[ltp] R50 RAM

[cr]

More a hardware question than a Linux question, though it is running Debian 
Lenny - please excuse the slight OT

I have a R50 Type 1830 with 512MB of RAM, 256 in the accessible slot and (I 
think) 256 out of sight inside.    Most references I can find say the R50 
uses PC2700 / 333MHz RAM, so I got a 1GB PC2700  and put it in, it would run 
Grub and start Debian but then it hung solid, several times.   I put back the 
256MB which is labelled '266MHz' and it works, and Gnome Hardinfo says 
there's 512MB of RAM installed.

Several questions - did IBM change the RAM speed at some point i.e. is 266 the 
right speed for my R50, regardless of what the references say?   Can the 
internal RAM (presumably 256MB?) be changed as well as the accessible RAM?
(The biggest RAM I can get in 266MHz SODIMM seems to be 512MB).

Any pointers welcomed.

cr