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Vega's SLI Scaling Thread

post #1 of 38
Thread Starter 
The test settings:

SLITestSettings.jpg


Resolution 4800x2560 (3x 30" LCD Portrait). Portrait bezel correction is not working properly in nVidia driver release 270.51 so the standard resolution is used. 2x 3GB GTX580's as baseline as two cards minimum for Surround. The computer: http://www.overclock.net/water-cooling/950313-vegas-quad-sli-3gb-gtx580-sub.html

The numbers:

SLIScaling.jpg


F1 2010 in-game Benchmark: Quad SLI 75% over dual cards.

Video of SLI: [ame]http://www.youtube.com/watch?v=Nqdc66a0l3U[/ame]
Video of Tri-SLI: [ame]http://www.youtube.com/watch?v=5h6nil795M8[/ame]
Video of Quad-SLI: [ame]http://www.youtube.com/watch?v=KWZqS1wsGTc[/ame]

Lost Planet Benchmark B: Quad SLI 77% over dual cards.

DCS:A-10C "Spring Hill" simulation replay: Quad SLI 88% over dual cards.

AvP Benchmark automatic settings: Quad SLI 93% over dual cards.

Crysis 2 "Single player static entry": Quad SLI 59% over dual cards.

Batman in-game Benchmark: Quad SLI 76% over dual cards.

Metro-2033 "Single player static entry": Quad SLI 100% over dual cards.


"Single player static entry" means the single player campaign was loaded and character was sat sitting in the game world unmoved from original position during all tests. The FPS was then annotated with FRAPS.

All benchmarks were tested with the exact same settings with a reboot in-between to reconfigure SLI bridge.

Without VRAM restrictions (3GB GPUs) and full 16x PCI-E bandwidth available to all cards, there was not a single instance that Quad-SLI did not garner an appreciable performance advantage over Tri-SLI. In a number of instances, the performance gain transitioning from Tri-SLI to Quad-SLI was actually greater than the transition from SLI to Tri-SLI.

All games saw ultimately a performance increase going from SLI to Tri-SLI, and then also from Tri-SLI to Quad-SLI. Some games had just incredible SLI scaling such as Metro2033, Alien vs Predator, and DCS:A-10C. 90-100% performance gains over a dual card setup is pretty much unheard of. I attribute these large gains to no VRAM restriction and the extreme demand of this resolution.

The phrase "Quad-SLI does not scale in games" is ancient history.

Thanks for viewing!
Edited by CallsignVega - 4/12/11 at 1:45am
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post #2 of 38
Thread Starter 
Reserved.
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post #3 of 38
Very nice thumb.gif

I'm sure if you had pushed the CPU a bit more for these benchmarks, you could have gotten higher scaling results biggrin.gif

And btw, any chance you would also do those scaling tests on landscape?

I love your setup, but I can't make myself play in portrait. The frames bother me too much tongue.gif
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post #4 of 38
Scaling in Metro 2033 is really good.
post #5 of 38
Quote:
Originally Posted by CallsignVega;13094256 
The phrase "Quad-SLI does not scale in games" is ancient history.

Glad to see all your work was worth it, and your hypothesis was correct!

And those SLI numbers are better than I expected for such enormous rez. 1K is looking good.

Now I'm wondering at what resolution IMAX is displayed.
Edited by Draygonn - 4/12/11 at 2:09am
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post #6 of 38
Nice work, nice scaling, + 1

Thanks for this thumb.gif
    
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post #7 of 38
Great work, followed your build and benchmarks since day one of the new build. Glad your build is fully up and running how you want it now with those gpu block smile.gif.
post #8 of 38
you still got those 6970's?
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post #9 of 38
Well done, exactly what I was looking for.

Have you taken the heat sink off, because I am curious if Palit needs a different waterblock to fit it? EVGA says they can use the same waterblock with their 3GB revisions.
Edited by RagingCain - 4/12/11 at 12:31pm
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post #10 of 38
Quote:
Originally Posted by RagingCain;13099838 
Well done, exactly what I was looking for.

Have you taken the heat sink off, because I am curious if Palit needs a different waterblock to fit it? EVGA says they can use the same waterblock with their 3GB revisions.

yes you do need to get the waterblook made just for the 3GB cards. EK has made them and that is what he is useing.
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