5770 driver issue?

theunkown

Distinguished
Aug 29, 2010
138
0
18,680
i recently bought a 5770 sapphire non vapor but i played cod 4 for 2 days it worked fine at the end i experienced an artifact wich was resolved but now my fps in assasins creed 1 is 40 ish it was avg 90 whats up is it a driver issue or is the card heating up too much? plus if i open a utube vid the clocks get bumped from idle to 400/900 mhz and gets stuck there during games if i close it 157/300 MHz what gives?