Hey everyone. Trying to OC my XFX Radeon 5850. I guess it's Non-Reference since I cant change the Voltage. Anyways I was going through increasing the Core Clock and Memory Clock while running GPU Tool. I could increase both by at least over 100 each and GPU Tool would run with no errors. However if I try to play a video on Youtube with these settings applied my GPU crashes. I can play my HD videos that I have save on my Data Drive fine. I feel like it's something really stupid. I'll attach a screenshot of everything I think is relevant. Thanks everyone!