Settings and PC Info - ISI NSX and Portugal, 12:00 AM, rain, no opponents, pit garage - GPU: 2x GTX 970 (SLI) - Nvidia Driver: v353.30 - Nvidia Profile: All default except using "prefer maximum performance" and max pre-rendered frames @ 1. NOTE: The overall framerates for these tests aren't nearly as high as could be due to the tests being performed while my GPU, RAM, and CPU were at the following slow default speeds: - GPU @ 1315/7000 MHz core/memory (instead of 1500/7500 MHz) - CPU @ 3.6 GHz (instead of 4.5 GHz) - RAM @ 16-16-16-39 2T timings (instead of 11-11-11-26 1T) TEST #1 Default SLI Compatibility Bits - 0x02402005 (Sanctum, UAZ Racing 4x4, rFactor 2[rFactor2 Mod Mode.exe], etc.) With the default SLI comp. bits I had some real weird results... - Cockpit camera, both GPUs around 55% usage and poor SLI scaling and framerates - TV cam, same thing, both GPUs around 55% usage and around 75 fps - Chase cam (or any other cam like the cam near the wheels, side panel, etc.) and the framerates rise to 145 fps with both GPUs showing 98% usage. Wow! - Then I go back to TV cam and, unlike the first time, the GPU usage stays at 98% and framerates in the 140s Basically cockpit cam always SLI scaled poorly, any other cam SLI scaled great, and TV cam SLI scaled poor if the previous cam was cockpit but SLI scaled great if the previous cam was a cam that SLI scales great (e.g. chase cam)...Weird. Using SLI Compatibility Bits: 0x02D04005 I just tried the SLI compatibility bits that I've seen others mention as of RF2 b982 called "0x02D04005 (LEGO Batman 2, LEGO Pirates of the Caribbean: The Video Game, LEGO Lord of the Rings, LEGO Star Wars III: The Clone Wars, LEGO Harry Potter: Years 1-4, LEGO Star Wars Saga, LEGO Harry Potter: Years 5-7)" and I'm happy to report that all issues are now gone and the GPU usage is at 98% for both GPUs and no matter which view is used, including the cockpit view where I'm getting over 130 fps [HR][/HR] TEST #2 - Both Reflections @ "High" - everything else same as above Default SLI Compatibility Bits - GPU Usage = 55% (both GPUs) - Framerate = 60 fps Note: Always poor SLI scaling no matter the view SLI Compatibility Bits 0x02D04005 (LEGO Batman 2, etc.) - GPU usage = 98% (both GPUs) - Framerate = 120 fps Note: Wow! Each GPU's usage stays in the mid-to-high 90s % no matter what view is used and framerates are doubled. FANTASTIC! [HR][/HR] TEST #3 - Max Graphics - except FXAA (disabled) and AA (Lvl 2) Default Compatibility SLI Bits - GPU Usage = 55% (both GPUs) - Framerate = 42 fps Note: Always poor SLI scaling no matter the view, not only that but there was major graphics corruption (solid coloured pink stuff) on the outer monitors. SLI Compatibility Bits 0x02D04005 (LEGO Batman 2, etc.) - GPU Usage = 98% (both GPUs) - Framerate = 88 fps Note: Even with all graphics settings maxed-out, SLI scaling remains pretty-much perfect (and no matter the view). FANTASTIC! TEST#4 HERE (different car and track combo) Conclusion: Until Nvidia sets it as default for rFactor 2, try SLI Compatibility Bits - 0x02D04005 (LEGO Batman 2, etc.). The SLI experience, for me, goes from "broken" to perfect!