Hi I new to Oc’ing but did some reading and was spurred on by a claim of running at 1600Mhz FSB even though my board is only supposed to support 1333Mhz. You cab see the video here http://www.youtube.com/watch?v=r3uns6n-PDo
My problem is that my system will not clock over 299 x 9 giving a max of just under 2.7Ghz. I am currently using Asus AI suite. I have also tried doing the over clocking in the bios with exactly the same results … at 299 x 9 all is ok …at 300 x 9 … I get a boot failure … once I got to windows desktop but soon got the BSOD.
I am aware of the temperatures that must not go above 70c .. at 2.7Ghz I see 39c idling … at the end of passmark test I see 47c max
If anyone can help it would be appreciated. Hopefully below I have included all the info. needed.
Asus P5N-D with latest 1401 bios
Q6600 G0 2.4Ghz
2 x 2Gb Corsair DDR2 7 @ 400 MHz
Win 7 64bit Home Premium
PCIE frequency is 131mhz
All voltages are set to AUTO in the bios as below.
Vcore at 1.625v set by Asus AI suite seems high … although the actual at idle is 1.15v available range in the bios is 0.83 to 1.6v
Dram Memory is 1.85v range 1.85 to3.11
HT voltage is set to Auto available range 1.2 –1.96
NB chipset is set to Auto available range is 1.2 – 1.76
SB chipset is set to Auto available range is 1.5 – 1.86
The FSB memory clock speed is set to linked in the bios
I had a similar problem too with my dual E2200 over clocked from 2.2 GHz to 2.86 GHz currently. I tried doing it more as other people with the same CPU got it up to 3.2 GHz but every time it failed to start windows and the computer crashes within 5 minutes. Later on using core temp I found out that bus speed on the motherboard was 1044 Mhz and the max that is possible is 1066 Mhz hence when pushed to a higher CPU clock the bus speed was greater than the motherboard specification thus kept crashing no matter how much voltage I gave it. In short its not the voltage thats limiting your over clock its the motherboard. I was able to get my over clock stable just giving 0.1 volt boost to the CPU. I would never keep it on auto cause it will take in more voltage than it needs to which is bad for the CPU reducing its life cycle. I recommend control the CPU voltage manually and test it that way you ensure your CPU lasts for longer. Hope This Helps : )