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

why when i test prime 95 29.3 its drop to 4.6ghz if prime 95 26.6 its ok 5ghz
avx i put auto tq

hmm... couldn't be that ASRock set -4 as the AVX offset by default.
Inside Windows, you can check it through software like XTU or probably ASRock's own utility.
Inside UEFI, you can manually set it to 0 in case you want to disable this function.

If uefi avx setting i put 0 its became auto
Now i avx 1
Multiple 51 when prime its become 50

This post has been edited by keyo: Dec 16 2017, 10:53 PM

vid 1.104v
bios 1.38v
avx 1
multiply 51

This post has been edited by keyo: Dec 17 2017, 01:01 AM


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No zero offset option is odd. Auto being -4 offset is more weird
It sounds like the AVX offset is not working properly, for me it's a big bug LOL.
Too bad I don't have any ASRock Z370 board with me, maybe you should contact ASRock for clarification haha.

one noob Q guys....

I'm on 8700k, Z370 gaming k6, crucial ballistix sport ddr4 ram. for cooling, I'm using D15s.

I just play around with the OC tune settings which came with the mobo. I've selected the highest to 5GHz.

with the preset, the mobo set the cpu V to 1.4, and I play around by bringing it down to 1.2v.

at first I received BSOD, return to BIOS and change the value slowly upward, until I get 1.248v with no BSOD.

for ram, I didn't change any values. but it runs on 2400MHz.

for temperature, when stress test it hovers around 80c - 93c.

if I use CPU-z "stress cpu" button, it plays around 80c on load.

on normal usage, idle on 33c-37c and 65c on load.

am I doing anything wrong or I'm exposing the chip to danger?

This post has been edited by hafiez: Dec 17 2017, 09:53 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.

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

29.4 have avx ft3 more stressful need more voltage
Mine 26.6 need 1.33v 29.3 need 1.38v
For gaming enough with 26.6 if video editing or else nedd 29.3

This post has been edited by keyo: Dec 18 2017, 12:20 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.

do u delid ur proc?

Btw, for the cpu V, why need until 1.3/1.35v ?

No delid, my chip is doing 5GHz @ 1.28v under custom wc with max temps never go above 90c.
Every chip was born unique, meaning each CPU comes with its own stock voltage (VID).
If you're lucky enough you will find a good chip, while some others might get bad chips with high VID.
It's all about draw of luck, silicon lottery.

thanks bro for the input, guess i'll leave it at 0.08v voltage offset for now

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?

This post has been edited by hafiez: Dec 19 2017, 09:55 AM

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

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.

How about the CPU frequency showed in CPU-Z?
I would disable BCLK spread spectrum in UEFI to prevent/minimize the BCLK fluctuations

I see, thanks bro. yes, the ram spec is 2.4ghz @ 1.2v.


ok already turn off the BCLK Spread Spectrum.

the difference is, I can get 5g or 4995mhz most of the time

in cpu-z, it shows 5000.0 MHz 50x100mhz

sometimes 5001,5002.

in AIDA it shows 5.00Ghz

only in intel extreme utility it barely go above 4995mhz. maybe it just a rounding problem, nothing serious.

edit: what is your proc cache value? 43 or 48, is it ok?

This post has been edited by hafiez: Dec 19 2017, 01:08 PM

Should be fine as CPU-Z is showing 5.0GHz.
Just ignore that value in XTU, sometimes I will see 4.99GHz as well. The benchmark score is more important, but expect to get lower score with slower RAM speed like DDR-2400.
My cache is slightly overclocked to 4.5GHz from 4.4GHz.

Hey guys, new here in overclock. Just got one question.

Does cpu OC 4.5ghz i7 6700k can downclock to stock clock 4.17ghz on its own? Already check that in bios and stated the multiplier is 42.