Quote Originally Posted by Nano2k View Post
Are you sure your power supply is up to the task, I had to change mine (700W), also I had to up the other voltages not just the CPU core.
I'm using a silverstone 1000W power supply. It's worked well in another system in the past, so I think it's Ok. What other voltages did you increase?

I played around with all of the bios settings mentioned in this thread and other p8p67 overclocking guides I've found, and I was never able to get into windows at 4.6ghz or above using up to 1.475 vcore. Soooo, I returned my 2600k and got a 2500k. I'm at 4.9 ghz now (with the exact same hardware setup as before), but still working on stability. I think it will need about 1.41ish vcore to be linx and/or prime stable at this speed for this new chip. I guess not all these 2nd gen intel chips are cut out for 4.8ghz+ overclocks.

A question for everyone here- has anyone had to raise VccSA for 4.9ghz+ stable overclocks? Some guides suggest raising VccSA in tandem with VccIO when using faster memory, tighter timings, or increasing the bclock. I'm running my memory at 1333mhz with loose timings, so I haven't increased VccSA or VccIO yet. However, I do have some decent ddr3-2000mhz sticks I'd like to use after cpu stability testing, and I'm wondering if folks have had to increase VccSA and or VccIO to run 8 GB of ram (2 x 4gb sticks) at 1866mhz or above.