i5-6600K Road to 5GHz Overclocking

skullbringer

New member
So I am currently at overclocking my i5-6600K on an Asus Z170-A.
Coming from X79 and berfore that Z77, I still dont quite fully understand the Z170 bios and all of its components. So I need your help...

1. Is there a way to prevent the cpu from going back to stock clock at the desktop? I have intel speed step and c-states disabled, and turbo enabled. Is there another setting I need to configure?

2. I am currently stuck at 4.7GHz @ 1.4V. It passed 5 minutes of AIDA64 stress test and stayed under 65C. (H100i GTX) What Voltage settings apart from the cpu core/cache voltage are worth rising to improve system stability? I played around a bit with pch, vccio and system agent voltage, seemingly without any big affect, didnt go over 1.2V on any of them though. What exactly are all these voltage settings and which should I adjust?
 
and you would be correct. is this a problem? I am looking for as much support as possible.
And as TTL in his skylake review suggested, I came here for oc guidance. ;)


Update the BIOS and make sure you just disable one at a time. I was only doing speedstep and mine was stuck at the overclock all the time.

Volts you need to work you wayup with.

5GHz I very much doubt will happen (unless youve won the lottery)

Id start at 1.25v manually set in the cpu/cache volts.

Manually set your ram inc volts

set the pch to 1.1v

go from there tbh, are you just multi clocking or going to be a man and use the bclk and cache too?
 
Update the BIOS and make sure you just disable one at a time. I was only doing speedstep and mine was stuck at the overclock all the time.

Volts you need to work you wayup with.

5GHz I very much doubt will happen (unless youve won the lottery)

Id start at 1.25v manually set in the cpu/cache volts.

Manually set your ram inc volts

set the pch to 1.1v

go from there tbh, are you just multi clocking or going to be a man and use the bclk and cache too?

Already running on the latest bios.
Seems like I found my max multi at 47x100 @ 1.4V. PCH is basically the chipset, right? I'll try the 1.1V with it.

Of course, I'll work the bclk as well! ;)
I just managed to run 8x290 @ 1.4V, trying to get the 300
 
so 8x290 @ 1.4V seems to be a limit, running 3min of AIDA64.

8x300 wont even boot.

Are there other settings worth adjusting? Like cpu current capability or cpu power phase control?

Also is there a benefit of using a dedicated gpu to take load of the cpu ?
 
is there a vcore/cache voltage I should not go past?

with my x79 rig I always thought as long as the cpu cores are below 80C, I can raise the voltage. But people on LTT were freaking out about 1.45V @ 65C...?!
 
Update the BIOS and make sure you just disable one at a time. I was only doing speedstep and mine was stuck at the overclock all the time.

Volts you need to work you wayup with.

5GHz I very much doubt will happen (unless youve won the lottery)

Id start at 1.25v manually set in the cpu/cache volts.

Manually set your ram inc volts

set the pch to 1.1v

go from there tbh, are you just multi clocking or going to be a man and use the bclk and cache too?

So, I've been at it for the last 20 hours or so and this is what I finally managed to get stable out of my i5-6600K:
185 MHz x 26 = 4810 MHz Core, x 24 = 4440 MHz Cache @ 1.45V

RAM: 3145 MHz 16-18-38 @ 1.353V (G.Skill Ripjaws4 2 x 4 GB rated at 16-18-38 @ 1.35V)

All settings above were configured manually and ran stable for 30 min of OCCT., see below

Some additional notes:
- PCH was set to 1.2V, otherwise the CPU would not initialize @ more than 4.6 GHz.
- CPU current capability was set to 140%, CPU power phase control to Optimized.
- Intel speedstep and turbo were turned off, BUT turbo gets automatically enabled at a BCLK of 140 MHz or lower. So I stayed above it for a static core clock.
- Max load temps were 88°C, idle temps are about 35°C. 14nm seems generate an insane amount of heat under load compared to idle.
- It would not boot @ 4.9 GHz, even with 1.55V. Either there is a wall or I did not find the right setting to adjust.
- Using a dedicated GPU made no difference.
- System specs: Asus Z170-A, Corsair RM750i, Samsung SM951 nvme, Corsair H100i GTX, Zotac GTX 980 Ti reference

vHvyMFu.jpg

vHvyMFu
 
Last edited:
hey skullbringer - thanks for that. I'll be getting my 6600k in the mail shortly, and putting it on my Asus Z170 Deluxe.

I have a bigger AIO, the Deepcool 360 (3-fan) - and I plan fully on cranking it up.

I havent killed a cpu in years, and I want to push it to the very limit.

I'll see in three days how my experience compares to yours - and I'll report back here -
 
So, I've been at it for the last 20 hours or so and this is what I finally managed to get stable out of my i5-6600K:
185 MHz x 26 = 4810 MHz Core, x 24 = 4440 MHz Cache @ 1.45V

RAM: 3145 MHz 16-18-38 @ 1.353V (G.Skill Ripjaws4 2 x 4 GB rated at 16-18-38 @ 1.35V)

All settings above were configured manually and ran stable for 30 min of OCCT., see below

Some additional notes:
- PCH was set to 1.2V, otherwise the CPU would not initialize @ more than 4.6 GHz.
- CPU current capability was set to 140%, CPU power phase control to Optimized.
- Intel speedstep and turbo were turned off, BUT turbo gets automatically enabled at a BCLK of 140 MHz or lower. So I stayed above it for a static core clock.
- Max load temps were 88°C, idle temps are about 35°C. 14nm seems generate an insane amount of heat under load compared to idle.
- It would not boot @ 4.9 GHz, even with 1.55V. Either there is a wall or I did not find the right setting to adjust.
- Using a dedicated GPU made no difference.
- System specs: Asus Z170-A, Corsair RM750i, Samsung SM951 nvme, Corsair H100i GTX, Zotac GTX 980 Ti reference

vHvyMFu.jpg

vHvyMFu


1.45 is a LOT of volts
 
1.45 is a LOT of volts

I used to cringe giving that to an AMD FX 8. It will kill a Skylake. Maybe not right away but over time the chip will degrade. People saw a lot of that on Ivy and Haswell, tiny dies don't like a lot of volts.

I mean for god's sake, I can get 4.4ghz stable out of my 5820k at 1.24v :eek:
 
Yeah, you would need a delid and a a good water cooling setup to do more than 1.4v.

Even with my H110 I don't want to go that high.

Water cooling is a maybe.. depends on how the try chip reacts. At that high of volts you'd need to ln2 or phase change to get stable temps. OP is pretty lucky
 
Overclocked

I have seem to over clock my CPU at 5ghz and completley stable. For some reason I was able to do this air-cooled with a Hyper Evo 212 and a voltage of 1.3
 
I have seem to over clock my CPU at 5ghz and completley stable. For some reason I was able to do this air-cooled with a Hyper Evo 212 and a voltage of 1.3



Hmm either you have hit the silicon lottery big time, or something is not right with what is showing in my opinion.
 
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