DS4, bios version f3.
Go into bios ->
Select MB Intelligent Tweaker ->
In the MB Intelligent Tweaker screen, set:
CPU clock ratio: 8x
cpu host clock control: enable
cpu host clock frequency: 400
PCI Express frequency: 100
C.I.A.2: disable
Performance Enhance: standard
System memory multiplier: [2.66D]
Dram Timing Selectable: Manual
Standard Timing control:
6
6
6
18
System voltage control: manual
DDR2
Overvoltage: +0.2 to +0.4 (depends on your memory's rated voltage.
Overvoltage starts with 1.8volts base. If ram is rated to run at
2.0volts, it's 1.8+0.2=2.0volts. If ram is rated to run at 2.2 volts,
it's 1.8+0.4=2.2volts.) Running at higher voltage increases stability,
but also increase heat. Running at voltage higher that memory's rated
voltage can damage it.
Loadline Calibration: Enable
CPU Voltage
Control: 1.4 to 1.5, higher voltage increases stability, but produce
more heat. Try 1.4 first, if unstable, try 1.45, if still unstable, try
1.5. Do not go over 1.5.
Leave everything else at default.
If your system does not run stable, set System Memory Multiplier to [2.00D] to downclock it from 1066mhz to 800mhz.
If
your system is stress tested stable, you can choose to tightening ram
timing(Standard Timing Control) for a small performance increase.
6/6/6/18 is high, the lower those numbers, the faster it runs.
Those settings are for 3.2ghz on Q6600. If your system stress tested stable, set CPU Clock Ratio to 9x for 3.6ghz.
Before you overclock, install a good aftermarket cooler with thermal grease/thermal compound. Do not overclock on stock cooler.