just purshased the asus-m2a74-am mobo with Mushkin EM2-6400 DDR2-800 2GB and AMD Athlon X2 7550 (95W) OEM Dual-Core Socket AM2+, . noticed when trying to install xp takes forever like the computer crawls! because the memory is 800mhz do i have to change the mem clock value to 400mhz rather then 200mhz?