Video card causing blue screen?

[Toby]

I have a Dell *cries single tear*. It bluescreens every day, saying "Memory parity error." I had them send out a Dell tech to replace all my ram and my motherboard (for free, hot warranty, but it still didnt' fix the problem).
The tech on the phone said the problem could be caused by my video card. Or maybe I should reinstall windows. Should I go through calling Dell again to make them replace my video card (x850), or is that likely the problem?

Thanks.

P.S.

Ex-Kamikaze Pilot's Blessed Wrist Compass of Doom