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Couldn't see a 280 on the list of cards but if you look at this comparison between a 285 and a 470, I would concentrate on the Crysis warhead example as I suspect Skyrim could be equal or more demanding graphically than Crysis Warhead and you will see the 285 is struggling, even at 1680 X 1050, upgrade time methinks for you buddy.
Maybe this card for the extra memory and future proofing, or this card if you are not too bothered about extra memory.![]()