i currently have a new Compaq Presario CQ60. It came with a AMD Semperon processor. I check with AMD and they say it is a 64 bit, and that 32 bit will run no problem. I checked with Compaq, and they are hesitant to say I can upgrade my CPU, but they do offer the exact same notebook, just with a AMD Athalon dual core. AMD says that it would be a S1 socket, and that the Athalon should work as long as I have the BIOS upgraded. Checked back with coinkmpaq, and they say that the BIOS upgrade is a cover all for ALL AMD processors. AMD says I should be able to put in a Turion 64 bit Dual core no problem, as long as it an S1 socket.
So........ Now on to ya'll, what do you think? Has anyone done this, replaced their CPU in a laptop? I would really like to add one that is faster, as I already added a 500GiB hard drive, and want to put 4GiB of ram in and have a smoking fast work machine.