Recently I've OC'ed my CPU to 3.4 with stable results and reasonable temperatures on full load(66º), running prime95 for around 12 hours.
To accomplish this I set up the following values in BIOS:
CPU Ratio Setting : 8
FSB Frequency : 425
Vcore : 1.418v
FSB Term: 1.30v
DRAM Frequency : 850Mhz (1:1 ratio in this case)
DRAM Timings : 5-5-5-15
Everything else is in Auto.
The problem I have is that I cannot get it to post if I select a higher DRAM Frequency than 850Mhz.
I would like to run my RAM atleast at 1066, which is near its rated frequency(1100) but if I change it it won't boot and I have no idea why.
Does anyone have the knowledge to help me on this matter ?
You are going to need more vCore voltage for 3.4, especially with that VID. Loosen your timings or set your RAM to auto until you get your CPU clock nailed down with the correct voltage and speed.
Thank you for your reply.
It turns out I made a mistake on the vcore I specified above. To achieve the stability I mentioned I have it at 1.425.
So you're saying that in order for me to be able to run my RAM at a higher frequency I need to give my CPU more vcore?
I have my Q6600 G0 @ 3.60ghz with ram running at 800mhz perfectly fine. Like i said on another post, increasing ram will not give you much of a performance gain. My vcore is at 1.47v and i am having no issues, AND, im using a nvidia motherboard so im doing quite well. I think you should leave the ram at stock settings and just go for the overclock