How to overclock D975XBX2 and e6300?

Well I have successfully overclocked it to 2.5ghz and it seems stable. I cant seem to go higher though.
My settings are as followed
cpu vol- default
fsb- 1.350 (default)
mch- 1.525 (default)
host clock freq 358

memory down to 533 from 800 (to mimic 1.1)

Now ive tried pushing it more from 2.6-3.0 but got no where. I have upped the cpu vol, fsb to from 1.35 - 1.5. mch to 1.6. ram to 2.0 from 1.84

I have tried almost every combination with those numbers and always got a failed post. Is my PSU holding me back being 450 watts?

Any help would be appreciated.

Did you try loosening the RAM timing? Like say 5-5-5 15 or 5-5-5 18?

No, I don't think you have an issue with your PSU. I believe the board has limited OC capabilities compared to other boards. I have a PC P&C Silencer 750W but still have problem with the board, for which I'm asking for help right now on the forum (I've started another threat in this topic, see "Intel OC'ed D975XBX2 Drops From 3.4GHz Down To 3.3GHz").

Anyhow, these are my settings for running the D975XBX2 with C2X6800 @ 3.42 GHz before getting into a little trouble that forces me to reduce the FSB from 285 to 275 (down to 3.3 GHz):

CPU Voltage override 1.3875 V
FSB Voltage 1.40 V
MCH Voltage 1.55 V

CPU Multiplier 12

Memory Overrides <Manual>
Reference Frequency <Default>
Memory Frequency DDR2-800
Memory Timings 4-4-4-12
Memory Voltage 2.2 V

I notice you leave the all voltages at their default values. I think you need to increase a notch on the voltages to help stabilizing your OC'ed system. Did you try to loose the RAM timings like flabbergaster has suggested?

Keep me posted how it works out for you.

Have u set ur pcie frequency 100 (FIXED) and PCI till 33. and increase one notch the default Vcore and fsb

My timing stock is 5 5 5 18. I did try to change it to 15 after your suggestions and bump up the fsb and vcore a little to and set it to 2.7ghz...still wouldnt not boot. It looks like 2.5ghz is my limit, whicj still seems like a good overclock from 1.86ghz.

I also tried setting the pcie to 100...101 to be exact, it doesnt give me the 100 option, 32 for the other number also, no other option.