I have to say going in that overclocking this motherboard and CPU combination is about as easy as it can get. The 2600K CPU is an amazing piece of hardware, and the P67 FTW is certainly a great board to pair up with it. I'll update this post with further results as I get the clocks higher, but I will start with a 4.8Ghz overclock and explain how I got there.
I began by reading Jacobs guide which is a must read for the first timer, if nothing else it gets you pointed in the right direction. When I first began to overclock this combo I set the vCore to the suggested 1.3v but quickly realized that amount of voltage was not necessary for early testing. Heck, I was able to get to 4.0Ghz on stock voltage! The current 4.8Ghz overclock has still not warranted a CPU Voltage above 1.3v as set in BIOS. The voltage does climb a bit higher under stress testing because of the "Without Vdroop" setting I use, but the highest I have seen registered is 1.317.
Here is how I set the BIOS up for the 4.8Ghz clock. Main Overclocking Screen
CPU Advance Configure Sub Menu
- CPU Multiplier = 48
- Vdroop = Without
- Internal PLL Voltage Overide = Enabled
- CPU Vcore = 1.30v
- Dimm Voltage = As per Manufacturers Specs, in my case 1.5v
Memory Configure Sub Menu
- EIST = Disabled
- C1E Support = Disabled
- CPU C3 Report = Disabled
- Turbo Mode = Enabled
- Memory Multiplier = As per your memory's speed rating, in my case 1866
- Speed Profile Select = Custom Profile
- I always set the following parameters manually and let BIOS's auto detection set the rest. Make sure and set as per manufacturers specs for your memory. Also make sure you enter each channel and set the values as described. If you do not set the values for each channel you risk the possibility of having them be different which will cause all sorts of stability problems.
- tRFC Command Rate
I ran a 20 pass run of LinX to ensure stability, here is that screen shot. I used E-Leet to bump the BCLK setting just a tad so CPU-z would read a CPU speed of 4.8Ghz.
Either later tonight or tomorrow I'll be trying 5.0Ghz and higher, it'll be interesting to see how far this setup will go. Stay tuned!
<message edited by Lvcoyote on Sunday, July 24, 2011 2:59 PM>