AMD FX-8370 + Be Quiet! Pure Rock. Temps exceeding 60 degrees Celsius in 2 minutes stress testing. Is this normal?

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BLaZiNgSPEED

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I am having a problem with my CPU temperatures despite installing the new Be Quiet! Pure Rock cooler to replace the Stock AMD Cooler. I have an AMD FX-8370 Processor at Stock Speed.

I installed the Be Quiet! Pure Rock Cooler but with the stock thermal paste that was already attached. I remove the old one from the CPU with the thermal removing alcohol. But my temperatures are shooting up to 64 degrees Celsius in only 2 minutes of stress testing before I quickly stop the process!!! Is this normal?!

Idle temps lowest is 33 degrees Celsius. But when I do a full 100% stress test in just 2-3 minutes the temps would exceed over 60 degrees. I was wondering whether this is normal.

i have installed the same cooler for my mums PC that has an AMD FX-6300 CPU but her temps are low. Highest 44 degrees even after hours of stress testing while lowest 20 degrees.

But on my dads FX-8370 CPU highest so far is 64 degrees Celsius before I quickly stop the process. While lowest is 33 degrees Celsius. I am wondering whether these are normal results?

Or do I need an even more powerful cooler than that? My motherboard is ASROCK 970M Pro3. And my case is Aerocool X-Strike GT! Many thanks...
 
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DonkeyOatie

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The FX6300 is a 95W CPU, the FX8370 is 125W with a factory clock boost. The idle is fine, and the stress test is OK. On a separate issue, I would not be running that CPU on that motherboard. The power delivery is too light. It's fine for a FX6300.

What's your PSU?
 
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BLaZiNgSPEED

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The PSU is an EVGA 750 Watt Gold Certified PSU.
That motherboard is a new one this year in May it was officially released. It supports AMD 8 Core CPU's with up to 140 Watt CPU. Plus it supports AMD CrossFire. ASRock 970M Pro3
I don't think the motherboard is a problem. But I also don't see why the FX 8370 should have the temps go so high. I read that the Be Quiet! Pure Rock supports overclocking for the FX 8350 which consumes far greater electricity power compared to the FX 8370.

Maybe it's the thermal paste. Because when I tried to put the heatsink it was moving several times. So I am suspecting that may have scraped off the thermal paste while the cooler was moving. I may need to reapply thermal paste. But I still need confirmation.

Those temps aren't normal. I am sure if I left the stress test to continue it would reach 70+ degrees Celsius. I stopped it at only 2 minutes and it already reached 64 degrees. I don't think that's normal at all. I see no improvement from the Stock Cooler whatsoever when I do the stress testing comparison... I have a Quad Core Q8400 2.66 GHz overclocked at 3.0 GHz that CPU consumes more electric power than the FX 8370 and I have a weaker cooler Zalman CNPS7X and the temps don't exceed 63 degrees when safest is 71.4 degrees celsius.

There is no point in buying an aftermarket cooler if the temps aren't staying within the healthy range. Otherwise you may as well stay with the Stock AMD Cooler...
 
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DonkeyOatie

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You are free to ignore my advice. It may support the FX83xx series, but the higher binned 8370 puts more stress on the power delivery than the lower 8320 at stock. I was not suggesting the motherboard as a problem in this case, but when you come to overclock to 4.6Ghz, if you can get there, and if not, why not get a cheaper 8320 in the first place, power delivery and motherboard overheating many be a problem. Gaming is a very high-performance usage. In browsing and productivity it's likely just fine.

On a full liquid cooling rig a heavy stress test like Prime95 will reach 60C for a FX8370. For you to exceed 60 is not surprising.

This review http://www.frostytech.com/articleview.cfm?articleid=2779&page=5 shows the temperature at about 20 degrees above ambient in the case, so that should be about 50C under normal use.

What are you using to measure the temperatures, AMD Overdrive?
 
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BLaZiNgSPEED

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Well I have no interest to overclock the processor, even if I do at some point in the future it will probably be a very mild one. I am using it at stock 4.0 GHz which I expected the cooler to cool better than that. This FX 8370 was primarily an upgrade for my dad who was using a Pentium 4 PC for 10 years. So since he only upgraded after many years I thought to buy him an FX 8370 because my mum already has an FX 6300 which wouldn't be that much of an upgrade to an FX 8320. That's why I built him a PC with FX 8370. Plus it passes the Recommended requirements for many latest games such as the newly released Just Cause 3. That's why I wanted something better.

And yes I am using the AMD Overdrive for stress testing with SpeedFan as the monitoring software. This is the same combination I am using for my mum's FX 6300 where it uses the exact same cooler. It has a worser case CiT Vantage Type-R Gaming Case with less airflow than the Aerocool Strike-X GT. Yet her temps go no higher than 44 degrees with lowest at 20 degrees.

I feel totally confused right now. Because I was reading many reviews. Last month people advised me to get this cooler on the pcpartpicker forums, they claim it has helped them overclock the FX-8350 and still keep the CPU temps low. So I went with their suggestion thinking it would be enough for the FX 8370 as that CPU is meant to be more efficient compared to the FX 8350. But now I am seeing that the temps can't even remain at a healthy state even with stock CPU speeds...
 
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DonkeyOatie

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The FX8370E is more efficient, the FX8370 is higher binned than the FX8350.

20 degrees is below indoor ambient in most places. Does your mum live without heating in the winter? I suppose a minimum of 20 degrees right at startup is possible in a cold room. I'm assuming that is not an idle minimum.

Are you absolutely sure the cooler is mounted properly with all attachment points tight? About the only easy way of being sure is to take the cooler off and see if the thermal paste is a thin evenly distributed layer. I wanted to check that you were using Overdrive. Other measurements can be unreliable.

What are you using to stress test? Prime95?

As I said above, full liquid cooling of the FX8370 when the chip was benchmarked, while stress testing reached 60C, so your cooler getting closer to 70 seems OK.

70C will not damage your chip if done for a short period of minutes. I'd like to know if it plateaus anywhere below 85C on that cooler. When my students are building their systems, the often get to over 90C if their cooler is not seated properly or they forgot the thermal paste :(. We have yet to lose a CPU. It may have shaved a few months off the life, but we don't plan of using them five years from now.

If it keeps rising straight past 80C with signs of going higher STOP! AMD chips are less heat tolerant than Intel.
 
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Yeah my mum is living in the same flat as us but her PC is in the living room where the room temps on average are 22 degrees but her PC is next to the balcony window it maybe that's why her temps can go as low as 20 degrees. To be honest the idles aren't so important for me as as much as the full load temps.

I am not using Prime95. I am using the in-built stress testing option within the AMD Overdrive software where I can see that the CPU useage goes to 100% on all cores. But within a couple of minutes the temps go over 60 degrees.

Yeah I know that the FX-8370E is more efficient. But when I check the comparison between FX-8370 vs FX-8350 AMD FX 8370 vs 8350
When I check the comparison it says...

Reasons to consider the
AMD FX 8370

Much lower annual home energy cost

30.11 $/year

vs

56.1 $/year

More than 45% lower annual home energy cost

Much lower annual commercial energy cost

109.5 $/year

vs

159.62 $/year

More than 30% lower annual commercial energy cost

This is why I bought the FX-8370 even though it was a little more expensive than the FX-8350. I am not 100% sure if the thermal paste is evenly distributed. The heatsink was moving several times while I was trying to align in to the correct position while installing it. I don't know if that has anything to do with the temps getting messed up as a result. But then again you're saying that I may need a liquid cooler to keep the temps under 60 degrees. :( Now I am not sure whether to bother to reapply thermal paste or replace the cooler. :/
 
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DonkeyOatie

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No. I'm not saying that you need a full liquid cooler because normal use is lighter than a stress test. I routinely get 70 or even 80C on my stress tests, but the system, even under maximum gaming or computation load, does not go past 60C.

AMD Overdrive's test is a little less stressful so now I know that it was not Prime95, 60C and rising fast is a bit high for a stress test

Idles don't matter, except that a poorly seated cooler or uneven thermal paste usually results in a high idle temp too. If the problem is a normal idle and a high stress test, the problem is often with the case airflow or the cooler's fan control. At 60C the fans on your cooler should be running at fill speed and they are moderately loud (about 50 decibels according to the review) Can you hear the fans ramping up as the temperature increases? If you set the fans to 100% on, does this help at all?
 
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Yeah I am aware that in most normal and computer gaming use the temps won't go that high.
I believe that it may be related to the poorly uneven thermal paste. As the heatsink was constantly moving. I had difficulty installing the cooler as it required the long metal part to be clipped in between the brackets. So I guess during this process the thermal paste may have became uneven as a result.

Another possibility I am suspecting is that I bought the cooler over a month ago. Maybe the thermal paste dried out a little even though it may have been in the boxed well packetted. I only installed it a couple of days ago.

No I can't hear the fans becoming any louder than idle. The cooler is dead silent. Even though it is meant to be 50 decibels. But it's silent like that even on my mums PC but no temp issues there.
I even went to the BIOS settings and tried changing the fan speed to Level 9 and even Custom Speed: 255 which was the maxed figure. But it made no difference.

I might try and reapply thermal paste and see if there is an improvement. I have Arctic MX-4 that I had bought recently unused yet. I will see if that has some improvement over the stock thermal paste that was included with the cooler.
 
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Calculatron

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Are these socket temperatures, or core temperatures?
 
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These are core temps.
Well there is some positive news. Last night I kept the stress test for a full 1 hour. The maximum temperature was 65 degrees Celsius. That's somewhat of good news. As all I need is to try and reduce the temps by a few degrees and the problem will be resolved.

I think that if I apply new thermal paste this will help lower the temps. It's interesting that the temps rise to 60 degrees in 2 minutes but no longer rise above 65 degrees after that... The situation is better than I had expected! :)

As someone else told me that the pre-applied thermal paste of most heatsinks are crap and that applying quality thermal paste such as Arctic Silver 5 will improve the temps. I have Arctic MX-4. I will see whether the temps will improve once I reapply new thermal paste!
 
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Calculatron

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MX-4 is good stuff, and it should help with the temperatures, but I wouldn't expect a world of difference.

I took a look at your case, and it has one 120mm intake, and one 120mm exhaust fan. This *should* be sufficient.

If they are not running at full speed already, I would try that, along with tidying up your cables to allow for maximum airflow. This might do the trick.

Lastly, you may consider undervolting your CPU. The stock voltages on CPUs are often above and beyond what they need to be - my FX-8320 ran at 1.350 volts at stock frequencies, but it can run at 1.180v, and that can make a huge difference in temperatures.
 
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DonkeyOatie

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Good point. The binning has a wide range. The main difference between the FX8350 and 8370 is that the 8370 is supposed to run 4.0Ghz at a lower voltage, but a good chip might run a lot lower.
 
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