hi their my friend has given me his computer to try and fix. he has recently brought a 5850 extreme to replace his 4850. he keeps getting random locking up (screen goes black) in games at least 3 times a minute. i rack my brain over what is causing it. i figured it can’t be the drives (as i have the same and it is running fine) i then noticed that he only had a 400w psu (with only 1 pcie 6pin connector the other via a Molex) so the question is could the psu cause lock ups (is it starving the card of power) he is very reluctant to spending £50 on something that isn’t guaranteed to fix the problem.

