hmm if it's one of those cards that gives full power only when connected, and still works but not at full power if it's not connected to the PSU, then I suppose you could try disconnecting the power connector from the gpu, running some benchmark, and the reconnect it and run it again.
if the benchmarks are identical you know that something's wrong, if it's noticeably faster with the power connector plugged in then everything should be fine.
other than that I don't know an easy way unfortunately.
Likot Mosuskekim, Woodcutter cancels Sleep: Interrupted by Elephant.
