Thinkpads Forum

I've been reading the Vista 64 newsgroup from Microsoft and they state that depending on the BIOS one may see from 3.12 GB to 3.5 GB when one has 4 GB RAM installed under Vista 32.

Can anyone tell me the number on an T61(p)? Or if not, an T60(p)?

the most you will see is 3GB.   please see this sticky: T60/T61/p memory limitations -- the definitive answer

this topic has been covered ad nauseum and is answered by the above sticky.