't think it's necessary. SR-2 is really expensive, and the Revolution really isn't the greatest OC'ing board and runs really hot. I'd grab a Rampage III Formula or Extreme for this application.
Edited by brettjv - 10/30/11 at 12:53pm
    
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post #6 of 8
If you really want to have one free slot between your two CUII, there is the Asus P8-P67WS revolution, Gigabyte UD-7 and Asus Maximus IV ythat I know of (for SB), their layout allows this. Youy have to take care of your case though, with the UD-7 or the Maximus it's possible that your second CUII might touch the PSU, check measurrements.

Personally I plan on putting a second Matrix on my Sabertooth, I don't really care about spacing, I know plenty of people saying they SLIed CUII without space between them and it's fine.
I already have my soundcard touching the GPU on the PCI-Ex1 slot.
Edited by DaGoat - 10/30/11 at 1:18pm
post #7 of 8
This is interesting... So Rampage motherboards can have sli/crossfire 3 slot setup.. cool
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post #8 of 8

I forgot, only the Gigabyte (P67 / Z68) UD7 allows you to run two cards at x16, thanks to the NF200 chip, but it is pretty much useless. For example the Maximus IV also has an NF200 chip to allow tri-GPUs but two cards will run at x8 / x8 and 3 cards at x8 / x 16 / x16 becaus =in fact, the difference is neglible, close to 0.00001%, and if anything, two cards run actually faster at x8 / x8 on SB than at x16 / 16, see here or even


EDIT: Oh, you're on 1366, sorry. Well pretty much any Rampage or Gigabyte X58 UD-7 or UD-9 and even the Asus WS will allow you to SLI two CUII with an empty space between them, that if you really want the layout to allow this. But as I said it's not mandatory, you can run two cards touching themselves anyway it's not a big deal. It works Anyone who goes tri-SLI or Quad X-Fire does this.
Edited by DaGoat - 10/30/11 at 1:25pm
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