"Sweet. That's the locked one, right. Who's the guy here who got his 1.53 to 1.8?"
I know skrill has, and I'm running one @ 1725 rock solid right now (150x11.5). I've ran as high as 1840 (160x11.5) but not stable enough to keep it there. Then again, I'm using a small Enermax 301P-VE supply which can't handle the higher core voltages (anything beyond about 1.98, forget it.) As soon as I throw in a 465P-VE I should be able to max her out.