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Gtx 460 tanked in kombuster

Last response: in Graphics & Displays
October 25, 2011 3:32:51 PM

Hello all I was just trying to improve my sli performance and found a page online about using the GeForce SLI Profile Tool and with the help of the information I read I imported a cop and pasted profile that was designed for Kombuster.
I imported the profile and my 460 sli went down to 1 fps?…I downloaded the nvidia profile manager, copy and pasted the text in your profile saved it as sli settings imported it with the profile manager and the ran kombuster, then it tanked, what did I do wrong?…
before my minimum frame rate was around 11 average around 30.
October 25, 2011 3:34:47 PM

This is what I followed (bahhh)

1 – How to enable SLI support for GeForce cards

GeForce GTX 460 SLI
MSI GTX 460 Cyclone, 2-way SLI

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

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

KMark, OpenGL 4, Preset 1080, GPU PhysX
2370 points (60 FPS) – GTX 460 2-way SLI with profile
1505 points (32 FPS) – GTX 460 single
1367 points (20 FPS) – GTX 460 2-way SLI without profile

MSI Kombustor, burn-in module
MSI Kombustor, burn-in test

Burn-in test, OpenGL 2, 1920×1080 fullscreen, no AA, Post FX Off
4102 points (68 FPS) – GTX 460 SLI with profile
2063 points (34 FPS) – GTX 460 single

Burn-in test, OpenGL 2, 1920×1080 fullscreen, no AA, Post FX On
2076 points (35 FPS) – GTX 460 SLI with profile
1042 points (17 FPS) – GTX 460 single