Brit Abroad, I tried the 133 memory in all 3 slots, on it's own and with the other pc100 memory. The same thing kept happening. I set the the fsb at 100 so as not to fry anything. Yes it should take 256 in a DIMM, I set the BIOS to ECC and Non ECC just in case still no joy. I'll give the suppliers a ring on Tuesday. Bit reluctant to try it again as I'm still trying to get all my applications up and running again.
