Help with o/c e6750

I have a intel core2duo E6750 which I would like to try and run at 3GHZ from the stock setting of 2.67. I have read some of the guides on this and have tried to up the fsb from 333hz to 337hz as a start with all other settings at stock apart from disabling the cie control.
The bios just resets back to the original setting so is there something else I need to change? I am a newbie to this so any advice will be greatly appreciated. my system is
CPU E6750
motherboard GA-P35-DS3R bios f3
4G ddr2 800
also in the bios settings the dram settings are either option 1 or 2 and the manual doesn't really explain what they are, does anyone know
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  1. This should be your first stop.
    Core2 Overclocking Guide

    Next stop should be Shadow's Gigabyte motherboard OC guide:
    It's for an EP35-DS3L but all the Gigabyte Core2 BIOS's are similar.

    Read through the guides. Then take your core voltage off Auto and set your memory voltage to factory recommended values. Change the System Memory Multiplier from AUTO to 2.00, 2.00B, or 2.00D - whichever you need to set the Memory Frequency to twice the FSB. Then when you increase the FSB, the memory clock will rise in in proportion with it. At an FSB of 333 MHz, your memory clock should be at 667 MHz.

    Now start increasing the FSB frequency.

    Download CPU-Z to check your FSB:RAM ratio. It should be a 1:1 ratio.

    Warning - confusion factor between what the BIOS calls things and what CPUZ calls things. What the BIOS calls "memory frequency" is actually the memory clock. What CPUZ calls "memory frequency" is half the memory clock - DDR2 RAM, remember? It transfers two chunks of data each bus cycle. What you want in CPUZ is a 1:1 FSB:RAM ratio.
  2. Thank you jsc
    I have read the cpu guide already but not the Gigabyte guide so will look at this in more detail but first glance looks like I need to download the latest bios as mine is version f3 and f8 is the latest!
    Yes I would like to run the fsb at 400 and keep the ram at 800 as you say at 1:1 the multiplier is fixed at 8x max so will see if I can progress after the bios update
    Will let you know what happens
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