CPU cools down too slowly?

Toggle sidebar Toggle sidebar
C

conductorslayer

Reputable
Aug 21, 2014
11
0
4,510
I'm experiencing an interesting temperature-related issue with my new build. I've got a single EVGA ACX GTX 770, an an Intel i5 4670k with a Hyper 212 Evo cooler. I'm using MSI Afterburner/Rivatuner for temps because I like the on-screen display.

Most of the time, my idle and load temperatures are solid (I mean, I think they are, but tell me if I'm wrong). The CPU cores idle around 30-40 c (closer to 40 nowadays but my ambient temp is about 30c right now so that's not so bad), and under load I've never seen a core break 65c. My GPU idles at 28-31c and under load it tends to run 55-70c (I've seen it hit 75 for demanding games, but never 80, and I understand 80 would still be okay).

The problem comes when I've just finished playing a game for a while. Within 5 minutes, my GPU cools down to normal idle temps, ~30c. But my CPU seems permanently hotter, idle, until I turn off my computer for a few minutes.

For example: I boot up my computer. Idle CPU temps ~33c. I play a game for an hour, during which my average CPU temp is ~55-65c. Then I turn off the game.
even 15 minutes later, my CPU is averaging, idle, around 40-45c. This has happened every time I've played a semi-demanding game for over a half hour. What could be causing this problem, (is it a problem? not sure how long haswell cores usually take to cool down), and how can I address it?

Thanks very much.
 
Sort by date Sort by votes
E

enamak

Honorable
Jan 24, 2014
392
0
10,860
Haswell CPUS can get very hot and your room temperature is very hot!
I think its because your cpu cooler . 212 Evo its a nice entry level but his fan is not that good, if i were you i would replace the fan of the EVO, or even buy 2 good fans to do push/pull on the cooler. You can also try to put a better thermal paste like MX-4. And how many fans you have in your case?
 
Upvote 0 Downvote
C

conductorslayer

Reputable
Aug 21, 2014
11
0
4,510


If I change fan speeds in my BIOS when I've already set a fan curve in System Information Viewer will that cause problems? Or will increasing my minimums in BIOS not cause an issue?
 
Upvote 0 Downvote
C

conductorslayer

Reputable
Aug 21, 2014
11
0
4,510


I've got 3 fans in the case, and can't afford another cooler right now, but I've done some tweaking in my case and with fan speeds, and now it only takes about 5-7 minutes for my fan to return to normal temps.

For reference: my idle temps are 30-35c. While running a game average temps are 45-60c. After playing a game, temps are around 40-45c while idle, but by the time 6 minutes have gone by idle temps are back to 30-35c.

Is this more normal? I'm not sure how long it usually takes CPUs to cool down after high loads.
 
Upvote 0 Downvote
E

enamak

Honorable
Jan 24, 2014
392
0
10,860
Its kinda normal because when your playing ur gpu mobo and cpu get hotter, so the air inside csse its hot, when u stop playing case fans need time ro replace the hot air with cold one, and thats not bad dont worry, as long as cpu doesnt go over 65 or 70 degrees ( i try to mantain mine below 50 tho)
Ur fine :)
 
Upvote 0 Downvote
Karadjgne

Karadjgne

Titan
Ambassador
Dec 26, 2012
30,739
4,559
142,790
Push/pull on an EVO is not only useless, its hazardous. Other components on the motherboard rely on the 'bleed' coming from the cooler to provide some airflow for temp regulation. The VRM's in particular. Add a pull fan on a tower and the 'draw' from that fan eliminates the 'bleed' so things like OC are less stable. It's one of the problems usually associated with liquid coolers. The second fan will only reduce the cpu temps 1-2° so, pretty useless.

Op, I'd suggest if you are still nagged a little by the long temp drops, get MSI Afterburner or even Asus suite fan expert or similar. There is settings there to regulate the speeds of fan spinup/spindown which will enable you to slow the speed of spindown on cpu/gpu which means your fans will take longer to come down to idle speeds, cooling off the components faster.

For reference, my idle (oc'd) is 32-34, gaming 50-60, prime95 is 69-70, furmark is 80, room is @26°C and takes @ 13 seconds to drop cpu from 70 to 34, and 20 seconds to drop gpu from 80 to 35 (idle+2). I'd say off hand that your case fans aren't tweaked enough or correctly
 
Upvote 0 Downvote
C

conductorslayer

Reputable
Aug 21, 2014
11
0
4,510


I'm actually already using MSI Afterburner but I can only find fan controls from my GPU; are there CPU controls buried in there somewhere that I'm missing?

For my CPU fan I use the system information viewer software for gigabyte motherboards, but I can't find anything about spindown speeds.
 
Upvote 0 Downvote
C

conductorslayer

Reputable
Aug 21, 2014
11
0
4,510


I've had some trouble using System Information Viewer for temps, as it always reports lower temps. I think it reports actual/general CPU temp, not core temps. For example, if SIV says my cpu temp is 28c, MSI A probably says my core temps are around 38c.

Is there a way I can program SIV to use core temps instead? Or is there a different program you guys would recommend using for setting a CPU fan curve (one that will be compatible with my Gigabyte Z97x UD3H motherboard)?



Case is a Corsair Air 540
 
Upvote 0 Downvote
Karadjgne

Karadjgne

Titan
Ambassador
Dec 26, 2012
30,739
4,559
142,790
i8KFanGUI, SpeedFan (if you have trouble with pwm, set to manual) and Asus fanXpert2

I've never used the i8KFanGUI, SpeedFan will supposedly find all fans including gpu, but that's a hit or miss depending on motherboard and gpu. It's also pretty complicated but once you figure it out its really very good. The Asus is a breeze to setup and use, but it's also very simple as far as control goes. There are more than a few reports of ppl with Gigabyte boards having problems with fan control of the 3pin headers, but they are older.

I like Realtemp and cross-check with speccy. So far both have reported the same temps. They run core temps from the core, not the socket like some software does. coretemp and hwInfo (not hwmonitor) are also accurate for core temps.

As far as case fans, the Corsair sp120s are not that great for radiator fans unless you have the high performance ones. With the Noctua in the intake, 2x 120's and a 140 exhaust, you are a little unbalanced. I'd suggest (when you get the software sorted out) not useing the rear exhaust at all. It has a stronger draw than the sp120 right above it, so you are decreasing airflow meant to go through the radiator. It should make a difference in temps as now you'll have a direct airflow path instead of split. It's how my pc is setup and I saw a 5-7° drop in case temps and gpu temps although cpu stayed the same. If you are running the sp120s at less than @1500 rpm I'd also suggest using them in pull not push, its more effective, upto @10% or so
 
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