Here's a strange one:
I have 1 256MB PC-133, 1 128MB PC-133, and 1 64MB PC-100 DIMM in my ASUS A7V133. I'm trying to take out the 64MB, and add it to a spare PC I'm building, but when I take it out, the computer won't boot. It'll power up, and the drives will spin up, but there's no video, and...