Okay, I have done some extensive calculations and base voltage is 0.6v (VDD1 OFF) and each increment after that is equal to 0.0125V. So 0x1e equates to 0.975v
stock: 1e = 0.975V x 125 MHz = 119 26 = 1.075V x 250 MHz = 289 30 = 1.200V x 500 MHz = 720 36 = 1.275V x 550 MHz = 894 3c = 1.350V x 600 MHz = 1094 3c = 1.350V x 720 MHz = 1312 overclocked: 3c = 1.350V x 750 MHz = 1367 3c = 1.350V x 810 MHz = 1476 3c = 1.350V x 850 MHz = 1549 3c = 1.350V x 900 MHz = 1640 3c = 1.350V x 950 MHz = 1731 ideal kernel: 1e = 0.975V x 500 MHz = 475 21 = 1.012V x 550 MHz = 564 26 = 1.075V x 600 MHz = 693 2d = 1.163V x 700 MHz = 946 2d = 1.163V x 750 MHz = 1014 30 = 1.200V x 810 MHz = 1166 30 = 1.200V x 850 MHz = 1224 36 = 1.275V x 900 MHz = 1463 36 = 1.275V x 950 MHz = 1544 3c = 1.350V x 1000 MHz = 1823 43 = 1.438V x 1100 MHz = 2273 48 = 1.500V x 1150 MHz = 2588