x61 System Information says I have 3063 MB. I bought 4Gb

[kennyschiff]

Called Lenovo customer service and they told me that even though my new X61's System information (and Windows) says that I have 3063MB of RAM, that the system indeed as the 4GB I purchased. System has Vista Business.

I haven't cracked it open to check, but can someone explain this?

[trekrema]

32bit Windows only sees 3gb of RAM

[kennyschiff]

OK, dumb me. Didn't realize this. So 4GB is useless in 32 bit Vista?

[erik]

two matched 2GB SODIMMs will put your system in dual-channel mode, netting a 5~8% increase in speed during memory-intensive tasks.   however, the last 1GB will still go unused under vista 32 or XP 32 and nothing can be done about it without using a different OS.   vista 32 SP1 RC reports all 4GB in a system but only 3GB of it is addressable by the system.

please see the following thread on memory limitations; T60/T61/p memory limitations -- the definitive answer

it's for the T60/T61 but the same applies for all X60/X61 systems.

[rhema83]

You can install Vista Business x64 with your license, if you want to operate in 64-bit and be able to address all that memory. Do read up on compatibility issues before proceeding.