DRAM Setted to auto: 233MHZ 3.3.3.8 using Corsair TwinX CMX512-3200Pro
DRAM Voltage 3V
HTT multiplier X4 . 248x4=992

how about....
1. setting the RAM timing to 166 or 200mhz.
2. loosen the RAM timings to like 3-4-4-11
3. reducing HTT multiplier to like X2 or X3

in short - lower all the settings 1st la. then slowly tighten it.