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Help with undervolting and lowing temperatures of FX-8350

post #1 of 14
Thread Starter 
Hey guys! How are you?

I'm trying to undervolt my CPU because I'm having big troubles with temperature. When I try to stress it with Prime95 or IBT it reaches 80°C in less than 30 seconds. It has the stock cooler and it was recently cleaned and reapplied thermal paste.

What I did is the following:




And this is the configuration under "CPU Configuration":


And here are the readings of HWMonitor and CPU-Z after doing the previous actions (I have only open Chrome):



Am I doing this right?

Just in case this is my PC:

ASUS M5A97 R2.0
AMD FX 8350
2x4 GB DDR3 Kingston (1600Mhz HyperX Blu / 1866Mhz HyperX FURY Blue)
EVGA GTX 950 SC
1 TB HDD
Cooler Master Extreme Power Plus 550W

Thank you very much for your help! smile.gif
post #2 of 14
Prime 95 is a stress test and is abnormal compared to normal use. What are your typical temps while using the machine? You have GTX 950. What are your temps while playing a typical game?
post #3 of 14
Thread Starter 
Quote:
Originally Posted by Depauville Kid View Post

Prime 95 is a stress test and is abnormal compared to normal use. What are your typical temps while using the machine? You have GTX 950. What are your temps while playing a typical game?

This is for example playing FIFA 16 for a few minutes:



EDIT: FIFA 16 after finishing the match:


Edited by fedee13 - 11/6/15 at 5:51pm
post #4 of 14
I will never understand people who post screenshots at idle... Never... Anyway... If under full stress you get 1.24v and you are still stable, then consider yourself lucky. Usually for 4Ghz, depending on motherboard, an "average" chip needs 1.265-1.28v. If you are stable at 4Ghz at 1.24, you have above average chip. Of course if you are unstable, that's another story.

Anyway, assuming you are stable and that you know how to apply paste and install the heatsink, i don't think there's much to do here. You need an aftermarket CPU cooler and maybe add fan to blow on mosfets (if they get cooled down, it will benefit the CPU temp too).
Edited by Undervolter - 11/7/15 at 12:50am
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post #5 of 14
Same as above, we assume you know how to apply thermal paste properly.

Even with the stock cooler, at stock clock speeds, there isn't any reason why your chip is pushing 80 degrees. You probably have a case airflow problem or a poor fan setup.
post #6 of 14
Quote:
Originally Posted by fedee13 View Post

This is for example playing FIFA 16 for a few minutes:
Warning: Spoiler! (Click to show)


EDIT: FIFA 16 after finishing the match:



The 80c is your motherboard socket temp, your CPU is hitting 73c on the package and it's probably a spike. Increase your case airflow, get a better cooler on the CPU and leave the FX at stock, undervolting it or underclocking it etc is a waste of the performance you could be getting.
Quote:
Originally Posted by Depauville Kid View Post

Same as above, we assume you know how to apply thermal paste properly.

Even with the stock cooler, at stock clock speeds, there isn't any reason why your chip is pushing 80 degrees. You probably have a case airflow problem or a poor fan setup.

It's his socket hitting 80 not the CPU, sockets will hit higher temps, only way to tame them is to increase case airflow, better cooler on the cpu and a fan on the socket.



15mm fan on the back of mine, swapped the panels on the 500R, basically mesh door so the fan can pull ambient air.
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post #7 of 14
Thread Starter 
Quote:
Originally Posted by Undervolter View Post

I will never understand people who post screenshots at idle... Never... Anyway... If under full stress you get 1.24v and you are still stable, then consider yourself lucky. Usually for 4Ghz, depending on motherboard, an "average" chip needs 1.265-1.28v. If you are stable at 4Ghz at 1.24, you have above average chip. Of course if you are unstable, that's another story.

Anyway, assuming you are stable and that you know how to apply paste and install the heatsink, i don't think there's much to do here. You need an aftermarket CPU cooler and maybe add fan to blow on mosfets (if they get cooled down, it will benefit the CPU temp too).

I posted temperature at idle because I thought that 40°C was a little too hot (I'm a total newbie at this).
I was thinking of buying a T4 or a TX3, which one do you recommend? I'm not going for the 212 because my case is a Thermaktake V4 and I don't think it will fit. Thanks.
Quote:
Originally Posted by Depauville Kid View Post

Same as above, we assume you know how to apply thermal paste properly.

Even with the stock cooler, at stock clock speeds, there isn't any reason why your chip is pushing 80 degrees. You probably have a case airflow problem or a poor fan setup.

I will check both problems and come back later. Thanks!

Sent from my LG-D800 using Tapatalk
post #8 of 14
Quote:
Originally Posted by fedee13 View Post



I posted temperature at idle because I thought that 40°C was a little too hot (I'm a total newbie at this).
I was thinking of buying a T4 or a TX3, which one do you recommend? I'm not going for the 212 because my case is a Thermaktake V4 and I don't think it will fit. Thanks.


It is a bit hot, but some of your cores show still 4Ghz. So, when someone says "idle", it can be different from "perfectly idle". If your idle is like 2 seconds after 100% load, it's more normal than if it's after 2 minutes of doing nothing.

Anyway, the Hyper T4 should be better. If even with that you get insane temperatures, then there is something profoundly wrong with the air circulation in your case probably. Beyond that you go to the more "exotic" explanations, but when one has the stock cooler, it's always the prime suspect, because the stock cooler can be really bad.
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post #9 of 14
Quote:
Originally Posted by fedee13 View Post



I posted temperature at idle because I thought that 40°C was a little too hot (I'm a total newbie at this).
I was thinking of buying a T4 or a TX3, which one do you recommend? I'm not going for the 212 because my case is a Thermaktake V4 and I don't think it will fit. Thanks.

I will check both problems and come back later. Thanks!

Sent from my LG-D800 using Tapatalk

I'm very surprised they don't give you information on how big of a cooler you can fit inside their case, then again it is thermalfake we're talking about...

The case could possibly fit a 240mm AIO cooler which will help tame your heat production monster.

Basically FX CPUs calculate temps rather than report them via a thermometer or sensor, the FX will report inaccurate temp reading when it isn't under constant load so we use the motherboard's socket temps to guesstimate how hot the CPU is. When the chip is under load it will show an accurate reading. I stopped using other thermal reading software when I found HWinfo64 had a graph function which helps me monitor temps easier. I pretty much ignore the min and max temp readings these days because of temperature spikes.

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post #10 of 14
Thread Starter 
Quote:
Originally Posted by Benjiw View Post

Quote:
Originally Posted by fedee13 View Post



I posted temperature at idle because I thought that 40°C was a little too hot (I'm a total newbie at this).
I was thinking of buying a T4 or a TX3, which one do you recommend? I'm not going for the 212 because my case is a Thermaktake V4 and I don't think it will fit. Thanks.

I will check both problems and come back later. Thanks!

Sent from my LG-D800 using Tapatalk

I'm very surprised they don't give you information on how big of a cooler you can fit inside their case, then again it is thermalfake we're talking about...

The case could possibly fit a 240mm AIO cooler which will help tame your heat production monster.

Basically FX CPUs calculate temps rather than report them via a thermometer or sensor, the FX will report inaccurate temp reading when it isn't under constant load so we use the motherboard's socket temps to guesstimate how hot the CPU is. When the chip is under load it will show an accurate reading. I stopped using other thermal reading software when I found HWinfo64 had a graph function which helps me monitor temps easier. I pretty much ignore the min and max temp readings these days because of temperature spikes.


According Thermaktake official page:

Q: What is the CPU cooler height limitation for V4?

A: The CPU cooler height limitation for this chassis is 160mm

This is why I wouldn't go for the 212. I'll get the Hyper T4.

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