Hello,
AFAIK all *recent* A1s are using 933 MHz CPU (as 800
MHz ones were not available), but as the Board
(especially cooling) is designed for a 800 MHz CPU it is
clocked at 800 MHz.
Both processors operate at the same bus speed, so "in theory" the board
should operate equally reliable with either 800 or 933 MHz CPU's, so long
as the cooling demands of the processor itself are adequately met.
