> I'm sure it works for the MPC7400, and fairly > sure it works for the MPC7410. It's documented at not working properly on the 745x > > But Apple has put a separate thermostat on the i2c bus > > That's awkward to access and isn't directly > on the surface of the chip. I'm not sure how that works on the powerbooks. On the G5, there's an i2c chip that connects to the in-chip thermal diode. Ben.