MGArcher007 said:

I recently upgraded to Windows 7 Ultimate 64-bit, and noticed that my RainMeter RAM occupation gauge was always leaning towards the 65%+ zone, and I went into my system properties and noticed that it said "5.00 GB (3.00 GB usable)".

:/
5GB is a curious number How many sticks do you have and how is it installed?
are you using Dual Channel?