On Sat, 03 Jul 2004 10:16:38 -0700, Jason wrote:

Surely it can't be a bad DIMM else it
would get picked up at bootup?


Not necessarily, the BIOS runs a vary basic memory test at bootup. You
need to run memtest to verify that your DIMM is good, get it from
www.memtest86.com.

It certainly sounds like your new DIMM is bad or just incompatible with
your motherboard though Crucial ram usually has good compatibility. Try
running it on its own, perhaps it doesn't like working with your other
DIMM.

K