You can't put a Slot-1 CPU into a Socket-370 board, but you can put a Socket-370 CPU in either a Socket-370 board directly or into a Slot-1 board with the use of a "slocket" socket-to-slot adapter. Compuwiz has said that he sees a little better overclocking results with the FC-PGA's than with the Slot-1's (he sells "guaranteed" chips, BTW).