also have noticed low utilization from A3

Intel I7 3770k 3.50 Ghz stock clock
Amd Ati 7970 3 ddr 5 3 gig sapphire
Asus P8z77-v lx
Focusrite Scarlett 2i2 USB sound card
16 Gig Ram 1333 Ghz
Antech case 9000
Psu ^ 600 watts