R50 memory problem

[AndyKH]

I just installed a 1GB module in my R50 - a 512 module was installed when I purchased it. The previous module I bought (Kingston value ram) didn't even allow my PC to post, so I searched for some guaranteed compatible ram and found Corsair Value Select 1GB module (VS1GSD333). This is the one suggested when searching for R50-1829 compatible memory on the corsair website.

I just installed it, but the thinkpad now starts to lock completely up once - the two last times already during boot at the user slection screen. I know that I'm probably dealing with bad RAM here, but could the explanation be something else?
Is there info that might suggest that R50s have problems with a 1GB module in the expansion slot? Should I mount the new module in the standard slot and move the old 512 module in the expansion slot, or should I just remove the 512 module altogether? I'm at work right now, and I didn't have time to try these configurations out after I noticed the errors, but when I get home I will try out any suggestion from you before I start experimenting.

Any advice will be appreciated

[ZaZ]

Sounds like a bad stick to me. I haven't heard of R52s having problems with 1GB sticks, I'd exchange it. It can't hurt to try it in the other slot. You can always put it back.

[AndyKH]

Thanks for the reply.

Could it be that the north bridge can't drive 32 chips? I know the 1 GB module contains 16 chips, and I think the existing 512 MB module is 16 chips also.

Well, I'l try to uninstall the 512 meg´module and see what happens.