Max
My Compaq (actually an HP) SR1519UK ran Windows 7 64 bit quite happily in 2GB of RAM. It originally came supplied with 32 bit XP although capable of 64 bit.
I put an extra 2GB in to bring it up to 4, and to be honest didn't notice much if any difference in performance.
Others more expert than I can perhaps explain why the machine can still only see just over 3 of these 4 GB. I was (too late ) told it would have been more cost effective just to put one extra 1GB stick in.
Last edited by tow1709; 7th April 2014 at 17:18.
Reason: add bit about original OS