Air Flow and stock i7 7700k temp

Toggle sidebar Toggle sidebar
L

lefatichedisisifo

Prominent
Sep 3, 2017
16
0
510
Hi! I Built a new pc in a corsair 400c, with an i7 7700k cooled by a noctua nh-d15s. At the moment the cpu is on stock 4.2-4.5 turbo, with cpu cooler and just the default case fans, intake front 140mm and exhaust back 120. In idle temp is 38°c, but in game cpu reaches 83/85. I used the thermal paste in bundle with noctua , I thought it was a good air cooler... Is it possibile that the problem is the single front intake? Also i noticed that the hot air flowing out the gpu(a gigabyte gtx 1080 g1) flows right in front of the heatsink...
 
Solution
B


Okay thats unfortunate.

What I've been trying to get at here is, it seems from what I've been reading is that on some MSI boards when XMP is enabled CPU OC PLL is being overvolted. Setting this value to 1.130 when Mobo is defaulting to 1.20 or higher is having a positive effect for many.

Here is what I am referring to https://intel-openport-v7.hosted.jivesoftware.com/thread/110728?start=1035&tstart=0
Sort by date Sort by votes
M

mdd1963

Titan
Jan 14, 2006
16,617
1,735
81,240
32C would be a typical idle temp with 24c inside ambient temp, based on my own 7700K with a standard full size NH-D15; certainly, one could add a degree onto the idle temp for every degree of increased ambient temperature. (not possible to have 28C idle with 30C indoor temps)
 
Upvote 0 Downvote
B

biglizard

Respectable
Apr 1, 2016
314
3
1,860


NH - D15S is among the best of the air coolers, but as with any air cooler you need to feed it cool air.

Noctua TIM is some of the best available.

I'd bet my bottom dollar that more case air flow will help, if not solve your problem. If I were you I'd buy a couple of Noctua NF-A14 for the front. As mentioned above, need to check vcore, if on auto MB may be applying to much voltage.

My NH - D15s was pulling heated GPU air causing higher cpu temps, three Noctua NF-A14 mounted in the front of my Define S solved this.


Take a look here, http://www.overclock.net/t/1476618/water-to-big-air-question#post_22020875

Specifically,
" Keep in mind your case needs to flow more air than components do. It isn't so much how many fans but how well they flow air through the case. If component fans move more air than case fans move through case components are using their own heated exhaust to make up the difference and case heats up. Good rule of thumb is 25-50% more case cfm than component cfm but well tuned airflow can be almost equal equal."
 
Upvote 0 Downvote
L

lefatichedisisifo

Prominent
Sep 3, 2017
16
0
510


Yep it could be, I'm waiting for another 140 front fan to see if it resolve the problem
 
Upvote 0 Downvote
L

lefatichedisisifo

Prominent
Sep 3, 2017
16
0
510


here in Italy has been a very hot summer but last days have been fresh, I think indoor temp now is 22/25°c .
I can accept to delid IF I oc, but not on stock! :)

Voltages are :
2i8jjau.jpg
 
Upvote 0 Downvote
MrN1ce9uy

MrN1ce9uy

Judicious
Aug 20, 2009
6,955
639
35,890
Voltage isn't too bad; although it says 1.160V (mine says something like that; MSI mobo) AUTO will go higher. I like to set mine manually and saves a few degrees C under load. I use 1.225V but you could probably go lower. I also moved my setup from a case with 2x120mm intakes to 3x120mm intakes and saw a few more degrees lower temps.

I'm using a Cryorig H7 and I'd say my average gaming temp is around 71C with 1.225V vcore with enhanced turbo 4.5GHz on all 4 cores. So your temps are much too high for whatever reason. Maybe it's the heat form your GPU, I have a GTX 1070 but it probably stays much cooler than your GTX 1080. My average GPU temp is 58C.

You sure you didn't put too much thermal paste?
 
Upvote 0 Downvote
L

lefatichedisisifo

Prominent
Sep 3, 2017
16
0
510


I'll wait to see what happens when I'll receive the second front fan, if temps will be still high I'll try to use less thermal paste! I used a quantity of almost 2 "grain of rice" of thermal paste at the first try and at the second. When I dismounted the heatsink after the first time the thermal paste was spread reaching almost the borders of the chip cover. Turbo is at 4.5 on all 4 cores also on mine
 
Upvote 0 Downvote
B

biglizard

Respectable
Apr 1, 2016
314
3
1,860


What is VCORE and CPU OC PLL voltages in windows?
 
Upvote 0 Downvote
L

lefatichedisisifo

Prominent
Sep 3, 2017
16
0
510


How can I read those values?

Cpu-z shows a vcore of 1.256 under prolonged heavy load, but I can't find the cpu oc pll voltage
 
Upvote 0 Downvote
B

biglizard

Respectable
Apr 1, 2016
314
3
1,860


Cpu-z shows a vcore of 1.256 under prolonged heavy load, but I can't find the cpu oc pll voltage [/quotemsg]

You'll be able to see it with HWINFO64, https://www.hwinfo.com/download.php.


 
Upvote 0 Downvote
M

mdd1963

Titan
Jan 14, 2006
16,617
1,735
81,240
80C+ is very warm for gaming, so, if the TIM/heatshield interface is not marginal from the box (we can certainly believe that swings of 5C might be possible/common), then either the case has very restricted airflow, ambients are too warm, the paste application is too thick or too little, or the reading is wrong, or , a combination of the above.

With 23-24C indoor temps, and control panel/power profile set to Balanced, I'd expect 30-32C ambients in Windows idle, meaning, browser open, cpu only at 800 MHz or so, nothing really happening. (IF any tasking is occurring to ramp up the clock speed, then all bets on ambient cpu temps are off, as any real tasking can nearly instantly cause jumps in clock speed from 800 MHz to 1200 MHz and up....)

We can rule out restricted airflow by completely opening the case in a 24C room...; right after bootup, and after all intial update checks, virus scans, cloud storage logins/updates complete, temps should stabilize if/when clock speed settles down to 800 Mhz, assuming on a balnced power profile. (I am assuming no one thinks they can set High Performance profile, sit at constant 4.5 GHz all day at only 30C.... :) )
 
Upvote 0 Downvote
B

biglizard

Respectable
Apr 1, 2016
314
3
1,860


Can you post another screen with motherboard sensors?

I had to crop the first half to show these sensors.
Should look like this,
d0Ju28s.png
 
Upvote 0 Downvote
L

lefatichedisisifo

Prominent
Sep 3, 2017
16
0
510
Yep, MSI z270f carbon. I tried to make a little bit of undervolting at 1.250 and 1.225 but intel burn test freezes and black screen so I'll wait to see if the situation get's better adding the second front fan
 
Upvote 0 Downvote
B

biglizard

Respectable
Apr 1, 2016
314
3
1,860


Okay thats unfortunate.

What I've been trying to get at here is, it seems from what I've been reading is that on some MSI boards when XMP is enabled CPU OC PLL is being overvolted. Setting this value to 1.130 when Mobo is defaulting to 1.20 or higher is having a positive effect for many.

Here is what I am referring to https://intel-openport-v7.hosted.jivesoftware.com/thread/110728?start=1035&tstart=0
 
  • Like
Reactions: PwNix
Upvote 1 Downvote
Solution
L

lefatichedisisifo

Prominent
Sep 3, 2017
16
0
510


Uhm Biglizard I could set it to 1.130 via msi command center, but I have to disable auto xmp too ?
 
Upvote 0 Downvote
B

biglizard

Respectable
Apr 1, 2016
314
3
1,860


I don't think XMP needs to be disabled.

But if it does. Timings, speed and dram voltage could be entered manually to maintain ram clocks.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom