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3800XT hot even in idle and fan up and down

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post #1 of 71 (permalink) Old 07-26-2020, 03:05 PM - Thread Starter
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3800XT hot even in idle and fan up and down

Hello !


I´ve bought a ryzen 3800xt on a gigabyte aorus b550 elite board. My cooler is a scythe mugen 5.


I have a problem with high temperatures: idle 50°C and under geekbench even 88°C . The cpu
is boosting even when I start a webbrowser over 70°C causes in up and down of the fan speed...


I don´t think another cooler is fixing the problems and a friend told me about the forum to ask for
help with undervolting and values for it.

I´m a noob in overclocking and I wanted to ask what I should try. VCore offset? And what else?
Any experience with the 3800XT?
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post #2 of 71 (permalink) Old 07-26-2020, 04:36 PM
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Well there is no way you should be idling at 50c. That implies a bad mount.

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post #3 of 71 (permalink) Old 07-26-2020, 05:45 PM
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Quote: Originally Posted by Redwoodz View Post
Well there is no way you should be idling at 50c. That implies a bad mount.
There is absolutely a way. That's what Ryzen 3000 does.

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post #4 of 71 (permalink) Old 07-26-2020, 05:48 PM
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check the mount and the spread of the paste.

is the cooler new and did you remove the coldplate sticker?
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post #5 of 71 (permalink) Old 07-26-2020, 07:24 PM
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I ran across this https://www.computerbase.de/forum/th...#post-23316767 power plan and it is the best at keeping idle temps down without affecting performance.

For the fan speed use the Bios "smart Fan 5" or install Gigabyte SIV.
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post #6 of 71 (permalink) Old 07-26-2020, 07:30 PM
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Also check to see if PBO is enabled by default. On my motherboard the BIOS settings default to both case fans & CPU fan on a low power "silent" profile, in addition to defaulting to PBO "on" which when the two are combined is really not a great thing in my experience.

On my 3900X I was idling at 50C+ and under load was seeing 94C - I disabled PBO until I got the heat issues figured out, and set the fan profile to "performance" and this immediately fixed my severe heat issue.

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post #7 of 71 (permalink) Old 07-26-2020, 07:46 PM
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Quote: Originally Posted by polar View Post
I ran across this https://www.computerbase.de/forum/th...#post-23316767 power plan and it is the best at keeping idle temps down without affecting performance.

For the fan speed use the Bios "smart Fan 5" or install Gigabyte SIV.
This did affect performance for me in a weird way: noticed some lag while moving the mouse over desktop icons and drives in This PC.

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post #8 of 71 (permalink) Old 07-26-2020, 07:57 PM
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Quote: Originally Posted by rares495 View Post
This did affect performance for me in a weird way: noticed some lag while moving the mouse over desktop icons and drives in This PC.
I noticed that too, if I was using the EDO bug, but at default settings or manual over clock it work good for me.

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post #9 of 71 (permalink) Old 07-26-2020, 08:07 PM
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Quote: Originally Posted by polar View Post
I noticed that too, if I was using the EDO bug, but at default settings or manual over clock it work good for me.
In my case, it happened with PBO on Auto with my old 3700X. Figured it was the plan and the issue was gone after switching back to high performance/balanced.

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post #10 of 71 (permalink) Old 07-26-2020, 09:14 PM
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50°C idle is about right.

Go into the BIOS and make sure PBO (Precision Boost Overdrive) is disabled, and make sure no other overclocking options are enabled.
-
Ryzen 3000 series tend to run hot - it's just how they work. I recommend creating a custom fan-curve in your BIOS, and keep the fan at low speed until 65°C or so, and then have it gradually ramp up to max speed by 80-85°C or so.
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