First I tried my Athlon XP 1900+ in the Tyan Tiger MP motherboard, along withn the other components (see sig). I couldn't get it to POST. So, I RMA'ed the Tyan board and got a new one, but to no avail. Now I have the Shuttle Ak31A, but I still can't get the damn thing to post. Would the Tyan mobo have killed my CPU. The proc was always under active cooling. I'm attempting to clear the CMOS, and I've tried all of the reseating/removing stuff tests.