enough with the bumping.
is your processor knacked? try it in another machine if you can. be very careful tho, don't take any chances with someone else's kit.
then - if the CPU is ok, get it working with a very very thin layer of thermal paste (don't use loads just cos you're excited about buying it - i make these mistakes too).
if the CPU's dead, buy a new one. make sure before you put it in that you're happy with the heatsink and the paste/pad. the sink should be really tight on the board.
either way the next step is to check out the ram. follow the advice earlier - try one at a time, check on the crucial website that it's compatible with your board if you're unsure.
unplug everything extra on the board, USB headers, firewire etc. get it working with one hard disk and one optical drive, and a floppy if you need it for raid controllers etc.
after that, well, try it and then see what people can come up with.
hardware
prices 
