Question Ryzen 3900X temps reaching 90'C when idle & 95'C under load? [Solved]

ficler1977

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Mar 23, 2013
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hi
Have recently upgraded CPU from 2700X to 3900X
Temps are 35'C in bios 40'C in Idle slowly rising to 79-90'C
Under load it reaches 95'C where i guess thermal throttling starts.
on 2 occasions PC switched itself off while in BIOS "high temp)
Corsair H60 Water cooling
Msi X470 Gaming plus max
16gb ram
All working perfectly on 2700x, temps under load never reached 70'C

I guessed maybe water cooler died but it appears in bios as running(rpm)
I have put another fan cooler Arctic Cooling Alpine 64 Pro (brand new) and temps are only a bit better

my thoughts: both coolers are too weak for this or died.
on YT there is test with 3900x and h60 and it runs good.
in BIOS all fans set to max, also played with smart fan etc.

What should I do or buy to get 85'C max under full load?(maybe water cooling would be overkill, dont want to spend too much money as i am on budget)
Another question. is there any sort of cooler rating (like with PSU 650W) where you will know the new cooler will be powerful enough.

Main question is: are both coolers not good enough or is there any set up issue??

Solution:

bought ARCTIC Liquid Freezer II 280 and temps are idle: 31'C and 52'C under stress.
As case study need to say my H60 would be sufficient but it died during CPU swap.
Honestly never thought 2 coolers might go bad at same time as coincidence. I even thought CPU/CPU's sensor is faulty or even something is blocking proper cooler installation.


thx
 
Last edited:
hi
Have recently upgraded CPU from 2700X onto 3900X
Temps are 35'C in bios 40'C in Idle slowly rising to 79-90'C
Under load it reaches 95'C where i guess thermal throttling starts.
on 2 occasions PC switched itself off while in BIOS "high temp)
Corsair H60 Water cooling
Msi X470 Gaming plus max
16gb ram
All working perfectly on 2700x, temps under load never reached 70'C

I guessed maybe water cooler died but it appears in bios as running(rpm)
I have put another fan cooler Arctic Cooling Alpine 64 Pro (brand new) and temps are only a bit better

my thoughts: both coolers are too weak for this or died.
on YT there is test with 3900x and h60 and it runs good.
in BIOS all fans set to max, also played with smart fan etc.

What should I do or buy to get 85'C max under full load?(maybe water cooling would be overkill, dont want to spend too much money as i am on budget)
Another question. is there any sort of cooler rating (like with PSU 650W) where you will know the new cooler will be powerful enough.

Main question is: are both coolers not good enough or is there any set up issue??

thx
That AIO cooler is no better than mediocre air cooler. 3900x draws about twice the power than 2700x so you need much better cooler. Another thing, 3000 series Ryzen needs to be kept up to 60-65c for best performance, at 85c most of boost will be lost and loose much performance,
 
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"Temps are 35'C in bios 40'C in Idle slowly rising to 79-90'C"

In bios, your temp yould be stable and not increasing, it's not normal.
Also the 3900x is sold with a standard AMD aircooler that is less performant than an AiO. So yours should be at the very least at the same level of performance.

Try to reseat your cooler. something is wrong.
You told that you bought a new cooler. did you removed the plastic film on the metal plate ?
 
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"Temps are 35'C in bios 40'C in Idle slowly rising to 79-90'C"
In bios, your temp yould be stable and not increasing, it's not normal.
Yes this is my biggest worry. I have reattached processor 7 times yesterday. Used 2 different thermal paste.
You told that you bought a new cooler. did you removed the plastic film on the metal plate ?
Yes of course.

At the moment I think: H60 water cooling died
new fan cooler is not strong enough.
 
This is what I use in my AM4/AM5 builds.


I don't use the stock AMD coolers except in the most "mild" of use-cases, and not in systems I personally use.
 
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