set your fsb stock!
go 2
www.simmtester.com dload doc memory (free)
make a self booting/memory testing floppy stick the ram back in.... boot up with the floppy and test it
try it again with your fsb were you have it now....
note: how to read a fail
starting @ bank 1 is 0mb - whater the chpis size is ex is useing 256sticks
bank 1 is 0mb to 256mb
bank 2 257mb to 512mb
bank 3 513mb to 768 mb
(tells you were the falulty or crappy stick is) its easy 2 do
Ps. i just sound that the stick doesnt o/c as well but abouve is how youd test that