guys, what are the signs that a chip is havin weak imc? I'm having hard time to get my nb freq prime stable @ 2500MHz & ram @ 16xxMHz with higher cpu clock e.g > 3.7GHz. I have no problem runnin 2500MHz nb freq & ram @ 16xxMHz with lower cpu clock like 3.5GHz.

few more questions if u guys don't mind > what is the use of:
  1. DDR VTT voltage control
  2. NB/PCIe/PLL Voltage Control


thk u in advance...