From time to time I see people bragging that they have 6 gigs of memory, or even 8 gigs. But out of that 6 or 8 gigs, how much do you "really" use? My home computer is a gaming machine - I'am running 32-bit windows xp, and 3 gigs of memory. Of that 3 gigs, I probably have 1.5 gigs free at all times. Even when I'am playing left 4 dead 2,,,,, or any other game. I can have task manager running in the background, alt-tab out of the game and look at memory and CPU usage. Out of 4 cores, all 4 only only being used about 50% and I still have about 1.5 - 1.8 gigs free memory. There are times when I might get down to 1.2 gigs free, but that is rare. Even when I'am editing a video for youtube, I still have 1.5 - 2 gigs free memory. How much memory does your system have, what do you use it for, and how much free memory do you have under a load?