Just an update on my run. Thanks to Splave's tip plus a little wazaa and bit more memory adjustment (not to mention more voltage).

maxxx - 6:20:796s - 48x100 - 1250.7Mhz - 8-11-7-27-90-1t - ASUS M5G - Corsair Dominator GTX3 2x2GB/PSC - 1.86 - Air Cooling