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comp is restarting after about 5 to 10 minutes of playing WoW.
Firs thing I would check is dust and garbage causing overheating. It's had to imagine you would have a dust problem with a new computer yet, but its worth a check. A quick, down & dirty method is to remove the side and place a fan blowing in. If the restarts stop or are less frequent, that is an indication of overheating. Next, what wattage power supply did you install? Third, run
Memtest 86+ on your memory sticks one at a time. Download the ISO and burn to a CD and boot from it, and let it run at least 2 hours on each stick, longer if you have time. Even one error message means that stick is bad.