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Is 76°C a too hot idle temperature for my radeon r9 380?

That's pretty warm for a 380 at idle. I have a 390 that doesn't even hit that at load.

Is the airflow constricted around the video card (i.e. is it too close to the bottom of the case/power supply and/or is the card overclocked? Otherwise it could be defective fan/slow auto fan speeds (check and adjust manually using Afterburner) or misapplied thermal paste from factory, defective sensor, etc.

You could try undervolting and underclocking the card if everything seems to check out and it's just poor airflow around the case. Or add more system fans if you have the room.
 
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I got a 380X system, and it is 30C idle. Room is 75F (24C)
What is your airflow like, are the fans dirty?
What is the external temp of the room?
 
My sapphire nitro 380x idles at 34c and goes to 68c under load. So if yours is really at 76c at idle then there is something wrong. Are the fans coming on properly? Is their crud between the heatsink fins? Do you have good thermal paste on and the proper amounts?
 
76°C is extremely hot for idle. Are you sure it's idle. Maybe some mining virus consume your GPU. Check GPU load. If it's really idle, then you have some serious problems with fan, thermal paste or GPU itself(maybe it's defective). Maybe it's the sensors' fault.
 
https://www.foodsafety.gov/keep/charts/mintemp.html
76C is about 168F

Its too much for Beef, lamb, goat, pork, venison or other mammal based meat.
its MUCH too much for seafood.

Its good for chicken. If you video card was actually a chicken that you planned to eat, then 76C is a pretty good temperature.

Video Cards aren't food, so, I'm not sure if 76 counts as "burnt" or not.
 
That's a load temp I would expect after a long-ish gaming session for most GPUs, NOT an idle temp. Something is up.
 
I would get goofy temps climbing up when not under load to about 54C so I installed Sapphire TRIXX to set custom fan profile. Now fans about 20% and 31C. Sometimes that AMD driver just doesn't like my computer. Great air flow, etc. It just keeps the fans on super low.
i7 4790k Gigabyte Z97X Black R9 380 Nitro
 
Edit: little bit of a necro...

Yeah, I agree with everyone else that is way too hot.

My 980ti idles in P0 (higher power) state due to 4 monitors and Nvidia's crappy "fix". It eats 95 watts at idle and it only sits around 45-50C depending on ambient.

You should physically check your card to make sure it's not dust-ridden and the fans are spinning. Then you should check your GPU load with something like GPU-Z to see if it's actually idling or running some kind of load on the side. As others have mentioned, you could actually have mining malware running computations on your card.
 
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