get msi afrterburner and log your temps. if it is really overheatng just return it as faulty, you shouldnt have to reseat thermal paste and such. Also make sure you have at least one large exhaust fan in your case.
Well, whenever anything graphics intensive comes up it just crashes and it won't load anything until it goes below 35 celcius, im going to call newegg and ask them about it, as im also returning a defective cpu fan.........
BTW here are my parts
Rosewill CHALLENGER Black Gaming ATX Mid Tower Computer Case
Seagate Barracuda 7200 1TB HDD
AMD Phenom II X2 555 Black Edition Callisto 3.2GHz (OC to 3.6 ghz)
G.SKILL Ripjaws Series 4GB 240-Pin DDR3
LITE-ON 24X DVD Writer
Rosewill Green Series RG530-S12 530W Continuous @40°C, 80 PLUS Certified, Single 12V Rail
MSI GeForce GTS 450
ASRock 870 EXTREME3