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 Skylake/Kaby/Coffee/Comet/Rocket Lake OC V1, Show off your OC here

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x-1o8-x
post Nov 30 2017, 10:18 PM

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hi guys,

those of you using Asus board to OC your 8700k, what LLC level are you guys using? things have changed alot since I last OC'ed like 7-8 years ago and I'm learning back OC for these new processors.

whats the typical voltage to expect for pushing 5ghz? thanks in advance guys.
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post Dec 1 2017, 01:52 AM

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QUOTE(owikh84 @ Nov 30 2017, 10:59 PM)
Each motherboard's power design is different.
ASUS and other brands have LLC level 1 as the lowest and up to 8 for the highest.
ASRock has it backwards where level 1 is highest and level 5 is the lowest.

On my ROG boards, I chose level 5 because I find it gives the lowest vdroop.
Check few pages back for my 5GHz CPU OC.
LLC5 used, BIOS set 1.30v, load vCore 1.280v Prime95 AVX 0 offset stable.

Typical voltage is around 1.2-1.4v depending on your VID and board of course.

Check out 8700K OC database from Germany: https://www.hardwareluxx.de/community/f139/...ad-1178256.html
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thanks dude, i'll give it a try, i've tried level 2-3 previously @ 1.3vcore but still failing p95 as soon as test starts.
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post Dec 1 2017, 01:43 PM

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QUOTE(owikh84 @ Dec 1 2017, 06:48 AM)
Better check your chip's vid first before pumping any voltage.
For record, my 8700K comes with 1.088v vid.
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do you mean the cpu voltage when it's @ 3.7ghz like the one in the BIOS or when you boot up to windows and it's at 4.7ghz due to the asus MCE?

for BIOS, mine's showing 1.040v while in windows when the CPU gets stressed to 4.7ghz it shows 1.332-1.337

Everything was set to Auto on BIOS btw for the situation above,
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post Dec 1 2017, 05:50 PM

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QUOTE(owikh84 @ Dec 1 2017, 05:00 PM)
VID can be observed when your BIOS setting is set to default.
Hence, in your case your VID is 1.040v which is quite low even lower than my 8700K chip.
Hmm not sure why you need so much vcore but it's likely that the Strix mobo has a weak VRM power.
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I've tried pushing it @ 4.7ghz with 1.32v vcore and LLC lv5 and was able to run prime95 without having any errors, but after a minute or so my speed gets throttled even though my temps are not above 80c.

I get the feeling the VRM is overheating thus throttling is occuring due to that.

do you touch any other VRM settings besides the LLC?
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post Dec 2 2017, 01:11 AM

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QUOTE(owikh84 @ Dec 1 2017, 09:44 PM)
CPU Load-line Calibration [Level 5]
CPU Current Capability [140%]
CPU VRM Switching Frequency [Auto]
VRM Spread Spectrum [Disabled]
Active Frequency Mode [Disabled]
CPU Power Duty Control [Extreme]
CPU Power Phase Control [Extreme]
DRAM Current Capability [100%]
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Thanks for the input, I've tried it and I'm still failing prime95 though I could definitely boot to windows without worrying of crashing halfway now.

considering I'm only on a Noctua NH-D15S and I've not delidded my CPU, I guess this is the limit for now sad.gif
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post Dec 2 2017, 12:37 PM

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QUOTE(owikh84 @ Dec 2 2017, 10:15 AM)
hmm I guess you will need a better mobo to confirm as I saw your VID is quite low so couldn't be your chip is worse than mine.  hmm.gif
Btw, if you're not doing video encoding stuffs you can use Prime95 v26.6 that doesn't have AVX/FMA3 instruction.
It is less stressful but enough for your daily work. It also requires less voltage, so you should get lower CPU temperatures.
The legendary Noctua NH-D15S is a great air cooler that it performs even better than some AIO coolers in the market.
I also have the NH-D15S and the vanilla D15, maybe be will give it a try when I am free.  brows.gif
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heh the default settings is also more than enough for what im doing which is just gaming, i've stopped video encoding for the time being. just thought i'd try to push this processor as far as I can while passing the prime95 stress test.

i'll try playing around with it again tonight to see if i can push it to 5.2ghz cpu-z validation able biggrin.gif biggrin.gif

thanks bro for the settings you gave, it really gave me more idea on what settings i could fiddle around to get more juice biggrin.gif biggrin.gif
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post Dec 2 2017, 07:16 PM

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QUOTE(owikh84 @ Dec 2 2017, 03:05 PM)
I see... My pleasure bro iBenQ.  biggrin.gif
All da best man.
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haha so long never use that nickname already biggrin.gif
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post Dec 3 2017, 12:19 AM

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QUOTE(cstkl1 @ Dec 2 2017, 09:38 PM)
hmm ok thats just the luck of the draw dude but generally most 8700k are at this voltage for 5ghz.. so ure not at the bad end.. Bad ones need 1.4-1.45v

from that 4.7ghz vid on auto.. with asus MCE.. thats ure 5ghz approximately... with AVX offset 2

so u can try 5ghz at 1.32-34 with avx offset 2 load line 5/6

owikh84 cpu will do it at 1.2-1.216v.... with MCE enable 4.7ghz.. on default.

with strix based on owi testing on TUF... expect increase of voltage around 0.03-0.04v.. ( might not be the case with offset -2)
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I tried the settings you suggested above and was able to boot 5ghz @ 1.32v, managed to pull a 5.2ghz @ 1.36v with AVX offset 2 but my windows kinda bugged out with chrome not properly loading and I can't even shut down the PC properly due to the OS not being responsive.

will fickle around to try to get it cinebench stable for now biggrin.gif
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post Dec 4 2017, 01:38 AM

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QUOTE(cstkl1 @ Dec 3 2017, 06:13 AM)
after 5ghz u need to relax ure ram and theres a need to adjust vccio etc..
i would redo a hci every multiplier above 5 before attempting any cpu stress benchmarks
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I've set my RAM to auto during the OC as I don't want it to cause some instability issues, but at 5.2ghz it's pretty much fragile af
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post Dec 5 2017, 03:54 PM

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QUOTE(cstkl1 @ Dec 4 2017, 10:06 AM)
auto wont do.
asus default on z370 is actually tight.

here is the kicker. on p95 i find alot of bsod errors 5.1ghz above are ram/imc related even on fft12.

5.1ghz relaxing rtl/iol passes fft12.
also passes hci.
but then i get some pcie issues ( tested on long stream)
games tested is deus Ex and now my new fav is fc4 with all gameworks enable.
did some tweaks in tweakers paradise and upped dmi/cpu standby voltage. m

5.2ghz again another imc related issue. tweaked some third timings,

5.3ghz was hci/priming with rams at 4200c18@1.3v.. thsts when i killed one of the cpu cores. lol.

pll bandwidth helps but becareful n dont use 6-8 as whats written on the description. default intel spec is 1.2v but asus runs it at 0=0.6v

hope this insight helps. i just backed down to 5ghz@1.2v offset 2 and called it a day. need months to validate above 5ghz since its causing other issues via dmi.

same issues i had with my 7820x when i oced 4.7gh fod ram 4kc17@1.3v. rb/p95/hci doesnt catch other issues as much as actual long session gaming.
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noted bro, thanks for the insight
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post Dec 10 2017, 09:19 PM

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tried adjusting the vcore to offset mode with -0.08v, and for some reason i'm p95 stable @ 4.7ghz with vcore reading around 1.184v-1.216v but when doing it manually i get error'ed on p95
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post Dec 17 2017, 11:42 PM

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QUOTE(owikh84 @ Dec 17 2017, 11:09 PM)
CPU-Z is not a suitable software to test stability of your OC, neither a good software for benchmarking purpose.

For CPU overclocking, the most standard people would go is Prime95, but take note that it is way too much stressful that your cooling can actually handle the heat.

For me, a couple of hours (3 hours minimum) of Realbench or AIDA64 are more representative of real-world applications.
Between these two, Realbench is better since it stresses both CPU and GPU at the same time.

Anything lower than 100c would be safe. Moreover you're using an air cooler, which is less worrying than custom watercooling with PETG tubing etc. Your normal usage at 65c max looks fine though, just need to  retest with a proper stress tool as I mentioned earlier to confirm stability.
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hi owikh,

between prime95 v26.6 vs latest ones, which one would you rather base your overclock settings on?

the temp differences between these 2 versions are quite far apart and not to mention via voltage offset mode one is underload at 1.18v with vdroop and another is at 1.2v with vdroop so i figured i could go lower voltage with the prime95 v26.6 stress test but i'd fail the v29.4 stress test if i were to use the same offset
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post Dec 18 2017, 10:30 PM

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QUOTE(owikh84 @ Dec 18 2017, 06:50 AM)
Previously, I said go for the none AVX-based Prime95 v26.6 if you're not doing video encoding stuffs but it seems like I was wrong.
Nowadays more and more software including games are using AVX instructions. It is suspected that NVIDIA driver also has AVX instructions in it.
Hence, Prime95 v29.4 is definitely a better choice if you don't want to see the CPU speed fluctuating due to AVX offset.
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thanks bro for the input, guess i'll leave it at 0.08v voltage offset for now
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post Dec 19 2017, 10:49 AM

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QUOTE(hafiez @ Dec 19 2017, 09:52 AM)
when I open the intel overclocking utility, the max frequency only show 4.99GHz, never went to 5GHz. in youtube video, I see people getting 5.01GHz, what I'm doing wrong?

the youtuber using the same bios and settings as me. he didn't change any values.

and, RAM only run on its specification? the memory I use stated 2400MHz, when I try change it to the higher number like 3000MHz, it wont boot.

so, when back to bios and change it back to the default values.

hi, how you install/use your thermal paste with NHD15s ?

pea style or spread style?
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i used pea style. however based on my previous experience it doesnt really matter which style you use as long got enough tongue.gif

the 4.99ghz fluctuating to 5.01ghz is quite common I guess btw, that's just how core clock speed fluctuates. RAMs usually run at their stated specs, so maybe in your case it's 2400MHz @ 1.2v, making it go 3000MHz is basically overclocking.
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post Dec 28 2017, 05:58 PM

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QUOTE(reconvision @ Dec 27 2017, 12:50 PM)
Hi guys. I'm new to overclocking. I have overclock my i7 8700k with noctua nh d15 dual fan setup. I'm able to get stable at 4.8ghz at 1.26v in prime95 for 2 hrs. But the temperature is just spiking crazily from 70 to 85. Even in cpu intense game like battlefield 1 & assassin creed origin, temp are also fluctuating from 68 to 84. Is this even normal? Do i really need Aio to run at that kind of voltage?
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that is pretty low TBH, im getting 90c with a D15S and also dual fan setup, are you using the latest prime95?
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post Dec 30 2017, 10:39 AM

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QUOTE(reconvision @ Dec 29 2017, 10:22 PM)
I use prime95 v26.6. What I heard is the new version of prime95 have avx instruction. So I avoid using the new version since most games dont use avx instruction.
what overclock setting are you using now??
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I only have offset of -0.08v to the core voltage @ 4.7ghz and everything else is auto. but yea I'm using the latest prime95 which has avx instruction so my temps are like 90c on core3/4, 1.200v under load.
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post Dec 31 2017, 01:09 AM

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QUOTE(keyo @ Dec 30 2017, 06:08 PM)
if me its ok if under 85 mine also below 90 when gaming
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under gaming i barely get 70c tbh cause not all cores are being under 100% load. for regular 100% load my temps are at 75c or so, though as @x800 pointed out the temps with FPU & cache stress would be the worst case scenario temps so I'd like to improve my thermals based on that biggrin.gif
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post Jan 1 2018, 01:23 AM

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QUOTE(owikh84 @ Dec 31 2017, 01:13 PM)
[attachmentid=9470946]

Alright guys, currently I am testing my 5.0GHz OC on the Hero X with the an air cooler in the form of Noctua NH-D15S (2x NF-A15 fans).
To my surprise, for some reason I need to pump more voltage as compared to my custom loop.

[attachmentid=9470959]
Noctua NH-D15S: 1.328v, avg core temps: 39C Idle, 86C load
Custom loop: 1.280v, avg core temps: 37C Idle, 72C load

Yes that's right, 0.48v difference!  blink.gif

At first I couldn't believe it so I re-tested using back my custom loop again I can confirm that there's no chip degradation in which I am still able to obtain stability at 1.280v under custom loop same like before, I don't know why LOL. rclxub.gif
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that's quite a huge difference and prolly explains why I also had to pump the voltage that high. for the 72c custom loop, how long did you keep the rig under load?
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post Feb 10 2018, 12:54 PM

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QUOTE(owikh84 @ Feb 10 2018, 10:21 AM)
High end rig for sale!  rclxms.gif
It would be better if you could list down the parts included as well as some pictures showing the setup etc.
I also noticed you have a WTS thread separately, perhaps you can put up more details there.
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yup list down the parts pls, wanna drool abit drool.gif
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post Aug 8 2018, 11:31 PM

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QUOTE(wongtheboy92 @ Aug 8 2018, 08:29 PM)
To all 8700k users, which motherboard would you suggest aside from Asrock (i know they are good boards)?
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https://www.overclock.net/forum/attachment....achmentid=99753 you can get some ideas here

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