CPU overclocking help

DM1000 · Aug 30, 2016

I'm trying to do a moderate overclock with my i5 6600k and was hoping to get around 4.4-4.5 this is my first overclock and would really appreciate it if some one walked me through it, links to good videos and articles would be helpful as well

Specs;
Cpu: i5 6600k
Mobo: Asus z170 p
Cpu cooler: hyper 12 evo
OS: Windows 10

I have a lot of questions and the bios/uefi intimidates me.
1. First off is their any settings I need to disable/ tweak when overclocking, I think their might be some Asus turbo stuff enabled but i don't know what to check.
2. What should the stock and a safe overclock voltages be?
3. Should i set all the cores to sync or do them individually?
4. Flck and Blck, from what i've read id rather not mess with the Blck but Im still unsure if it is ok to bump the Flck up to 1 ghz from the stock 800 mhz
5. What stress tests, monitors, and other misc. software is recommended before i start? I was looking at Prime95 but read that it was overkill and some bug that could fry your system so is this recommended. Right now i have hardware monitor and Cineabench

I'll try and post whatever screen shots people need to see

viper666 · Aug 30, 2016

The is no "proper" way of doing it which applies to all CPU's, all of them support various frequencies at various voltages (each Intel CPU has it voltage range written on it's retail box). You basically want to take your 3.5Ghz to 4.5Ghz, which is not very easy to do, there is no risk of damaging if you do not let the voltage setting on "auto" which will increase to ridiculous values at times.

DM1000 · Aug 30, 2016

I don't have to have it at 4.5 if it can't get that far, basically I just want to squeeze as much performance without going over a safe/moderate voltage

ElectronGuyzz · Aug 30, 2016

I've got i5 6600k with asus z170 pro gaming and got easilly overclocked cpu to 4.6ghz with voltage of 1.320 .

Only things you'd need to do is in Ai Tweaker and in there set Ai Overclock Tuner to XMP and BCLK Frequency to 100.00.
After that set CPU Core Ratio to Sync All Cores.. Core Ratio Limit to 44 or 45 as you wanted to get 4.4 or 4.5ghz.
Set CPY Core/Cache Voltage to manual mode and put 1.300 as CPU Core Voltage Override.
So now you can save these settings and reboot your computer and test the clocks out.

Faux_Grey · Aug 30, 2016

Easy way to do it is as follows. (depending on your CPU cooler.)
You do not want your load temp to go any higher than 80* celcius. (not terribly dangerous but stability issues arise above 80)

Download intel extreme tuning utility.
Use the "Stress test" cpu function, set the time for a few hours and let it run.
While the stress test is running, we can lazily overclock our cpu and have it fail as soon as it's unstable, as opposed to us constantly stopping and starting the test.

While the stress test is running, it'll allow us to see our max temps, stability and CPU frequency in the chart at the bottom left.

You can start by setting the core voltage on CPU control to 1.15, this is not high by any means but is a good starting point.
Slowly start increasing the core voltage by increments of 0.05, so: 1.15-1.20-1.25-etc-etc.
Do this until your CPU reaches an acceptable temperature. 60* Celsius is good place to stop, If you're new to Overclocking don't push the voltage any higher than 1.3v. Danger Will Robinson! Danger!

Now that your voltage temperatures are relatively normal, you can now increase your core clock speed, bump it up by 1x ratio on the slider for all cores (4 active cores)
Keep doing that until your PC crashes. Keep an eye on the temperatures, increasing clock speed also marginally increases heat output on top of voltage.

Remember the voltage/ratio you had when it crashed, now apply those same settings, but 1x less multiplier ratio for stability.

Run the stress test again.
Now slowly reduce the voltage until your PC crashes again.
Add 0.15 to the core voltage and presto! You should have stability at the highest attainable thermal limit for your CPU cooling solution.

I find that sometimes games will tax the CPU in different ways and you might get a crash/Bluescreen, if that happens it doesn't hurt to add 0.05 to the core voltage until the problem goes away.

If you're having issues, I would recommend you "lock in" your CPU cache/ringbus ratio to the stock ratio, an "AUTO" setting for cache could cause it to try and overclock with the CPU.

For reference my Cache ratio on my CPU is at 39x while my core ratio is at 50x. They both overclock differently.

ElectronGuyzz · Aug 30, 2016

Faux_Grey :

Easy way to do it is as follows. (depending on your CPU cooler.)
You do not want your load temp to go any higher than 80* celcius. (not terribly dangerous but stability issues arise above 80)

Download intel extreme tuning utility.
Use the "Stress test" cpu function, set the time for a few hours and let it run.
While the stress test is running, we can lazily overclock our cpu and have it fail as soon as it's unstable, as opposed to us constantly stopping and starting the test.

While the stress test is running, it'll allow us to see our max temps, stability and CPU frequency in the chart at the bottom left.

You can start by setting the core voltage on CPU control to 1.15, this is not high by any means but is a good starting point.
Slowly start increasing the core voltage by increments of 0.05, so: 1.15-1.20-1.25-etc-etc.
Do this until your CPU reaches an acceptable temperature. 60* Celsius is good place to stop, If you're new to Overclocking don't push the voltage any higher than 1.3v. Danger Will Robinson! Danger!

Now that your voltage temperatures are relatively normal, you can now increase your core clock speed, bump it up by 1x ratio on the slider for all cores (4 active cores)
Keep doing that until your PC crashes. Keep an eye on the temperatures, increasing clock speed also marginally increases heat output on top of voltage.

Remember the voltage/ratio you had when it crashed, now apply those same settings, but 1x less multiplier ratio for stability.

Run the stress test again.
Now slowly reduce the voltage until your PC crashes again.
Add 0.15 to the core voltage and presto! You should have stability at the highest attainable thermal limit for your CPU cooling solution.

I find that sometimes games will tax the CPU in different ways and you might get a crash/Bluescreen, if that happens it doesn't hurt to add 0.05 to the core voltage until the problem goes away.

If you're having issues, I would recommend you "lock in" your CPU cache/ringbus ratio to the stock ratio, an "AUTO" setting for cache could cause it to try and overclock with the CPU.

For reference my Cache ratio on my CPU is at 39x while my core ratio is at 50x. They both overclock differently.

He has a nice cooler, i am sure that it can't let CPU go to 80 degrees . I've got the same cooler and on stability test its only like around 55degrees

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