Just want to add some additional info here.
I’ve been running on a GTX 970 since launch without issues (other than so-so performance). I recently added a second GTX 970 in SLI, and since then, I’ve had this intermittent crashing issue. The performance boost with SLI was great, when it doesn’t crash.
One solution I found for the intermittent crashing issue with my setup is to set SLI mode to “single GPU mode”. This mostly disables the second GPU, and performance is about the same as using a single 970, but no crashes. I think “single GPU mode” is offloading some work to the second GPU because I see it’s GPU usage is 10-20% while playing Hitman 2. This is all DX11.
DX12 sort of “fixes” the issue, but seems to completely disable SLI no matter what settings I use in the nvidia control panel. When playing Hitman 2 on DX12, the second GPU is essentially idling (compared to 10-20% usage in single GPU DX11 mode). As expected, performance also drops significantly without SLI.
So for my setup, the best config is DX11 with SLI single GPU mode. Because I can’t use SLI effectively, I had to scale back the resolution to 1920x1080 from 2560x1440.
IOI, please fix the crashing issue when using SLI on DX11, and please allow SLI scaling when using DX12.