needed advised

Hello guys,

just registered a few days ago and need some adviced on lowering my CPU and DRAM voltages? any advised regarding range to lower voltage will be highly appreciated.

my system specs are the following:
OS - Windows 7 Ultimate 64bit
Board - ASUS X58 Sabertooth BIOS ver. 0208
CPU - Intel i7 950 OC to 4.42GHz
RAM - 6 x 2 gigs DDR3 1600 T1 Kingston
PSU - Coolermaster 1000w
GPU - Nvidia 2 x GTX285 / 1 x GTX280
Cooling - Liquid cooling by Larkooler with modified tubings

BIOS setting:
AI OC Tuner: Manual
CPU Ratio: 23
DRAM Freq: 1539
QPI Link rate: Auto
DRAM timing: 8-8-8-24
Timing mode:Auto
CPU Voltage: 1.5500
QPI DRAM core voltage: 1.6000
DRAM voltage: 1.65

Note: run prime 95 for 30 mins with no error.