is anyone using this memory ocz2n800sr4gk 2x2=4 gigs in an evga 780i mobo with xp media center 32bit . my friend couldnt get it to work . so he bought some corsair 2x2=4 6400 dhx . and it didnt work either . so he went with vista 64 and it worked . so is 2x2=4 only for 64bit or is he doing something wrong