Hi all,
I'm trying to cobble together a frankencomputer out of two HP laptops
each suffering from various maladies. One of them has 128 MB of RAM, a
PC133 SODIMM labeled:

"PC133U-333-452"

while the other has 256 MB of RAM, a PC133 SODIMM labeled:

"PC133S-333-452"

I can use both pieces of RAM successfully in the computer with the
PC133S RAM. However, if I put both pieces in the computer with the
PC133U RAM, the 256MB of memory is completely corrupted, as confirmed
by the BIOS diagnostics or Linux memtest kernel.

Are there multiple incompatible types of PC133 RAM? Is there any way I
can get the 256MB piece of RAM to work in the computer that currently
only has 128MB?

Thanks!

Dan Lenski