Hello, im having this weird problem since i brought my new GPU a few months ago, my whole build is new, the GPU was the last purchase, previously i had a R9 290x in this same build, all works perfectly!
The crash is sometimes a black screen on all monitors and fans turns 100% speed, nothing to do here just force shutdown, sometime i got a blue screen with the message, THREAD STUCK IN DEVICE DRIVER.
All this happens randomly, between 1 hours to 4 maximum, while gaming and casually browse on my second monitor.
i have tried all the possibilities, clean windows install, a lot of drivers versions 18.x.x / 19.x.x, diferente pci-e socket, diferente PSU, two diferents power rails, undervolt, power limit +50%, GPU and motherboard BIOS update, basically all known tricks.
My systyem:
- AMD Graphics Card
- Vega 56 Gigabyte OC version gigabyte.com/Graphics-Card/GV-RXVEGA56GAMING-OC-8GD
- Operating System
- Desktop Windows 10 64bit
- Driver version installed
- 19.11
- Display Devices
- LG IPS FULLHD (1920x1080@59Hz Active DP to HDMI adapter
- 23MP55 (1080x1920@59Hz) HDMI
- HISENSE (1920x1080@59Hz) HDMI
- Motherboard + Bios Revision
- Z370 AORUS Gaming 5 + Bios F10
- CPU/APU
- Intel Core i7 8700k
- Power Supply Unit Make, Model & Wattage
- Seasonic 750W Gold
- RAM
- 16GB Gskyll 4133hz
EDIT UPDATE:
The only solutions that works is the driver 17.11.1
https://www.amd.com/en/support/kb/release-notes/rn-rad-win-17-11-1
whql-win10-64bit-radeon-software-crimson-relive-17.11.1-nov10.exe - Google Drive
EDIT UPDATE 2020
I have been testing the new bios, for a week i think, no crashes.
UPDATE THE BIOS USING THIS VGA Bios Collection: Gigabyte RX Vega 56 8 GB | TechPowerUp (or search for your manufacturer if its not Gigabyte )
Im using the default settings, with the lastest driver version, turned off zero rpm, changed the fan speed and power limit -50%
EDIT UPDATE MID 2020
Radeon pro drivers seems to fix all problems 
