KMark, OpenGL 4, Preset 1080, GPU PhysX 2370 points (60 FPS) – GTX 460 2-way SLI with profileġ367 points (20 FPS) – GTX 460 2-way SLI without profileīurn-in test, OpenGL 2, 1920×1080 fullscreen, no AA, Post FX Off 4102 points (68 FPS) – GTX 460 SLI with profileīurn-in test, OpenGL 2, 1920×1080 fullscreen, no AA, Post FX On 2076 points (35 FPS) – GTX 460 SLI with profile Just copy and paste this profile in NVIDIA profile file and import it with the GeForce 3D Settings Profile Manager utility. Here is a profile that works fine for MSI Kombustor and allows to take advantage of n-way SLI up to four GPUs: The profile file is a simple text file anyone can edit with a simple text editor. This tool, developed by NVIDIA, allows to export and import the profile file. Simply tweaking the NVIDIA profile with GeForce 3D Settings Profile Manager. 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. It’s not a bug in the driver but rather a matter of politics or something like this.Įven if you follow (and I followed) NVIDIA’s guide ( SLI Best Practices), your application is not still able to fully exploit SLI. With default settings, NVIDIA drivers are not able to properly handle OpenGL scenes with post processing effects (via FBO / render to texture or RTT). If you run KMark in 1080 preset, a 2-way SLI system will have a lower score than a single GPU system. 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. Of course, these tips are also valid for other OpenGL apps like FurMark, TessMark or your own OpenGL demo!ġ – How to enable SLI support for GeForce cardsįor simple OpenGL applications, just follow the steps described HERE. Today, the article shows some other tips for enabling SLI and CrossFire support for MSI Kombustor. Several weeks ago I wrote an article about how to enable SLI / CF for OpenGL applications.
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