I just popped a 1080 Ti into my cMP. Drivers install smoothly, both the main Nvidia package and the subsequent CUDA update. Geekbench Metal and CUDA run flawlessly. DaVinci Resolve with CUDA runs great as well. As does Heaven Benchmark. But I feel there is something wrong with OpelCL. Geekbench 4.1 OpenCL test drops out when it hits the second 'histogram' test and fails the benchmark. Luxmark also fails at least the Lobby scene (I get scores for the Ball and Mic). DaVinci Resolve from MacAppStore grinds to a halt in OpenCL mode, and that version doesn't support CUDA (Doh!). Performance in FCPX is also weak. I was under the impression that OpenCL performance with other Nvidia cards like Maxwell had recovered nicely and was in the "normal/expected" range? My poor performance together with failing benchmarks points to a more serious issue. I first thought it had something to do with my old .kext mods for my RX 480, but I've made a new MacOS upgrade install and nothing changes there. I know there are other threads discussion general performance of these cards/drivers, but I'd like to isolate this specific issue and see if it's the same for everyone, or if I have some other issue. My card has enough power and is completely stable in other benchmarks. If you have similar issues, please report. Thanks!