NEed to upgrade my pc Video card

[99gtxgolfer 10+ year member]

i bought a HItachi 42in plasma and i think i need to get a new video card for my pc, i hooked it up Via HDMI to DVi. its a costom built pc and i just bought it like 3 months ago im kindof disapointed but oh well. when i am on the computer and i move the mouse there is like a delay, when i stop moving the mouse it goes that extra little bit more, its really ***. ill have specs of pc wen i get home... any help would be awsome, suggestions on wat video card i should get and prices and such... thanks

plasma...http://www.bestbuy.com/site/olspage.jsp?skuId=7803013&type=product&productCategoryId=pcmcat95100050005&id=1142293092238

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