Vista - Can SP1 destroy your hardware when without it works fine?

Hello

I installed Vista Ultimate 64bit FIN SP1 during thursday morning. After
Installation I was able to login and use computer normally. Next day after I
started use SP1 I was browsing forums with Firefox3Beta5 and then got Firefox
made an error and bluescreen. After reboot I saw BIOS posting, and windows is
starting up loading bar after that screen went totally black. Ok I was
thinking Nvidia's drivers weren't working nice with SP1 so I unistalled them
from safe-mode and reinstalled them after. Ok again same problem after
reboot. Ok back to safe-mode and uninstalled drivers again (Forceware 169.25)
and rebooted. With Vista native drivers I got back in windows but even with
older nvidia drivers it didn't work. So I reinstalled whole Vista again to
see does it help.
Well after formatting completely hard disk and reinstalling Vista the same
problem continues without SP1.

So the question is. What did kill my graphic card?

Systems specs: Asus P5E, Q6600, 4x2GB 800MHz DDR2 RAM, Asus TOP 8800GT, WD
Cav. 500GB / 16MB, Windows Vista Ultimate 64bit FIN OEM.

I bought this unit after new year. I took to my PC to reseller and they said
they will take a look at it. Anyway I think I need to stop using Beta
versions with Vista 64bit. They're really unstable. (39 BSOD's during these 4
months)