Ancient Asus P2B-d server board

[thepapadude]

Hello,
i have 2 P2-450 running now.
do i have to upgrade both at the same time? or will it run 2 different speed processors?

 

[brezniczky]

When I bought the same motherboard, I heard that even the series of CPU must match for this to work (which is stricter than checking only the clock rate or FSB speed, e.g. I have two SL3XY's running).