i built a pc from here about a month ago and every now and then it will crash. everything will just stop. it dosnt happen in games but if i have lots of browser windows open so i think it might be memory dumps. ill check the temps but last time i checked they where good. it has no overclock but i did change the ram settings to the correct ones as on auto in the bios they where wrong. the crashes happend before but not as often. i have a 4890 so is 620 watt psu enough? thanks.