Overclock assistance needed

[FlightSimDude]

Good day overclockers. I've spent quite a bit of time reading all over the web about overclocking the Sandybridge 2600k chips. So much so I've gotten rather confused. I'm in good hopes by consolidating my time here, it will be well spent for best end results. I'm in need of experienced assistance if I may ask.

My Specs:

Asus P8P67 Pro

2600K

G.Skill Ripjawz 1600mhz 8-8-8-24 (2x4)

Koolance Exos 2.5, CPU370, 1/2 inch Tygon tubing

I've been working with the current settings. But as soon as I start prime95, the system locks. I think it's due to too low of a cpu voltage?

Settings are as follows:

AI-OC Tuner = Manual

BCLK = 100.0

Turbo = Per core (not in OS)

Ratio = 48

INT PLL Voltage = Auto

Mem Freq = DDR3-1600mhz

EPU/PSM = Disabled

Load Line Calibration = Ultra High

VRM Freq = Manual

VRM Fixed Freq = 350

Phase Control = Extreme

Duty Control = Extreme

CPU Voltage = Manual

CPU Manual Voltage = 1.360

Suggestions would be helpful.

Thanks Guys

 

[Grizzly]

Looks like it. Try starting at 1.4v, if that works knock it down until you find the lowest stable voltage.

If that doesn't work then it's more likely a software problem, have you tried running prime95 as an administrator?

 

[SieB]

That voltage is not too low more like too high, I can get 4.7ghz @ 1.42v. You should try doing what grizzly said and to try starting at 1.4v and work your way back. If that does not work try working from 1.4v upwards in increments of .50 of a volt e.g 1.4v - 1.45v - 1.5v etc.

Make sure you dissable turbo boost and speedstep in CPU Power management and set the multiplier to 4.8 in there.

Also with LLC set to ultra high and Phase and Duty control set to extreme your voltage will go higher than what you set it in the BIOS but leave the settings as they are because they improves stability and prevents V Droop.

 

[BigIan88]

Also some systems hate Prime95, I use LinX which wont crash if the system is unstable but instead come back and say an error was found whilst finding X number so you can restart and increase your voltage/reduce your overclock accordingly.

200-250 runs of 1024 should be more than enough to stress test your OC

 

[FlightSimDude]

Thanks for the suggestions guys. Surely there was something amiss. I was not getting good results with the settings I had. Also, I had forgot about turbo and speed stepping. That's got to be the answer to the rise in clock speed changing from stock 3.4, and then jumping up to 4.8. Not a solid number that stayed.

Latest of LinX is v0.6.4, and is working great.

Thanks again guys.