Palit 450 GTS 280.26 driver in new build Win7 machine keeps 'stopping' per W7. I also get the little blinking colored boxes that some have complained about.
Have a very clean system.
My PS is late 2007. But I am not gaming. Just Wordpressing and such.
Have run Memtest 4.0 to 100% on 1 gig twice and about 50% on 1 gig twice with zero issues.
Have no HD problems.