Hi all, this is my first ever forum so apologies if I make some noob errors.

Apparently my first was to put this post in the wrong section.... sorry about that.

Ok, the purpose of this post.
I cannot for love nor money get my E6600 any higher than 2.5GHz (285MHz x 9.0 Cpu multiplier) on nTune.
Trouble is I have no idea where to start. I have had some verbal training from DIY friends.
Here's my nTune settings after a 3hour tune:

FSB - 285MHz x 9.0 - CPU core Freq 2,565
QDR - 1,140
DDR2 - 1,140
SPP - 3,000
MCP - 3,200
Vcore - 1.344v
Vram - 2.22v
Mem timings 2-4-3-13
If you need more info I can try to give it.

My system is as follows:
E6600 2.4GHz
Inno3D 680i SLI Mobo
2x2GB PC-8500 DDR2 Corsair Dominator + Airflow fan
Zalman CNPS9500 CPU fan
Coolermaster 850w PSU
Single Asus 8800GTX G80
& a Antec P180
Im running windows XP

Basically I have seen many internet claims that on the standard air cooler people are getting 3GHz from the E6600 but all I get at 2.7GHz is either a blue screen or freeze.
Apparently my CPU, Mobo & RAM are all upto the job.......... but unfortunately, i am not!!!
Again I am a complete noob to this so if anyone can explain bullet point by bullet point how to get more from my processor I would be very very grateful.

If I need to do it in the BIOS, I am willing if someone has again very simple terms to explain ;o)