cant see in bios where to disable cores already did msconfig boot. only shows 2 cores also tried to manualy put in 6144mb mem and it goes back to 768mb for some reason. i just installed gigabyte ma785gmt-ud2h, amd phenom 2 955 and 6 gig khx16ooc8d3k3/6gx kit (kingston hyperx) have 64 bit vista ultimate. its my first 4 core and its pissing me off that i cant figure it out myself. any help is greatly appreciated.