I have a dell xps 420 it has Nvidia 8800GT video card whhih I think is dying, display is unusable and bluescreens sometimes( to quick to get any details). Would like t keep it as grandson likes to play games on it. Need some suggetions for a cheap compapable replacement
That card is a collectors item and it is slowly getting uncommon and it is faster than most give it credit for. After over 4-5 years Nvidia is yet to release a budget card that beats it bang for buck as well a few other things. I suggest that you change the thermal compound with something a lot better and work to improve the cooling for the whole computer but upgrading when going amd for graphics is the way to go when on a budget. If you do buy a new card be sure to pass the old one to someone else like selling it on craigslist or ebay. $20-50 is what it is worth.
The 6670 is a good suggestion, however personally I would go with a Nvidia card, maybe a GT 440 or GTX 450. Sometimes prebuilts are a pain to switch from one company's video drivers to the other's. (because the nvidia video driver software is on your install disk, and will likely get reinstalled if you ever do work to the pc)