HELP! Overclocking i7 920 w/ DX58SO

Specs:
i7 920, currently at stock 2.66GHz
Intel DX58SO motherboard
OCZ Gold 1333MHz 9-9-9-20 1.65v RAM, currently at 7-7-7-16 and 1066MHz 1.5v
750watt Zalman PSU
4870 1GB


So I've been changing the settings in BIOS in order to do a minor OC from 2.66GHz to 3.0GHz...it works fine when I restart, go into windows, and passes hours of Prime95. However, when I shut off my computer for more than 10minutes and then restart, it doesn't boot up successfully (just the fans spinning and nothing on the screen). I need to restart the computer 8-9 times before I can successfully boot up.

Now initially, I've was thinking it was a voltage problem...that undervolting it prevented the bootup. However, I brought the CPU core voltage up to 1.2v, and it still wouldn't boot. On 2.66GHz stock speeds, I have my CPU voltage set to ~1.08v, and it uses ~1.05v in windows, while dropping to ~1.03v running at load...and it passes Prime95. So 1.2v for 3.0GHz would've been more than enough.

I've been thinking it is my RAM that I might need to tweak? I have OCZ Gold 1333MHz RAM with 9-9-9-20 timing and 1.65v. In BIOS, I have it running at 7-7-7-16 and 1066MHz with 1.5v for stock i7 speeds. After I set the BIOS to 3GHz, I left the timings in place, so it was still 7-7-7-16 but running at 1200MHz with 1.54v.




Could improper RAM timing prevent the computer from booting up? What about not setting the i7 QPI voltage or other voltages?

Does anyone have a DX58SO or similar RAM so I can compare settings and maybe try your settings on my rig?

Here are pics of my settings:


*in this pic, the BIOS has reverted most of the settings back to default after unsuccessful bootup











CPU running at under-voltage for stock speeds:

I worked for Microcenter and was able to procure the i7 + intel motherboard + windows vista for ~$315 through an Intel program. I should've sold the DX58SO and gotten a P6T but I was too lazy to do so... >_< Although I did read the the DX58SO was a "decent" motherboard and was almost as good as the UD3R and P6T at OCing...

Anyone have any setting suggestions for RAM timings, QPI core, etc?

I had a similar problem. "I need to restart the computer 8-9 times before I can successfully boot up."

When the computer sits there with the black screen. Simply turn off the back of the Power Supply, wait ten seconds, then turn it back on and boot up the computer. If that work's I may have the solution. But, I experienced similar problems on my Q9550 quad.

Messing with the RAM in every little way that would drive you INSANE.

I had to turn up my voltage and downclock my memory to be able to fix the prob of boots

Well if your motherboard is DX58SO. It can run your memory up to 1600MHZ, so if I was using 7-7-7-16 @ 1333MHZ, i'd prolly use 9 9 9 24 T2 @ 1333MHZ. I think you should buy better RAM. And it will solve your problem.