Cannot overclock...please help

my rig:
Pentium 4 LGA 775 3.06ghz(HT enabled)
Vga-zotac geforce 8400gs
mainboard-Gigabyte G31M-ES2L
450W PSU

When i try to overclock in the bios under the intelligent tweaker ..if i overclock to 3.08ghz ..the PC restarts and i have a stable overclock......but when i overclock more than 3.08 ghz for example-3.22 ghz......the pc restarts twice but again restores itself to its original values i.e. 3.06ghz

I am new to this forums..

Please help me i want to overclock my cpu.
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More about cannot overclock please help
  1. What I could say is get a new overclockable PC... BTW, B$ you overclocking, why need the OC? Games these days is either just GPU or both GPU and CPU intensive...
  2. I don't think g31 chipsets are good to overclock. :p
    Sorry to tell you that
  3. Not exactly true. It depends a lot on the CPU you are using with the chipset.

    The G31/G41 is an economy chipset with a limited FSB frequency range. Used with a CPU with up to a 200 MHz FSB, it's pretty good.

    Your problem is the P4. P4's simply do not have the overclocking headroom that the Core2 CPU's do. Here's what you can try:

    Shadow's Gigabyte motherboard OC guide:
    It's for an EP35-DS3L but all the Gigabyte Core2 BIOS's are similar. The G31 will have fewer adjustable settings.

    Take the memory settings off Auto and set the System Memory Multiplier to 2.0.

    Now, start pushing the FSB freq upward. You need to constantly monitor your core temps.

    If you are running stock cooling, I doubt if you can get much past 3.2 GHz.
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