My recent build is giving random blue screens. I have run memtest on all four 1GB sticks of RAM individually and thought I found the culprit. Now I am running 2x1GB (while I wait for replacements) which passed multiple runs in memtest. But, the other day I run into blue screens again! After this I ran memtest and it showed 4000+ errors. I have been busy recently so the machine has sat for a while. Well, today I decided to run memtest again to verify the problem and NO errors were reported. I don't understand how the same setup can be fine one minute, broken the next and then return to fine. My voltages and timing have been set to the manufacturer's recommendation the whole time(2.2V 4-4-4-12). Can someone help me with this?