Hello I have an hp pavillion 7960 with a wmt-lx sonic mobo I have an upgradeware p478 with a 2.6 ghz northwood, And just cant seem to get it to work. I am running pc800 rambus and am running bios 2.06. I have the voltage dip set at what the processor calls for. Anyone have any Idea? I'm stuck using a 1.3 ghz right now.