passed memtest, prime, and 3dmark looping at 250htt.
After trying to go higher, i have discovered that no memory divider besides the 1:1 and 5:4 dividers seem to work at all it passes memtest using the 5:4 divider at 250htt, but fails miserably at 2:1, 3:4, and 7:10. So it looks like my OC is going to be pretty limited 🙁