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Hot Core temp stock speed, FX8350.

post #1 of 12
Thread Starter 
Hi!

I think I got a problem.

I have undervoltage my FX8350 to 1.325V and NB to 1.15V and RAM to 1.4V.

Adaptive voltage -OFF, Cool n quiet -ON and the other power saving options is -ON.

The system is stable but still hot!

On my FX8350 my core temp peaking at 66c! fans on max RPM!

I have tried re-apply thermal paste over and over again (I know how to do it) but it wount do any good.

I got 2 140mm fan intake and 1 140mm exhaust fan.

1 CPU cooler U14S with 2 140MM Noctua fans both pointing at the exhaust fan.

The CPU threads are really fine, they stay at 45c under heavy load, but the CPU core runs away up to 65-66c.

I tihnk the heat spreader on the CPU is failing..is it possible to exchange on warranty?

Thanks!
post #2 of 12
The temperature is normal.
Edited by BradleyW - 2/9/16 at 7:07am
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post #3 of 12
Socket temp is normal for AMD 8350 for being that high under load.
45c on the cores which is very good.

If you want to lower socket you want to get airflow on the socket, behind the mobo exhausting out.
Seen temps drop 6-8c.
    
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post #4 of 12
Thread Starter 
I will try to put a 60mm fan back of the CPU socket and see if that will fix it.

Does INTEL have the same problem?
post #5 of 12
Asrock 970M Pro3? 99% that's the culprit. The natural order of things is if your socket temp is 65C and your core 45C. Please run Prim95 for 10 mins then post a screenshot of HWMonitor and CPU-Z open.

All Asrock 970 run hotter in the socket. The cheaper the board, the hotter it runs as a general rule of thumb. Also, 1.325v isn't much of an undervolting. What's your stock voltage with Turbo disabled? Usually, average chips, do 4Ghz at 1.28v.
Edited by Undervolter - 2/9/16 at 7:59am
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post #6 of 12
Thread Starter 
I had the same problem with my Asus Sabertooth X99, I wanted a mATX format motherboard smile.gif

After 2 min stresstest.


Stock voltage is 1,365V with turbo 1,45V





Maybe easier to toss this setup in the trash, and go Intel Skylake I3 35W?
Edited by Piddeman - 2/9/16 at 8:38am
post #7 of 12
Quote:
Originally Posted by Piddeman View Post

I had the same problem with my Asus Sabertooth X99, I wanted a mATX format motherboard smile.gif

After 2 min stresstest.


Stock voltage is 1,365V with turbo 1,45V





Maybe easier to toss this setup in the trash, and go Intel Skylake I3 35W?

Your effective voltage is 1.28v. Simply the motherboard has big vdroop. The most important temperature for the CPU is the core. Limit is 70C. So you are fine. The "CPU" temp is influenced by the socket temp too (due to motherboard). This motherboard tends to heat more than the Sabertooth (if you live it for more than 2 mins, it will keep rising). But for that motherboard, it's what you should expect.

CPU temp should better not exceed 70C either.
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post #8 of 12
Quote:
Originally Posted by Piddeman View Post

I had the same problem with my Asus Sabertooth X99, I wanted a mATX format motherboard smile.gif

After 2 min stresstest.


Stock voltage is 1,365V with turbo 1,45V





Maybe easier to toss this setup in the trash, and go Intel Skylake I3 35W?

What is the problem? Max temperature of the CPU and socket are both 70C and you are hitting 60 so you are 10C below what AMD consider safe temperatures for continuous use.

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post #9 of 12
Crappy motherboard and serious case of PEBKAC.
post #10 of 12
Thread Starter 
I managed to fix it, I did cut a 100x100mm hole on the chassi side, there the motherboard socket is, and glued on a 60mm fan on low speed on back of the socket.

Now I got the CPU OC to 4500MHZ and 1,42V the temp never goes by 62c on core under heavy load smile.gif

I will put a mesh net where the hole is so it will look better smile.gif.



It seems like many of you are ''PEBKAC.'' tho you didn't know that 60+ is high for undervoltage and stock clock with a U14S, so pls ppl...
Edited by Piddeman - 2/15/16 at 1:57am
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