Hello, I have a compaq R4125CA with an AMD 3800+ CPU on socket 939. I would like to put in an AMD 4000 X2, but unfortuantely there is no bios support to activate the second core. I have read of other people putting a dual core processor in this same model and having it operate with just one core. Does anyone know what the possability of getting open-bios running on this system would be and activating the second core that way? Also, would it be possible to write a hook or patch the existing compaq bios to activate the second core? Maybe some code executed pre OS boot, like in the boot loader? I'm not sure how involved it would be to activate the second core, if tables must be set or just registers set, etc? I've been toying with this notion for awhile and have recieved some discouraging comments of the laptops ability to handle the heat dissipation, but I think it can handle it witha few updates to the thermal module and some high quality thermal paste. I'm not too concerned about battery life. Thanks, Spencer