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MSI Kombustor SLI issues. - Page 2

post #11 of 14
Hello I just tried to use Kombuster for SLI and only one gpu is being tested. Does Kombuster only test 1 gpu card at a time? It shows both cars but only activates 1. I thought my 2nd card was dead until I ran 3DMark11 and verified the temps and other parameters via MSI Afterburner. Is there an update that allows SLI?

Thanks...Al
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Double Dip'n
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post #12 of 14
I don't think there is an SLI profile.

Try OC Scanner at full screen mode instead.
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post #13 of 14
Just use Furmark... it is the same thing but works correctly for 2-3-4 cards. ie it will test them all at once. unlike kombuster which I have never seen test more than 1 card. why I use Furmark.
post #14 of 14
For simple OpenGL applications, just follow the steps described HERE. But for MSI Kombustor, tweaking SLI in NVIDIA control panel is not enough to get the most of your GPUs because of the post processing. If you run KMark in 1080 preset, a 2-way SLI system will have a lower score than a single GPU system. With default settings, NVIDIA drivers are not able to properly handle OpenGL scenes with post processing effects (via FBO / render to texture or RTT). It’s not a bug in the driver but rather a matter of politics or something like this.

Even if you follow (and I followed) NVIDIA’s guide (SLI Best Practices), your application is not still able to fully exploit SLI. For example, a single GTX 460 has a score of 1505 points (32FPS) in KMark Preset Extreme (KMark is Kombustor OpenGL 4 benchmark) while two GTX 460 in SLI have a score of 1367 points (20 FPS) for the same preset.

Then what is the solution?

Simply tweaking the NVIDIA profile with GeForce 3D Settings Profile Manager. This tool, developed by NVIDIA, allows to export and import the profile file. The profile file is a simple text file anyone can edit with a simple text editor. Here is a profile that works fine for MSI Kombustor and allows to take advantage of n-way SLI up to four GPUs:

Profile "MSI Kombustor"
ShowOn GeForce
ProfileType Application
Executable "MSIKombustorDX9.exe"
Executable "MSIKombustorDX10.exe"
Executable "MSIKombustorDX11.exe"
Setting ID_0x00a06946 = 0x084000f5
Setting ID_0x1033cec1 = 0x00000003
Setting ID_0x1033cec2 = 0x00000002
Setting ID_0x1033dcd2 = 0x00000004
Setting ID_0x1033dcd3 = 0x00000004
Setting ID_0x1095def8 = 0x02c00005
Setting ID_0x20441369 = 0x00000001
Setting ID_0x209746c1 = 0x04280001
Setting ID_0x20ebd7b8 = 0x00000020
EndProfile

Just copy and paste this profile in NVIDIA profile file and import it with the GeForce 3D Settings Profile Manager utility.
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