A guide for C2D Overclocking

Part1. Tidying Up Your BIOS (not all BIOS may have those options)
*You must update your BIOS to the latest version before proceeding*
1. Disable AI Tuning for ASUS ,C.I.A.2 for Gigabyte
2. Set PCI Express (PCIe) frequency @100Mhz (Auto for DS3/DS4/DQ6)
3. Set PCI frequency @33Mhz
4. Disable Hyperpath 3 (for P5W DH only)
5. Disable any spread spectrum
6. Disable Q-Fan (for ASUS only)
7. Disable Limit CPUID Max to 3
8. Disable any overvoltage protection
9. Disable C1E
10. Disable EIST
11. Disable Virtualization Technology
12. Disable No-Execute Memory Protect
13. Disable any other thing you don’t use
14. Do not enable any speed enhancements you see
Part2. Memory Adjustments
**Expand options for Gigabyte BIOS under M.I.T. by pressing CTRL+F1**
Gigabyte: Set Memory Multiplier to 2 (1FSB:1RAM operation)
ASUS: Set DRAM Frequency to DDR2-533 @266Mhz FSB (1FSB:1RAM operation)
As you increase the FSB, the RAM will follow in the pattern of 1:1 shown in BIOS.
1. Set DRAM Timing to manual or disable SPD (use SPD for P5W DH)
2. In BIOS you will see 4 separate timing digits, change them to the ones specified on
your RAM
e.g. 4-4-4-12
CAS# Latency (tCL)
RAS# to CAS# Delay (tRCD)
RAS# Precharge (tRP)
RAS# Precharge Delay or Active to Precharge (tRAS)
When 1FSB:1RAM is overclocked above the rated frequency of your RAM use the
following values
Timing: 5-5-5-15
vDIMM: 2.2V
e.g. DDR2-667 4-4-4-12 1.9V operating at ~400Mhz will need to be set to 5-5-5-15 2.2V
3. Leave the rest of other timings either at Auto or at their default values
Part3. Voltage (again not all BIOS will have the option or uses different name)
***The following voltages are to be used with Part4***
1. Set DRAM/DIMM Voltage (vDIMM) to 2.1V or 2.2V if specified by RAM (+0.3V or
+0.4V) and as you are Overcloking even if your default volatage is 1.8 set it to 2.1
2. Set MCH Voltage (vMCH) to 1.55V
3. Set FSB Voltage (vFSB) to 1.40V
4. Increase SB Voltage (vICH) by +0.1V from default-lowest value
5. Set CPU Voltage (vCore) for the following CPU
E6300=1.370V E6400=1.375V E6600=1.400V E6700=1.400V X6800=1.400V
Part4. Frequency Control
First attempt:
1. Set CPU Host Clock/Frequency (FSB) to 333Mhz (300Mhz for X6800)
2. Set CPU Clock Ratio or Multiplier to the default value for your processor
E6300-> 333*7=2331
E6400-> 333*8=2664
E6600-> 333*9=2997
E6700-> 333*10=3330
X6800-> 310*11=3410
3. Save settings and reboot
Further attempts:
1. Up even more FSB by 5Mhz or 2Mhz increasement
2. Calculate your final clockspeed
3. Up even more vCore if needed by 0.025V increasement
Part5. Stability Testing
You will need the following programs:
- CPU-Z
- Prime95
- Memtest86+
- Core Temp
- SpeedFan
1. Fire up CPU-Z and keep it running in the background to monitor clock speed
2. Fire up Core Temp to monitor temperature but since Core Temp is not so accurate use
TAT
3. Fire up SpeedFan to monitor voltages
3. Run dual instances of Prime95 in torture mode for 2 hours
4. (Optional) Run Memtest86+ for 2hrs
5. If stable go to Part4-Further Attempts, if not go back to last stable frequency
6. Once you’re happy with the settings proceed to the final part
Note1: The higher the final clock speed, the lower the temperature for CPU has to be to
maintain stableness
Note2: vCore should not fluctuate by more than +/- 0.100V. If it does, improve cooling
on MOSFETs
Note3: If an attempt fails and the computer doesn’t boot, hold down Insert key when
booting to restore default settings in BIOS
Part6. Finalising
-Lower vCore by one notch at a time until lowest possible while maintaining the same
stableness
-Do the same for vMCH, vFSB, vICH after the above step is completed
-Record the BIOS settings which works (except DFI and ASUS owners)
-(Optional) Pull off a PCMark and/or SuperPi32M score and compare to stock to gauge
performance increase
P.S. Thx to THG,ASUS,Gigabyte forums and specially GOOGLE
P.P.S. If u r not able to boot then try clearing ur CMOS Battery

Special Thanks To Rajesh For this Article

Note:- Please note the Tech-Nologic Is not responsible for any Mishaps . Do it at your own risk