Might get new graphics card

[LiNuX]

if his mobo can handle geforce 8800 then it'll most likely be able to handle the GTX 295 - if I remember correctly, they both have the same PCI figures.

as for certain brands and models working better together - you are thinking about the motherboard and GPU chipsets

and if you want to sell it, I'd say do it on eBay, best bet to get the best deal - selling it at a store is never worth it for stuff like this