FX8320 high temps on prime95

Toggle sidebar Toggle sidebar
interpolnyc

interpolnyc

Reputable
Oct 15, 2014
37
0
4,540
Hi

I have an FX8320 with an ASUS M5A97LE R2.0 motherboard.

The problem i`m having is when I try to test temps with prime95.

Playing all kind of games I have a max of 57º (Watchdogs - Middle Earth) but when I run prime95 test the temps go up to 70º and I shut down the test to avoid damaging the CPU.

The weird thing is how the temps go high very fast.

On prime95 I start from an idle temp of 35º and scale up to 65º in about a minute or two... then after 5 miutes it goes up to 70º and I don`t like that and stop the test.

I have a CM Silent pro 700 watts powersupply and a 12 cm exaust fan on my case. Also put an nzxt 20cms intake and got no bennefits from that.

What do you think?

I`m using stock cooler of course and vcore on automatic was up to 1.365v on full load and did undervolting to 1.300v and the temps went down on 2 or 3 degrees.

I have a damaged chip? a bad heatsink? Or what is the problem?

I re installed it like 4 times and I installed pcs since I was 20 and now I`m 32... so its not my first time...

THANKS !!!

 
Solution
MeteorsRaining
It's not strange, Prime95 absolutely hammers the CPU, so the temp increase is expected. Games just can't put that much of load on CPU, no program infact can, execpt other stress testing tools.

NightAntilli, 70C socket temp is perfectly normal, and FX do not throttle at 70C socket.

Socket temps equate to CPU temp. "Core Temp" is what AMD refers to as "TCTL" and is a non-physical temperature on an arbitrary scale measured in degrees. It does not represent an actual physical temperature like die or case temperature.

And according to multiple threads (here, here, here and here) and from what I've seen, and perhaps logic, the indvidual core temps should always be lower than socket temps.

Also, Starting...
Sort by date Sort by votes
H

huilun02

Splendid
Feb 29, 2008
4,324
0
24,960
Prime95 pushes all cores while most games use what 3-4 cores max?

Your CPU has eight cores. So when all are pushed the heat produced goes up by a lot.

It may be possible that the heatsink/thermal paste may not be in full contact with the processor.

edit: The stock air cooler from AMD sucks. Consider getting a new one it should make your CPU happier.
 
Upvote 0 Downvote
MeteorsRaining

MeteorsRaining

Champion
Jul 27, 2014
8,346
3
50,565
Upto 74C is safe for FX, and the stock heatsink is crap anyways, if you have room temps of 26C+, then the temps are fine. Also, do the test until the temps reach 80C, it will not damage the CPU.
Also, The MoBo specifically is not great too, power phases wise, and naked VRMs will only add to the temps, adding a cooler on the back of the VRMs will help a lot.
 
Upvote 0 Downvote
interpolnyc

interpolnyc

Reputable
Oct 15, 2014
37
0
4,540
I already put a heatsink to the vrm of the motherboard.

And thanks for the tip about holding to see if it reachs 80°.

I'll try to see how far it goes.

I think its strange the way it goes up from 36° to 70 in a couple of minutes.

I've already re installed the cpu heatsink 4 times and I think is well installed.

Is normal that goes from 36 to 70 that fast?
Remember that when I play games never pass 57° even with 26°c room temp.
 
Upvote 0 Downvote
NightAntilli

NightAntilli

Honorable
Jun 12, 2014
2,125
24
12,465
There are generally two temperatures to monitor with an FX CPU. The socket temperature and the package temperature. The CPU starts throttling at a socket temperature of around 70 °C on most motherboards. There is a reason the temperature was chosen, and I would not go too far beyond it. The package temperature (which is the temperature of the CPU itself), generally is easier to be kept lower than the socket temperature. Which means that the socket will be the limiting factor rather than the CPU itself.

And yes, such temperature increases during a short time are normal.
 
Upvote 0 Downvote
interpolnyc

interpolnyc

Reputable
Oct 15, 2014
37
0
4,540
The temps that I'm telling you are cpu not package.

Package temps are way lower. Around 50°

I use asus monitoring and also hwinfo to record temps.

Also the cpu doesn't throttle unles I activate the protection in ASUS soft.

Full load at 69° at 1.36v or 1.30v if I undervolt it.

I don't know what to do.
 
Upvote 0 Downvote
MeteorsRaining

MeteorsRaining

Champion
Jul 27, 2014
8,346
3
50,565
It's not strange, Prime95 absolutely hammers the CPU, so the temp increase is expected. Games just can't put that much of load on CPU, no program infact can, execpt other stress testing tools.

NightAntilli, 70C socket temp is perfectly normal, and FX do not throttle at 70C socket.

Socket temps equate to CPU temp. "Core Temp" is what AMD refers to as "TCTL" and is a non-physical temperature on an arbitrary scale measured in degrees. It does not represent an actual physical temperature like die or case temperature.

And according to multiple threads (here, here, here and here) and from what I've seen, and perhaps logic, the indvidual core temps should always be lower than socket temps.

Also, Starting with the Phenoms, AMD's digital sensor no longer reports an absolute temperature value anymore, but a reading with a certain offset, which is unknown. It is estimated that this offset is between 10 - 20C. So no matter what program OP uses, the reading will not be perfect.

Core temps are easy to keep low, socket temps are where the heat builds up and usually stops an overclock before the core does. Only real way to keep socket temps down is to put a fan on the back of the MoBo. The socket temp doesn't really have a hard limit, but this can go quite high if your VRM cooling isn't too good while still having a good CPU cooler.
 
Upvote 1 Downvote
Solution
MeteorsRaining

MeteorsRaining

Champion
Jul 27, 2014
8,346
3
50,565


Your temps are perfectly fine for stock cooler.
 
Upvote 0 Downvote
NightAntilli

NightAntilli

Honorable
Jun 12, 2014
2,125
24
12,465
Yes it's enabled :) I disabled it when overclocking and I allowed it to reach 75 °C before stopping the stress test. After that, I installed a small fan behind the motherboard and my temperatures dropped significantly. After I finished overclocking I turned the protection back on.
 
Upvote 0 Downvote
interpolnyc

interpolnyc

Reputable
Oct 15, 2014
37
0
4,540


You said that package temp is my REAL cpu TEMP

but how could it be LOWER than the ASUS soft CPU temp or the CPU temp in HWInfo???

can you explain me that?
 
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