:O :O Hhi i'm new here, and it's my first post. :P I have a dual amd processors system, and it works greatly I have 2 amp mp processors. I don't know if you can use an XP processor to work with dual thread motherboard. Why do you use an xp processor ? Actually, you can work with one processor, without a "terminator", but you should use an MP processor. forget win Me, 98, 2000 => you must work with NT 4.0, win XP pro. ANd you can calibrate your machine by the bios (it is not easy, but use the notice). Before the calibration, search the voltage of your cpus, ram, the frequency of your rams, etc., to adjust all jumpers on the motherboard. Then, you can configure the bios. My english isn't really, because i'm french. SORRY :P ;) bye