OC tweaks & help on ROG Impact

[crazymilk]

Hey all

Currently tweaking and trying to get a safe milk overclock on my 4670k.

Quick question regarding adaptive voltage, I believe that while testing stability it should be OFF but for everyday use it's ok to have on. Please could somebody confirm????

Also where is the setting to turn on/off in the BOIS?

Lastly what about C1E, speedstep and EIST? Should they be on or not?

[HiVizMan]

Hello Crazy

OC is not too complex at all. The key factors are what can your CPU clock like, what are your cooling solutions able to cool and what do you want to do with the system.

First one, CPU - no two CPUs are the same so you will need to find out what your CPU is like. You can start out with the voltage on auot and simply increasing the multiplier. Then using CPUz see what your idle voltage is and when under load see what your load voltage is. If your system is able to pass your stress test of choice, I am currently using ROG Realbench the benchmark as my yardstick, two passes and I am happy to proceed.

Voltages can then be set later on once you have a ball park idea where your CPU is in the grand scheme of things.

Next is cooling, if your have good cooling and I have no idea as there is no hardware list included in your post. Then your OC ceiling is higher due to the better cooling. Heat is a big issue with modern CPUs like the Haswell.

Finally, the needs of your system will dictate what kind of stability you need. Folding requires different levels of stability to simply running a word processor.

My advice is read as many of the Maximus OC guides they all apply to your board as the bios is very similar.

Then do stuff, try for your self and see what works.

Tip Keep an eye on temps at all times, let temp be your guide.

[crazymilk]

Thanks for the info

I have the system able to boot at 1.25v with a multi at 46. Looking around that should mean it is a decent chip. See quote below.

"Now, I’ll share a secret imparted by the folks at ASUS who gave several reviewers some tips on overclocking the retail stepping Haswell chips: Set Vcore to 1.20 V. Set all cores to 46x (which would be a 4.6 GHz overclock), save & reboot. If the system boots past the UEFI and either begins to load or, ideally, makes it into the OS and is stable, you have a 50th percentile or greater chip on the Haswell overclocking-ability bell curve. If it won’t at least boot there and make it into the UEFI, you probably have less than a 50th percentile chip. You can expect chips in the lower 50th percentile to top out in the 4.4-4.5 GHz range at 1.25 V.



If your chip will boot at 4.6 GHz and 1.25 V, that’s very good. It means you have at least an average chip. If it will boot at 4.6 GHz and is stable there, then you may have an above average chip. The best chips will be able to do 4.8 GHz stable at 1.25 V. Our sample did 4.8 GHz, but at 1.3 V and on a custom water loop. Using 1.3 V will likely put a chip out of the air cooling / AIO water cooling thermal envelope. Temperatures in all of these scenarios, from the dog 4.3 GHz chips up to the good 4.8 GHz chips, will always be in the ~90°C range. That’s just the nature of Haswell. With the VRM on-die, think of Haswell as Ivy Bridge plus 10° C."

I am just trying to find out how to turn the adaptive voltage off on this board and also wether to turn off the C1E, speedstep.

[HiVizMan]

Yeah I am very familiar with that quote, I was actually with Raja when we were binning the CPUs for IDF.

If you want to turn it off it is easy. Actually I doubt that it is even turned on unless you did so.

F5 to set defaults and enter.

Then set your multi and memory

Decide what method of voltage control you want to use, you have options - manual, offset and adaptive.

You know your voltage now so easy to set.