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3-way SLI W/ Asus P6X58D-e???

post #1 of 8
Thread Starter 
I have a P6X58D-e motherboard which has 3 PCIe 2.0 slots. In the motherboard manual it says that it can utilize 3 X16 graphics card in 3-way sli but in another page of the manual it says that if two of the slots are using X16 then the third must use X8. Does anyone have any expierience using 3 way sli with something like a 580 or 570? I just want to know whta My options are as im looking into getting a new graphics card setup.
Edited by ConsciousInsanity - 7/17/11 at 12:15am
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post #2 of 8
I've got that board, basically, if you have 3 GPU's in there then you'll have all three running at x8x8x8. If you have 2 GPU's they will run as x16x16.

You loose around 3% performance with the drop from x16 to x8. And to be honest, I've gotta ask, if you're running a single screen setup, you know tri-sli with GTX570's is complete overkill.

Comps

EDIT sorry I was wrong x16, x8, x8 (3 x PCIe 2.0 x16 (x16, x8, x8 or x16, x16, x1) )
Edited by compuman145 - 7/17/11 at 2:09am
post #3 of 8
You can put 3 cards on the motherboard. It's just telling you the speeds it will be running at. 2 slots would be running at x16 while the final one is running at x8. And don't let that scare you cause you probably won't be able to notice the difference if they were all running at x16 anyways.

Enjoy your tri-sli!
 
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post #4 of 8
Quote:
Originally Posted by ConsciousInsanity;14243417 
I have a P6X58D-e motherboard which has 3 PCIe 2.0 slots. In the motherboard manual it says that it can utilize 3 X16 graphics card in 3-way sli but in another page of the manual it says that if two of the slots are using X16 then the third must use X8. Does anyone have any expierience using 3 way sli with something like a 580 or 570? I just want to know whta My options are as im looking into getting a new graphics card setup.

The black part simply means the motherboard supports 3-way SLI, without mentioning the speed of each slot.

The orange part is inaccurate. Your memory must have failed you. This motherboard can run x16/x8/x8 or x16/x16/x1 but not x16/x16/x8.

Take a look at the 2 pages of the User Manual below:-
page xi :- shows the 2 possible combinations
page 2-21:- detail explanation of each possible combination

Finally, for 3-way SLI, you will definitely want x16/x8/x8 whose speed is only a few % behind x16/x16/x16. The other option ( x16/x16/x1 ) will just be a total failure as the x1 speed slows down the entire setup too much. Take a look the 2 charts below. Note that when you get down to x4, the performance decrease is noticeable. x16 and x8 gives quite healthy performance.
Edited by windfire - 7/17/11 at 2:26am
post #5 of 8
The drop from x16 to x1 is about 15% - 20% I believe... It is a massive hit to performance.

But seriously, unless you're running a triple screen setup, 3 cards is too much for a 1080p resolution, you'll be fine with 2 GPU's...
post #6 of 8
Thread Starter 
Thanks for the help and also if you can, do you think it would be better for me to consider running 2 gtx 460's or buying 1 580 now so that as gameing tech increases I may someday upgrade to a 3 way sli 580. Thats the only reason im considering ditching my 460, because it limits sli to 2 cards and I may one day want 3-way sli, considering how advanced games of the future will be graphiclly.
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post #7 of 8
Well

To be honest mate, I'd have probably gone with 2 GTX560ti's rather than the GTX570 or 580. Two of those is more than enough for single screen gaming and pretty much on par with a single GTX590.

They are pretty much the best bang for buck around and two of those will cost the same amount as a single GTX570.

Put it this way, if the 560ti was out when I got my GTX570 I'd have got those without any thought of concern.

Comps
post #8 of 8
Thread Starter 
I thought that x16 represented the throughput of the external databus. If so wouldn't X16 ofer twice the throughput. I know im wrong im just wondering if someone can explain to me why that is.
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