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.

Is it thermal throttling?
What are your temps idle and under load at 4.5GHz?

@owikh84 will you be getting the Maximus X Formula as it seems available in MY already?

Wonder if it will be able to give you the same clocks with lower voltages

Wanted to get Maximus X Code bus seems like wont be available in MY

Hi bro, due to time constraints I've rejected ASUS MY's offer for reviewing the Formula few weeks ago, perhaps later when I become available again.
All of the ROG series mobos have 10-phase power delivery design, so they should be able to give you the same CPU OC and voltage.

Oh i see...kinda interested to get it review tho haha

Actually i also wanted the nice looking armor on code, without going all put for a formula

I gotta feeling if i go for formula i will want custom water cooling also later

One thing will lead to another lol

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?

Not sure why ASUS MY doesn't bring in the Code this time. It's a good board for those who want to have the appearance of the Formula but don't plan to go for custom loop and don't want to pay extra for the EK hybrid VRM heatsink/wb.

Hi bro, welcome to the OC club.
Your temps look normal at such CPU frequency, vCore and cooling.
D15 is the best air cooler that money can buy and it outperforms most AIO coolers. During my testing, with push pull fan configuration it performs on par with Cooler Master"s Nepton 240m AIO. Some higher-end AIO coolers especially those 360mm will win by 1-5 degrees Celsius.
Wait for Corsair H150i 360mm AIO cooler to be released on Dec 31. I read Vortez's leaked review (before it went down) they claimed that it beats the NZXT X62 by 14 degrees C. But be prepared to pay around RM 1k for the price lol.

Thx bro! Ok at least i know the temp i get is within the normal temp at such vcore. Coz some ppl claim to be running 5ghz on air 24/7 make me have high hope of reaching there but it seems with our hot weather , i do not wan to run my cpu at low 90 Celsius everyday xD. Now i should decide either to finally venture into aio or delid.

The vCore is depending on the CPU, quality of motherboard (MOSFETs, BIOS, etc), cooling (the lower the temperature, the lower the voltage required).
Good thing about air cooling compared to regular AIO is that the air from fans will blow onto the VRM heatsink, reducing the VRM temp. Some AIO coolers such as Cryorig A series are specially designed to have an additional fan to help chilling the VRM.
Of course, delid is the best way to go if you're aiming for higher OC at lower temp, if you don't mind losing the warranty.

that is pretty low TBH, im getting 90c with a D15S and also dual fan setup, are you using the latest prime95?

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??


This post has been edited by reconvision: Dec 29 2017, 10:23 PM

avx instructions can generate quite a bit more heat. I believe that's why your temp is a lower than the other guy.

try one run with prime95 ver that supports avx and see, that'll show a sort of worst case scenario for the temps

This post has been edited by x800: Dec 30 2017, 08:14 AM

Yeap. Thats when u need avx offset for the rescue. Btw anyone experiencing avx bug whereby even idle at desktop trigger the avx offset ?

This post has been edited by reconvision: Dec 30 2017, 09:34 AM

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.

Ya. Today i found quite a lot of ppl with d15 are reporting almost the same temp underload at 75-80 in game with no avx instructions. So i can said that our temp is normal and the other way around is to delid it which will bring our 8700k to 60c underload. Tempting to do it but i still dont want to void the warranty yet . The tim from intel is just garbage.

if me its ok if under 85 mine also below 90 when gaming

This post has been edited by keyo: Dec 30 2017, 06:08 PM

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

Am very new to OC and have been following guides on YouTube.
While I think I may have done as much as I can with the GPU OC using After Burner and Kombuster am still unsure on the CPU OC and stress test.
Some guide would be most appreciated.

My Rig that was just built:
Gigabyte Z370 Aorus Gaming 7
Intel i7 8700k
GTX 1070 Aorus
Noctua U14S

AVX offset has been a debatable issue since Kaby Lake. Some said it's a bug while others saying otherwise.
It could be that you have certain OS software running in the background that's using AVX instructions, triggering the AVX offset thingy. Here's the list of AVX-based software: https://forums.anandtech.com/threads/what-c...d-avx2.2498660/
Some games might be using AVX instructions, or NVIDIA driver itself is implementing it: http://www.overclock.net/t/1641867/avx-offset-bug
This doesn't happen with Skylake-X though or he needs more games to test: http://www.overclock.net/t/1643198/coffee-...ks-while-gaming
One guy said this bug is triggered when C-states are enabled in the UEFI: http://forum.gigabyte.us/thread/2704/psa-avx-offset-bug-real
I personally don't use AVX offset because I want my OC to be all out for worst case scenarios.

Check out the OC guide in the top post of this thread for GIGABYTE's Z370 GAMING 7. It will guide you OCing your 8700K to 5GHz.

But I don't think you can comfortably run 5GHz OC with your current air cooling, unless you hit silicon lottery with a really low VID (stock voltage with everything defaults) and delid. So it really depends on good is your CPU which varies from one chip to another. Get a bigger and better cooler like the NH-D15/S or 240mm+ AIO.

It is advisable to check your VID through the UEFI first before proceeding for OC. Check your CPU core temps with your CPU running at stock clocks with Realbench v2.56, then only proceed for 4.7GHz on all cores and so on.

For record, my 8700K has 1.088v VID and it's capable to do 5.0GHz running under a high-end custom loop at 1.280v on Prime95 v29.3 custom blend 1344K.

wow! thanks for showing me the link as well. Appreciate your work Yes I solve it by setting avx offset to zero now. so i can have 4.8ghz all day .