i have an old tekram p6b40-a4x motherboard and i upgraded from a 350mhz to a 800mhz, but now i boot it up but it keeps freezing. at scandisk, at the login screen, and at the windows sign. ive changed jumpers to slow it down and changed bios settings. the furthest i got was to where all of my stuff loaded and then the mouse stopped and it froze. its a p3 800mhz 100mhz fsb and my ram is 100mhz and i have a stick of 256mb ram and a 128 stick of ram. but they are 2 different brands. (not sure if this might cause it but ill try it). HELP PLEASE!!