Look very much like a G5 CPU so the answer would be no. The only processors that will fit the Sawtooth are 400MHz, 45)MHz and 500MHz CPU's from Sawtooth and Gigabit Ethernet computers. None of the 133MHz system, bus speed from later machines, or faster, or G5's will work hence checking out the link from OWC.
When you check out the price of CPU upgrades at $400-$500 you will get a much faster dual processor G5 for that much and that is the problem with CPU upgrades, cost has priced them out of the market place. Did use a 1.4GHz CPU upgrade from OWC some five years ago and the unit was okay, just, for running Leopard.