I just bought Crucial Ballistix Sport XT 8GB DDR3-1866 (PC3-14900) CL10 Dual Channel Desktop Memory Kit (Two 4GB Memory Modules). I'm noticing that my computer is constantly using 3-4 gigs and that when running other stuff it gets to 6-7 and heaven forbid i use photoshop.. Anyway is this good ram? is there something im missing here?