Well, if the board supports a chip up to that speed, you better be damn skippy you're gonna get that speed. A board can't support a 1.2 GHz CPU and not run the chip at 1.2 GHz. There would be no point saying it supports it. LOL, our board supports 1.2 ghz CPUS, but they can't run any faster than 900 MHz. As per the link, it supports up to 1.2 GHz TBirds. I'd call them if you can get a number, usually if you tell the salespeople you're interested in buying, they'll be more than happy to assist you with any technical questions.