I just acquired a Compaq Presario 1277. It has 192 mb RAM ( maxed out), an AMD K6-2 433 Processor (100mhz FSB) and a 4.8gb hard disc. I just got the 40gb 2.5" hdd that I won on ebay and am waiting for the K6-2 533 AFX that I also won. OK so here is the problem. HP/Compaq said that the mobo would support the 533mhz but I didn't stop to think before I acted (bad move) and need to determine that the processor I bought will work in my laptop as well as in a desktop model. Any assistance would be truly appreciated.