If it is an nForce chipset, you won't get it to work. I returned mine and got the 2500+ Barton. I really wanted it to work, and it wasn't just reporting that speed. I tried installing the speed step software, and all the utilities from AMD, and nothing worked. it was way faster with the 2500 Barton than with the 2600 mobile processor. I wanted it for the low heat, and I wish it would work. I didn't want to change motherboards because I wanted the GForce4 MX 440 built in graphics with VGA and SVHS out, and I can't find anything comparable in other chipset motherboards.