What settings should be enabled/disabled in bios for overclocking? (Talking about speedstep, c states etc.)

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I'm new to overclocking and I know the basic stuff about overclocking but I've found some conflicting information about which features in bios to enable/disable for overclocking, such as Intel speedstep, C states and spread spectrum. Some people are saying turn them all off, others say leave them on. Can someone shine light on this?

I have a i5 6600k and a ASUS Z170-M PLUS mobo and for starters I only wanted to do a light OC (maybe 4.2ish GHz) and maybe push it further later. However I only have air cooling and get around 55-60 degrees Celsius at full load on normal clock speeds (my air cooler is Cryorig m9i)

Also, are there any other tips/things I should turn on/off in bios and other places? Any help is appreciated
 
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Mikel_4

Intel speedstep and spread spectrum got nothing to do with OC, my guess is yours have 6+1 phase power so you need to take little bit slow.
You'll find C-state at CPU configuration, Disable it. C-state relate to how your CPU use power at base frequency to turbo boost, usually by disabling C-state/CPU energy saving feature the turbo boost setting (3.9GHz) limit will automatically be disable.
Known stable CPU VID for 6600K is 1.3V max, this will make your CPU is drawing ~ 99 watt and rise temperature to 70C with M9i, aside from...
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youssef 2010

youssef 2010

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Try increasing the CPU Multiplier first without touching the Voltage and see if the overclock you achieve is stabble. I used the same method to overclock my old 3770k. Don't worry, the worst thing that can happen is that you'll have to clear the CMOS
 
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Thanks for the answer but I was leaning more towards the whether I should disable or keep enabled specific features for power saving etc. in the bios. I'm familiar with the actual process of overclocking
 
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Mikel_4

Mikel_4

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Intel speedstep and spread spectrum got nothing to do with OC, my guess is yours have 6+1 phase power so you need to take little bit slow.
You'll find C-state at CPU configuration, Disable it. C-state relate to how your CPU use power at base frequency to turbo boost, usually by disabling C-state/CPU energy saving feature the turbo boost setting (3.9GHz) limit will automatically be disable.
Known stable CPU VID for 6600K is 1.3V max, this will make your CPU is drawing ~ 99 watt and rise temperature to 70C with M9i, aside from +- 10C error threshold software monitor temperature reading you'll have to assume that your CPU may already at 80C.
To prevent you from further time consuming of CMOS reset, you should start by +2 multiplier > 0.05V CPU VID > +20% RPM CPU fan(s) cooler. After you on the 4.1GHz, test it stability with gaming or transcoding, when you reach unstable preset (freeze or unresponsive input) then you know the previous preset is what your build limitation be.

 
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