Got some big prob. NVIDIA GeForce 7900GS

Hi all... I will try to explain my annoying prob as good as possible... Im not that good at writing english so here i go.

When i play games or watching a movie, even when i start upp my computer. I Got some colorfull pixels spread out on the screen.
(mostly in the colors red, blue and green)

When i contacted "DELL" about this they sended me mail telling me that my garanty has expired and i have to buy a new card. So i will do. But this is not my first 7900GS card. The precious one got crazy to. In a similair way. So whata hell is this?! Have some1 else had or has this problem?!

Here some info about my sys:

Intel(R) Pentium(R) D CPU 3.40GHz (2 CPUs), ~3.4GHz
Memory: 2046MB RAM
NVIDIA GeForce 7900 GS (248 MB)

If u need more info i send u a DXDIAG note.

And yes... i have upgrade all the drivers. tryied to uninstall the card and much much more... but the problem is still there... I´m getting tired of this ****. Ty for the help guys!

Just had a similar problem, the PSU wasn't strong enough. I bought a supplementary PSU and it now works a treat! I'd suggest a new PSU for you as the Dell ones aren't great. If you fancy the supplementary thing I bought.......

http://www.kustompcs.co.uk/acatalog/info_1763.html

This was a good option for me as the cables on my old system were hidden and taped down etc.

Could be a heat/fan issue as well, I never had any issues with that myself......

That's why I said he'd be better replacing......... That was a solution that worked for me. I'd guess pricing is a lot different in the USA, as the supplementary is about 50-60% of the price of any Antec in the UK.