Try these first:
-Turn PC off, wait a minuite then turn back on. Sometimes a quick hard reboot can fix alot of minor problems.
-Update or reinstall GPU drivers. Update Windows as well.
If those don't work, it looks like it's applying to one of the GPUs. I would reseat all of them. Also what I would do is remove one of them one at a time to see if it still causes the problem. That way if it is one of the GPUs you can isolate it the problem.