OC'ing i7 6700k on MSI M5

Admiral Huddy

Admiral Huddy

Admiral Huddy

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Got myself an i7 6700k. It's been awhile since I've done any overclocking so might be a daft question. Anyway, do I disable Turbo Boost if I increase the CPU multiplier / ratio?
 
Admiral Huddy said:
Got myself an i7 6700k. It's been awhile since I've done any overclocking so might be a daft question. Anyway, do I disable Turbo Boost if I increase the CPU multiplier / ratio?
Click to expand...

Here's a rough guideline that I followed on my i5 6600K, I'm on an Asus board though it shouldn't make a lot of difference on your MSI one:

Set the CPU core ratio to 45 / 4500Mhz / 4.5Ghz depending how it's displayed in the BIOS - on all cores. You could also start off at 4.6Ghz but this will require more determination when it comes to voltage, plus I always feel that starting at 4.5Ghz is more than reasonable - especially when you're finding the sweet spot of being stable on the lowest voltage as possible.

Set a manual CPU vcore at a starting point voltage of 1.325V. If you're stable after a few hours of stress testing then lower it to 1.300V, again if stable lower the vcore again with 0.010V increments until it's not stable.

That is about it for now, leave everything else to Auto / no other changes made. I was going to mention about tightening up the voltage & stability with the LLC (Load Line Calibration) setting within the BIOS too, but if I am not mistaken (if another member can clarify), the LLC option is not available on MSI boards.

On my 6600K I found that I am fully stable with 4.5Ghz @ 1.250V. 4.6Ghz is easily achievable but requires 1.300V and generates much more heat in my experience, plus for me the difference between 4.5 / 4.6Ghz is very minor or if anything - not noticeable.

Liam.
 
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Thanks for that :)

So you left the Turbo Boost option alone? My over thinking is that if I was to change the CPU ratio to 45, then any turbo boost on top of that would cause insatiability?
 
Admiral Huddy said:
Thanks for that :)

So you left the Turbo Boost option alone? My over thinking is that if I was to change the CPU ratio to 45, then any turbo boost on top of that would cause insatiability?
Click to expand...

Yep - I also had the same assumptions as you too when I delved into Skylake when researching into my new build a little while ago, and I haven't overclocked since the Haswell days. Turbo / C state options / power saving features within the BIOS are left alone.

Obviously the way the overclock works nowadays is purely under the work load / stress / turbo phases of the CPU so the full CPU speed i.e. 4500Mhz is only utilised during these conditions. During idle the CPU clock itself will still downclock to around 800Mhz, as the Windows 10 balanced power profile plays a role in the power saving of things on the CPU too. The CPU voltage however will still remain at the full manually set figure i.e. 1.250V as this is constant but can also be lowered at idle now using Adaptive Voltage within the BIOS (Don't worry about this for now though when getting started with overclocking).

Liam.
 
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