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x8/x8 or x16/x16 for 2 way sli?

post #1 of 17
Thread Starter 
a lot of people were saying x16/x16 is faster and better than x8/x8 when configuring 2 way SLI. anyone tried 2 GTX 580 on Maximus IV Extreme?
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post #2 of 17
It is faster and better by very very little. Doesn't really matter for real world gaming.


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post #3 of 17
Thread Starter 
Quote:
Originally Posted by Citra View Post
It is faster and better by very very little. Doesn't really matter for real world gaming.


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but in the Asus User guide, they recon using x8/x8 when doing SLI or Crossfire to get better performance
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post #4 of 17
It will only make a difference in synthetic benchmarks. Any game out there will see no noticeable differences between the two.
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post #5 of 17
Thread Starter 
Quote:
Originally Posted by Doodlebro View Post
It will only make a difference in synthetic benchmarks. Any game out there will see no noticeable differences between the two.
I see. if I don't run benchmark and run x8/x8 should be fine right? does 2 way SLI increase the FPS in game like BC2?
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post #6 of 17
Quote:
Originally Posted by M.IV.E View Post
I see. if I don't run benchmark and run x8/x8 should be fine right? does 2 way SLI increase the FPS in game like BC2?
yes
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post #7 of 17
Quote:
Originally Posted by Citra View Post
It is faster and better by very very little. Doesn't really matter for real world gaming.


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true
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post #8 of 17
Quote:
Originally Posted by sockpirate View Post
yes
this is sort of misleading but also correct.

yes, having more bandwidth will give you better performance, but the difference will almost surely not be remotely noticeable.

you might get 100 more points in 3dmark 11 [woohoo?] but you're probably going to see a 1-2fps difference in actual games.
    
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post #9 of 17
Thread Starter 
Quote:
Originally Posted by xPrestonn View Post
this is sort of misleading but also correct.

yes, having more bandwidth will give you better performance, but the difference will almost surely not be remotely noticeable.

you might get 100 more points in 3dmark 11 [woohoo?] but you're probably going to see a 1-2fps difference in actual games.
Tweaktown actually done a test for running setup at x8/x8 and x16/16. but they ran the crossfire but not SLI. i wanted to see the performance of the SLI
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post #10 of 17
Quote:
Originally Posted by M.IV.E View Post
but in the Asus User guide, they recon using x8/x8 when doing SLI or Crossfire to get better performance
that's because the mive has only certain pci e lanes going through the nf200 chip... meaning that it's turned off if there isn't a third card... dual sli is x8 x8 while tri is x16 x16 x8.

The gigabyte ud7s are the ones that have all pci e lanes going though the nf200 at all times... that's why you'll see x16 x16 when using two cards. In reality not a big difference to be had and in some cases the gpu going straight to the cpu bypassing the nf200 chipset could be slightly more beneficial/faster

EDIT: why is this in the water cooling section?
Edited by badatgames18 - 8/21/11 at 11:31pm
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