that's 256mb. sure,ummmmm.now i have two systems in my pc.they are 98 and xp.i wanna play some good games on xp,like cod4,bf2...so i wanna upngrade my card(x850xt is not good and old enough).but i don't want to leave my 98.this is a hard decision... and x850xt supports dx9.0b,sm3.0 8600 supports dx10.0(sure,this is unimportant)it supports sm4.0