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Skylake Overclocking Guide [With Statistics]

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post #11391 of 11399 (permalink) Old 12-03-2018, 05:49 AM
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Hi, Due to being ill, I've only just updated my Asus 7170 Deluxe to 3801 from 1801, and am having a bit of difficulty maintaining a stable overclock.

I am using an offset of -65 with LLC 5 which gives me a reading of 1.424v when running the AVX version of Prime95, and 1.376-1.392 when running the non AVX version.

I have run the AVX version for 8 hours, and the non AVX for 10 hours with no problems.

I am still getting occasional crashes when the system is not stressed, it is difficult to track them down to a specific source.

My initial thoughts are VCCIO or VCCSA, or that somewhere in the range of voltages in the C-states, there is something the CPU doesn't like with a particular load.

VCCSA reads 1.208 in HWiNFO

The VTT (VCCIO if i recall correctly?) reads 1.344v in HWiNFO, which is much higher than I used to have it, it is set to Auto in the bios.

My previous manual setting of 1.16250 was a little higher than what previous UEFI versions set to AUTO, but I have jumped so many versions.

I believe 1801 that I had been using was the first release that enabled SPEED SHIFT that allowed the processer to clock up and down much faster which had a knock on effect to overclocking stability so whilst this was in its teething stage, I disabled C-states and ran my rig at a single voltage using Adaptive OC instead of Offset to keep it stable.

All other OC settings are set to Auto.

For the moment, I'm going to try running with Window's High performance power profile that locks the clock speed, but not the voltages, see if it is any more stable.

i7 6700K @4.6GHz - Asus Z170 Deluxe - Noctua NH-D15 - Gainward Phoenix 1080 GLH 8GB @2050 & 11000 - 16GB Gskill RipjawsV DDR4 @3200 - Corsair HX850i - Nanoxia Deep Silence One - Samsung 950 Pro NVMe - Seagate FireCuda 2TB - WD RE4 2TB - WD Caviar Blue 640 - ASUS PG348Q 34" Ultrawide - Logitech G19 - Logitech G502 - Sony STR-DN1050 Receiver - Q Acoustics 2000i 5.1 speakers.

Last edited by Deders; 12-03-2018 at 06:00 AM.
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post #11392 of 11399 (permalink) Old 12-06-2018, 11:56 AM
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Ok so I added another 0.005v 3 days ago and it seems to have been stable.

I am typing this partly as a final test for sods law to prove me wrong, and partly to help anyone else who comes across it.

Max voltage still reads 1.424v when running the AVX version of Prime95, although temps are a little higher.

i7 6700K @4.6GHz - Asus Z170 Deluxe - Noctua NH-D15 - Gainward Phoenix 1080 GLH 8GB @2050 & 11000 - 16GB Gskill RipjawsV DDR4 @3200 - Corsair HX850i - Nanoxia Deep Silence One - Samsung 950 Pro NVMe - Seagate FireCuda 2TB - WD RE4 2TB - WD Caviar Blue 640 - ASUS PG348Q 34" Ultrawide - Logitech G19 - Logitech G502 - Sony STR-DN1050 Receiver - Q Acoustics 2000i 5.1 speakers.
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post #11393 of 11399 (permalink) Old 12-10-2018, 01:17 PM
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Well it was ok for a few days, but since then it has randomly started to crash, giving different reasons every time.

I'm beginning to wonder if memory training is a factor here since the system is stable until I fully power it off and switch it on again

For now I have set it as close to the voltages I had before I updated the bios, (Adaptive voltage no longer works the same way so I have to approximate it with offset instead), switched off all C-States, and set it to high performance mode in windows.

If this doesn't turn out to be stable, is it worthwhile exploring different Vdroop settings. 6 made the voltage a little too rock solid allowing for no droop, 5 seems to be what most people are happy with, but I know my CPU needs more voltage than most. Does anyone have any insight on this?

i7 6700K @4.6GHz - Asus Z170 Deluxe - Noctua NH-D15 - Gainward Phoenix 1080 GLH 8GB @2050 & 11000 - 16GB Gskill RipjawsV DDR4 @3200 - Corsair HX850i - Nanoxia Deep Silence One - Samsung 950 Pro NVMe - Seagate FireCuda 2TB - WD RE4 2TB - WD Caviar Blue 640 - ASUS PG348Q 34" Ultrawide - Logitech G19 - Logitech G502 - Sony STR-DN1050 Receiver - Q Acoustics 2000i 5.1 speakers.
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post #11394 of 11399 (permalink) Old 12-10-2018, 10:32 PM
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3 year update!
I haven't experienced any crashes but I ran realbench overnight to test anyway. I keep my cpu @ 4.7 since 4.8 requires significantly more voltage, somewhere around 1.35. My cooler isn't the best either. I have a Silver Arrow ITX and I prefer to run a dead silent fan curve which works fine at 4.7. I've disabled speedstep since I've read windows 7 doesn't switch the frequency as fast I just keep it continiously at 4.7

6700k @ 4.7, ring 4.7, fclock 1GHz
1.285 vcore manual
LLC6
Asus Maximus VIII Gene, 3201 (no meltdown update)
32GB G.Skill RipjawsV 2400MHz C15
Windows 7 (meltdown disabled)
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Last edited by Xcel; 12-10-2018 at 10:43 PM.
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post #11395 of 11399 (permalink) Old 01-26-2019, 10:13 PM
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I am working on overclocking my 6600K? What is safe voltage for Skylake? I am at 4.5 right now with a .1 + Offset and its been stable. In Windows it shows Vcore as 1.25V has been stable so far.

I have an MSI Z170A Tomahawk AC Mobo but can't seem to find an LLC setting?

Thanks for any help!

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post #11396 of 11399 (permalink) Old 05-06-2019, 02:21 PM
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Username: Aerandir14
CPU Model: i7 6700K
Base Clock: 100MHz
Core Multiplier: 49
Core Frequency: 4.9GHz
Cache Frequency: 4,7GHz
Vcore in UEFI: 1.44
Vcore: 1.44
FCLK: 1000MHz
Cooling Solution: Delidded resealed with LM. Custom WC with 2 x 280mm radiators
Stability Test: OCCT 4.5.1 5h

Batch Number: L536B265
Ram Speed: 2666 14-16-16-34
Ram Voltage: 1.35V
Motherboard: Maximus VIII Hero
LLC Setting: LLC 5
Misc Comments: Ambient temp: 21°C
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Last edited by Aerandir14; 06-03-2020 at 03:56 PM.
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post #11397 of 11399 (permalink) Old 08-03-2019, 05:29 AM
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Quote: Originally Posted by Aerandir14 View Post
Username: Aerandir14
CPU Model: i7 6700K
Base Clock: 100MHz
Core Multiplier: 49
Core Frequency: 4.9GHz
Cache Frequency: 4,7GHz
Vcore in UEFI: 1.44
Vcore: 1.44
FCLK: 1000MHz
Cooling Solution: Delidded resealed with ML. Custom WC with 2 x 280mm radiators
Stability Test: OCCT 4.5.1 5h

Batch Number: Unknown, will check and edit later (I don't have the box anymore)
Ram Speed: 2666 14-16-16-34
Ram Voltage: 1.35V
Motherboard: Maximus VIII Hero
LLC Setting: LLC 5
Misc Comments: Ambient temp: 21°C
hy.. can you get 5Ghz?

i am Delidded to with liquid metal. and stable 4.9Ghz 1.45 vcore in bios llc 6 max temp during test realbenc max 65 avg 63
3200 14-15-15-34 2T
asus z170 deluxe
i7 6700k
i safe for daily use to get 5Ghz when raising vcore voltage like 1.5v?
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post #11398 of 11399 (permalink) Old 06-03-2020, 03:59 PM
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Quote: Originally Posted by pegadroid View Post
hy.. can you get 5Ghz?

i am Delidded to with liquid metal. and stable 4.9Ghz 1.45 vcore in bios llc 6 max temp during test realbenc max 65 avg 63
3200 14-15-15-34 2T
asus z170 deluxe
i7 6700k
i safe for daily use to get 5Ghz when raising vcore voltage like 1.5v?
No, I couldn't get 5 GHz stable

Even 1.45 seems pretty risky to me, I settled at 4.8GHz @ 1.37V.
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post #11399 of 11399 (permalink) Old 06-23-2020, 08:13 AM
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I'm trying to overclock this Intel I7 6700K CPU on an MSI Z170A Krait Gaming X3 motherboard, with 16 GB DDR4, proceeding in this way.

I am increasing the cpu ratio and the vcore, leaving the RAM below the original frequency to exclude them from the test result (after I do a final test by setting the XMP profile).

The only thing I would try more is the deactivation of the settings that make dynamic frequency and voltage and the energy saving settings (but it is only a test, because in the final test I will have to activate them as they interest me).


I would like to ask you these questions:

1. Which Stress Test do you recommend to use to test the stability for the overuse in dailyuse of this CPU?



2. In addition to the CPU Ratio and Vcore, can you change other settings to try to overcome instability during the stress test? (for example the other voltages all n cars, or other bios settings)


es. If at [email protected] it is stable and at [email protected] it is unstable, can I just try to increase the vcore?



3. In the event of instability, can increasing BCLK and decreasing CPU multiplier help, get worse, or is it the same?


4. Core Override CPU okay as a vcore mode?


5. Does the Ring Frequency leave it in default which is around 4100 or decreasing it can affect the stability?

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