Possible Cooling Issues?

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computer_noob91

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Jul 3, 2013
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Hello!

I'm trying to overclock my FX 8350 to a conservative 4.3 ghz overclock, however, when I run Prime95 CPU temps hover around 70 degrees C after 5-10 minutes. I am wondering if this is okay. I am getting these reads from the built in ASUS Suite software.

Bus Freq : 215
CPU Volt : 1.35625



Thanks!

PC Info:

FX 8350
Noctua NH-U14s
Asus m5a99fx pro r2
Corsair Vengeance Pro 1866
Corsair AX 860 PSU
 
Solution
JimF_35
70 seems fine to me. As a rule I try to keeps the temps 20c under the Thermal Trip which I believe is 90c on that CPU. This also depends in-part on your ambient temps. What is your ambient temperature?

Also, those temps seem a little high for only 1.35v. What cooler are you running. Might want to get a more efficient one so you can get even better overclocks.
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JimF_35

JimF_35

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70 seems fine to me. As a rule I try to keeps the temps 20c under the Thermal Trip which I believe is 90c on that CPU. This also depends in-part on your ambient temps. What is your ambient temperature?

Also, those temps seem a little high for only 1.35v. What cooler are you running. Might want to get a more efficient one so you can get even better overclocks.
 
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computer_noob91

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Ambient temps 20-30 degrees C. Also yes that's what I am worried about. I am using the Noctua NH-U14s (not a crappy cooler) but am getting those high temps at 1.35V. I am wondering if I messed up applying thermal paste when installing the cooler, but am seeking an answer before having to take it off (yeah sorry I'm lazy).

When rendering in After Effects though my cpu temp doesn't go over 50.
 
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woodsro

woodsro

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I am going to go against the grain here and say...forget Prime95, forget that program even exists. All your doing running that program is heating your CPU and shortening its possible lifetime.

The only temperature monitoring program that reads temps from AMD chips correctly is AMD Overdrive. As you can read directly from AMD own documentation and BIOS developer guide

http://www.tomshardware.com/faq/id-2122665/understanding-temperature-amd-cpus-apus.html

As long as you don't exceed the Thermal Margin listed in Overdrive you are perfectly safe, its perfectly safe to operate your chip within the Thermal Margin's reported by Overdrive.

Secondly, use AMD Overdrive to test the stability of your CPU. AMD Overdrive's stability test is specifically designed to test AMD CPU's, AMD provides this test to overclockers to test their CPU's correctly, take advantage of it...AMD is not going to tell you wrong...if you insist on running a stability test for 24 hours(I wouldn't, i think that's a waste, but each to their own), use the CPU stability test in AMD Overdrive, your going to get a much more accurate assessment if its stable then Prime as AMD wrote that software specifically to test their CPU's, if their is any problems, it will find it.

 
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rubix_1011

rubix_1011

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You can never cool below ambient with air or water/liquid cooling and ambient air temps play a very large part in heat dissipation at load. Also realize that the closer the 2 temperatures are to one another (ambient and reported) the more difficult it is for heat to dissipate in the ambient. Hence why a car engine in the summer doesn't cool as well as a car engine in the winter; the ambient air doesn't allow as efficient heat exchange.

I doubt this is a thermal paste issue as the mounting of the cooler will easily displace excess TIM from under the heatsink. You might see a minor change by re-applying a thinner layer, but heat and pressure of the cooler should account for excess TIM...you just might have a mess oozing out under the cooler. You would have to have a significantly thick insulating layer of TIM. Have you validated that you are optimized on all your BIOS settings for your overclock? Can you lower voltages or make adjustments that would lower watt output?

An easy way to tell what is going on here is to revert your CPU clocks and settings to stock defaults across the board. Run your benchmarks in order to gauge temps based on ambient air temperature. Set your CPU overclock, re-evaluate.

Without having a baseline to evaluate against, you're kind of blindly looking for solutions that might not even be the problem.
 
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computer_noob91

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Hi,

Yes I've tried testing at default settings and was getting CPU temp read in the 50s in Prime95. I have not tried lowering voltages because I didn't think I should be getting such high temperatures at 1.35V anyway, but I shall try that. As for the thermal paste, I am sure I didn't put too much/too little on so reapplying will be my last resort.

Thanks for the response rubix!
 
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JimF_35

JimF_35

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Quick question. How did you affix the cooler? Did you use the bar through the middle or did you screw it down to the back plate?

I never use the bars through the middle because they cause uneven pressure when the heat sink is pressed down causing the thermal paste to spread unevenly especially when you use the spread method over the line method. If you only have a bar I recommend the line method when applying the paste and make sure the line is perpendicular to the bar.
 
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computer_noob91

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I just used the AMD mounting hardware that came in the box. 2 metal pieces that support the cooler then screwed down the cooler to the two metal pieces.
 
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JimF_35

JimF_35

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Oh, sorry I thought you were using a Noctua Cooler but I just realized that you are using a Noctua Fan. Have you considered using an after market cooler like a Cooler Master EVO?...

https://www.google.com/webhp?sourceid=chrome-instant&rlz=1C1GGGE___US585US586&ion=1&espv=2&ie=UTF-8#q=buy+cooler+master+hyper+212+evo&tbm=shop
 
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computer_noob91

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Hi,

Actually I am using a noctua cooler, the NH-U14s with fan included.
 
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