That score is definitely indicative of a problem, assuming you ran that under performance mode.
You should run MSI Afterburner and look at the clocks. If it's overheating, it'll let us know, it will also let us know if it's throttling due to heat or power issues.
You might also want to check GPU-Z to see if it's running at the right bus speed.
I notice you have a big OC on the CPU too, it's possible that could cause problems. You may want to run your system at stock settings to see if things correct themselves.