I need to agree with Byrd here, pushing 500 MHz in a 9600 is not going to be worth the trouble. I have a 500 MHz Sonnet G3 in my 8600. It runs nice, but the bus and RAM are a bottleneck it can't overcome. Beige G3s make a more versatile old-world box, and a Rev.2 B&W would be ideal. My 600 MHz B&W is considerably faster than the 500 MHz 8600, it is not just the CPU, it is the whole system.