Alright, so i've been reading it seems the usable memory is usually less than the installed one on both 32 and 64bit windows. However, something is very wrong with my PC. I'm not sure how much usable memory I had because I only realized this now when my PC started lagging hard on most games since a few days ago. I got 12GB installed memory but only 3, 96 are usable... I tried to do the reset on MSconfig but nothing changed. Any ideas?
Mobo: Asrock 990FX Extreme
Mobo: Asrock 990FX Extreme