stock i7 7700k high temperatures (with Noctua NH D-15 2fans)

ANDREY-L

Prominent
May 6, 2017
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510
Hello, guys! I've been watching forum for topics but didn't find exactly my situation. If i missed something, please let me know by putting here a link, please!

I've built new system on i7 7700K with Noctua NH D-15 (noctua box thermal paste was used).
MB: Gigabyte (AORUS) Gaming 5
RAM: Kingston 2x8GB 2133MHz
Power: Corsair RM750i
Case: Thermaltake Core v51 (3 stock 120mm fans)

The situation is: BIOS shows idle temperature around 38-40C and CPU works on 4.5GHz; after starting windows AIDA64 Extreme Edition v.5.90.4200 shows 33-35C and CPU works on 1GHz.

Next: starting AIDA stress test and CPU switches from 1GHz to 4.5GHz in half of second and temperatures rise up to 60C in 20-30sec, then 1-2 min left and temperatures reaches 83-85C... stress CPU longer then 5min seems to me very dangerous (but in this 5min no throttling)

In this situation there is no chance to overclock my CPU even up to 4.7GHz. :(

Comparing to my previous old friend i5 750: overclocked i5 750 from 2.66GHz to 3.7GHz was heating not more 85-87C during 30-45mins of stress test and worked stable.

For me it's very disappointing situation and it seems like i've spent lots of money for some....****....!!!

Can anybody help me with that? I heard lots of people face with this problem, but not with Noctua D-15. Others have 90C in 4.9-5.1GHz...what's the difference?

Questions:
1. BIOS works on stock settings, nothing i changed. Do i need to do some changes in BIOS? what exacltly? Core voltage? Multiplier? Something else?

2. Do i really need to delid my CPU to change thermal interface? I suppose that stock i7 7700k with its stock thermal paste should work ok on 4.5GHz locked and in oc mode with 100-200-300MHz plus with no overheating at least...?! and actually i didn't planed to delid my CPU.
3. OR is it really [strike]good[/strike] normal temperature (around 83-85C) in stress test in stock 4.5GHz for i7 7700k...??? I'm afraid about it cause it costs a lot... and what about overclocking...?
4. OR i mount my cooler in wrong way....to strong i mean? could it effect in bad way?

Wish you no overheating and stable GHz ;)

Waiting for you advises and opinions. Thank you very much!
 
Solution
Set voltage to manual and lower it.

Run stress test and find lowest stable voltage running chip at stock and work your way up from there.

I just installed mine last night 7700k and nhd15s (the single fan version) my board at stock settings with only XMP enabled is running cpu at 1.312 vcore on auto. Temps under small fft prime95 where 75c at an ambient temp of 73f.

WorldGuinessComments

Commendable
Feb 24, 2017
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1,690


DO NOT,I SAY AGAIN DO NOT DE LID YOUR CPU!!!IT WILL PROBABLY DIE!!!Ad why would you overclock a 4.2ghz cpu?Is't that enough??As for high temps,alot of 7700k users are experiencing this,imma try to find a fix
 
1. Was the thermal paste pre applied to the cooler?
2. If not, how did you apply it onto the cpu?
3. Does the case have good airflow?
4. How high are your room temps?

Those temps are too high for the 7700k and delidding it is pretty much mandatory if you plan on overclocking it. There's a tool made for delidding cpus safely called the "Delid die mate".
 

ANDREY-L

Prominent
May 6, 2017
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Thank you for replying!

For me probably 4.2-4.5GHz is good enough in daily use, but I feel sad cause I payed for i7 with K and it's made for overclocking, for me it's not very logical to pay for top 4-cores CPU and MB with z270 chipset and not push even 200-300MHz up; more than that, I saw results as 5.1GHz and 94C maximum intel stress test without using delid! but actually overclocking for me isn't so critical as temperatures in stress test at stock clocks. I suppose cpu will just burn during 30-60min of Aida stress test, or probably less than 30min. That's the main point.


There was no pre applied thermal paste on cooler, I put a drop on center of CPU and mount cooler . Hope that I just put too much paste) check it out after few days.)))

I can't actually say anything good or bad about airflow in case, cause it's not possible physically to put away all cables back to rear panel, probably it's possible, but I need time to try something out (few day later I'll be back at home).
All in all it's not bad I think cause 2intake fans and 1 exhaust fan. 2 noctua fans use the same direction as an exhaust fan. Top panel is free of any fans, just with magnetic dust filter
Temp in room... normal I suppose... 23 (plus minus 2C) probably)

Could it be that temps are so high cause of motherboard adaptive voltage control in 100% usage ?
 

BigBoomBoom

Commendable
Apr 9, 2017
548
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1,360
It's hard to mess up mounting Noctua SecureFirm 2.0, but make sure you tighten the cooler correctly by working on both spring screw alternately until you can't screw them any further. Is that high temp a temporary spike or a persistent one? There's no problem for a temporary spike, even with delidding and aggressive custom loop people still report high temp spike (not a persistent temp!).
 

ANDREY-L

Prominent
May 6, 2017
5
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510
Hi everyone!

I remount cooler and reapplied thermal paste on cpu less than before and pounded it thin layer. Change BIOS preset to i7 7700k to 4.6GHz. as a result: 85C max on 3rd and 4th cores at 1.392v (sometimes 1.42v) @ 4.6GHz (Stressing CPU and FPU in AIDA 64; with FPU off temperature is 15C less). In Idle temperatures are about 34-35C. Voltage is AUTO

I locked 4.5GHZ on 4 cores and turned off all energysaving techs and result is 80C max at 1.380v (sometimes 1.392v) @ 4.5GHz during stress test. Voltage is AUTO

Most of the time average temperature of cpu is 75-78C during stress test. I started to think that it's normal values for 7700k.

Temperatures change by jumping up and down sometimes...but i heard it's ok for 7700k. For example for one core in few seconds monitoring: 72-69-71-65-80-67-61-79C. Sometimes spread reaches 15-25C...In idle it could be 33-35-32-55-33-32-35-31-60C (values in Intel R Extreme Tuning; AIDA shows stable 3-4-5C spread)

The last question for me is: does i7 7700k really need so much voltage????? or i can lower it for lower temperatures???

 

biglizard

Respectable
Apr 1, 2016
314
3
1,860
Set voltage to manual and lower it.

Run stress test and find lowest stable voltage running chip at stock and work your way up from there.

I just installed mine last night 7700k and nhd15s (the single fan version) my board at stock settings with only XMP enabled is running cpu at 1.312 vcore on auto. Temps under small fft prime95 where 75c at an ambient temp of 73f.
 
Solution

Barney6262

Honorable
Oct 20, 2013
989
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11,360
I run my 7700k @5GHz with 1.280v

1.380 is probably overkill but it depends on the chip. If you are getting those temps with that voltage you are doing well, my I7 would literally melt the board if I set it at those voltages XD...
 

ANDREY-L

Prominent
May 6, 2017
5
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Guys, thank all of you very much! I tried to lower voltage down to 1.25v and i saw 65C max during 7mins. Didn't try to run it much more, don't think it's nesessary. So, probably it would be ok to run it at 1.2 or lower, but need time to experiment.
Anyway, i'm glad with that fact!

Especially thanks to biglizard. Problem solved!

P.S.
Idle temperatures still the same 35-38C if 4.6GHz locked on 4 core and all energy saving functions are disabled. Anyway....65C at stress test is good) will try to lower it a little bit more)
Intel R extreme tuning shows 56-58max at stress test! Simply beautiful)))))

BUT! I have one more question!
What if i set up lowest voltage where CPU is ...probably...stable....i mean it passes stress test and work good and so on....Will be any problems in future with CPU and it's better to set up voltage a little bit more than lowest possible??
 

biglizard

Respectable
Apr 1, 2016
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1,860
I cant stress this enough, you must fully stress test your OC.

At a minimum Realbench for a couple of hours. Your temps will be higher in this test and it may fail and that is part of the process.

This testing is what you will use to find your max clock and lowest vcore stable.

Ultimately its your choice, you can put in the work now and be sure or regret it later.
 

smokefest

Commendable
Oct 4, 2016
8
0
1,510
I agree.

You need to stress test for hours with multiple stress applications, I suggest OCCT and REALBENCH

An overclock can easily looks stable. If you only boot launch the stress test for 5 min and call it a day, the day you will need full cpu power for a while for a task or a game whatever, you might bluescreen or crash etc... better to test and keep in mind try to get under 85-80 for temps in stress tests and under 80 all the time for normal gaming or using of the computer, best is to get under 80 in the stress tests, and under 70 for real usage !!!
 

ANDREY-L

Prominent
May 6, 2017
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510
Ok, i get it about stress test!
Thank you very much!

I tried to lower voltage down to 1.26v and probably cause of adaptive voltage in bios it crashed after 2 hours of gaming... 1.27v works good for now)

But in stress test voltage was 1.22v - 1.88v, mostly 1.2v, and i think 4.6GHz should work good at 1.2v, after stress test off voltage again rise up to 1.248-1.26....and changes in common tasks in this range...sometimes lowers down to 1.2v...

Anyway) i think i'll find time to experiment with voltage and switch off adaptive voltage mode.
What are the main points i should consider during this future experiments? Could you give some advises? cause i'm not pro in overclocking :)

P.S I'm not trying to find as lowest voltage as possible and set a record, i just need "good cold point" of cpu teperature for now (probably 65-67C and 1.27v is ok, but something tells me that it could lower (voltage and temp) :) ) and i need some reserve to increase clock in future, if it will be nesessary) for now 4.6GHz is ok for gaming and common tasks