Core 2 Duo E7500 2.93ghz to 3.00ghz
Is it possible with stock cooling and can someone explain the steps for me by the way i am using a GA-945GCM-S2L mobo
This should be your first stop.
Core2 Overclocking Guide
Next stop is Shadow's Gigabyte motherboard OC guide:
It's for an EP35-DS3L but all the Gigabyte Core2 BIOS's are similar.
Go 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 266 MHz, your memory clock should be at 533 MHz.
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.
The only problem I see is that you have an older motherboard with the 945GC equivalent of the somewhat newer G31 and G41 chipsets. I do not know how well the motherboard supports the Wolfdale CPU's.