about my hd5850 x3

[critical]

i have sapphire hd5850 extreme x3 in my system with seasonic 850w gold x series

why is it that my hash rate of the third card, always drop to 200+ once in a while and regain back to 350mhash, happens every few minutes or so

only set at core 900/300mhz ram, sapphire trix

only the third card has this problem, is it because its too hot? but its below 80 degrees

[critical]

using guiminer, phoenix

[mike678]

It could be drivers crashing? Try running it while not overclocked and see if it still does that. Also you might want to adjust your settings 900/300 gives me at least 370 megahash and I have the same card as you. I cant remember the specific number though.