hey zoson, just so ya know i have a kit of 6gb ocz platinum lv 2000mhz 9-9-9-30@1.65v
They dont work very well with my i7 970 (GT) neither.
with 2gb it can go 70Gflops in linx but <3gb and its like hitting a wall @ 54Gflops.

so, issue its not relative to 12gb.

they suck donkeybutt like yours
no offense