I just got a Palit 8800gt (only one in stock ANYwhere). I have a msi K9vgm-v mobo and athlon 64x2 6000+, 450w psu (w/27A). I uninstalled the onboard video w/ driver cleaner and turned off the comp, popped in the 8800 and hooked up the power dongle, switched it back on... nothing. What. The. ****. do I do? The 8800's fan is running, so it's getting power...is the card defective? Thanks in advance.