64bit benchmark amd vs intel

well. where is the amd fx-74 sold in pairs?.....when is the quad core for amd coming out?.......i have the l1n64 dual socket mb....my memory is the pc2 6400 2 gig single stick x 2 = 4 gig.. plus single stick pc2 6400 1 gig x 2 = 2 gig, but because they are mixed will i have a problem??...{ diffrent makers also}.... still need two video cards that are sli.....but the mb has 4 slots for pci express.....is that four video cards? i would like the 8800 gtx video cards, but i hear there are no drivers for xp....and vista will not run the games that are used now with xp......wow.....what now? alton3262000@yahoo.com