After user complaints most GPU makers pulled back from 100%.
100% FAN DOES NOT DAMAGE A GPU. It's more of an user annoyance and I've seen this in NANO CASE BUILDS which you may not want to read my opinion on.
So here's the rundown with me leading with I can't know which is the fix since there are some thousand thousand GPUs out there. ASK THE MAKER IN SOME CASES.
1. Check with the maker about the issue and the GPU firmware.
Explanation: When the PC boots the GPU must play it safe as if the PC crashed from an overheat situation. Originally the engineers set it to 100% to be safe. PC owners pushed back and now I see this at 50 to 80% speed with a few expensive cards reading the temp and the fan speed is tied to temp.
2. BIOS and PC drivers.
Now that W10 can replace your drivers without asking you have to disable that when you suspect driver issues so you can regain control. How to disable this is on the web then you can update in order: BIOS : MOTHERBOARD DRIVERS : GPU DRIVER.
3. About the concern:
I can't tell you much beyond the GPU shall withstand 100% fan speed. Or it's ¢rap.
I'm fairly new to building computers, and this is my first build. It was working perfectly until I recently decided that I wanted a second monitor. This monitor is a 1920x1080 Viewsonic monitor connected through a DVI port straight to the GPU. The computer acts perfectly normal while powered on, but when it goes into sleep mode, (more often if it wasn't doing anything intensive), the GPU fan spins up to 100% for about 30 seconds. The thing sounds like it's trying to take off. There's about a 5 minute delay, then it comes back for 25 seconds, then 20, etc. until it just stops. This happens roughly one in four times I let it go into sleep mode, and starts after a delay of 5-10 minutes. I'm concerned that I'm damaging the GPU by letting this happen. What's going on, can I stop it, and should I be concerned?
Motherboard: Gigabyte Z390 Aorus Pro Wifi
CPU: Intel core i5-8400 @ 2.80 GHz
RAM: 16 GB Mushkin DDR4
GPU: AMD Radeon Sapphire Pulse RX 580
Power Supply: 800W Gold Rated
I'm running Windows 10 Pro 10.0.18362 Build 18362.
I have checked, and I'm on the latest BIOS and newest drivers.