buy this card to get a little more life out of my dual core machine . I have purchase the same chip for my quad core by another mfg but only one rebate allow so i have to try this gigabyte version for the dual . I be run it in xp64 , on a dual core machine , gigabyte motherboard ga-m55plus-s3g . replace the onboard video . use it with 4 gb of memory . so far pretty good with fs2004 and a few older game from about 2006 , i.e. need 4 speed series . for the price i can not complain too much . once in a while i get a little screen flicker on startup but mostly stable . enable I to run at a much higher resolution . one of the decide factor be that the chip support xp64 , although i run win7 and vista on the quad , the dual have to handle older game , so it be nice to see support for xp64 .