Will my best buy or circuit city warranty become void if I replace the video card on a desktop ?

Yeah, If I buy the warranty but I want to open it up to replace the video card on a new desktop will the warranty not work anymore?|||You should be fine as long as they don't place their own tamper proof sticker on the casing (which I doubt they would do), and if you replace the original card they probably will never notice.|||Most likely. However, if you have your old one that you can stick back in there, you're golden. They tend to add little clauses that any modifications to products will results in void of warranty.