Installed and ran memtest 86+ for 40 hours stait this weekend on my linux laptop. No errors, but yet my machine loved to IRQL_NOT_LESS_OR_EQUAL in windows (which is generally ram related) and has frozen up a few times in linux. I think it may be heat related as it only seems to have problems when its not on its “cooling” pad. (once or twice on the pad — but thats to be expected)