This is really frustrating. I've got a server with two K20c Tesla cards. I need to use the proprietary drivers to use the CUDA toolkit. Btw, I had no trouble at all with building for CentOS 7.3 I have what NVidia claims is the correct driver package, a 340 series. It appears to build, but then fails to load. The only error I see is "no such device", which makes no sense to me, esp. since it says nothing whatever else. I've gone through the install log, and there are a bunch of Note:, and warnings, but the later I think are all about comparing signed and unsigned integers. And lsmod shows no nvidia drivers registered, but the logs claims that Error: Driver 'nvidia' is already registered, aborting... Anyone got any ideas? mark