Long story short, almost the same problem.
Gigabyte R7 360 2gb, cpu i3 540 3,07 GHz, motherboard ASUS h7p55, 8gb ram, windows 10 x64, drivers right now 16.6 crimson.
1. 3 days ago started having problems with frame drops in Overwatch, droping from 60 to 15. Had some windows 10 issues, bugs, decided to reinstall the system.
2. Fresh win 7, up to date, installed newest amd drivers, Blizzard games did not see the gpu, Torment Tides of .. pink screen. Used DDU and Amd Cleaning Utility, installed older drivers. Games started to work but still with frame drops.
3. Installed windows 10, same story, new drivers did the same, some older worked but frame drops again. Another DDU cleaning and during drivers install cant find my GPU so drivers didn't installed. Removing GPU in windows manager, GPU came back after reboot with drivers I have now. Games work, still frames act like crazy. Temperature of cpu and gpu in games are ok. Hard drive scanned, no problems found. No idea what can I do more. Can paste DxDiag if needed.
Same problem and symptoms here. The only 2 games confirmed to work are R6S and Warthunder. The rest just report unknown errors or cannot find graphic device. Seems to occur in both 4.4 and 5.1 updates
GPU: Crossfire-ing between an ASUS R9280X-DC2T-3GD5 and a HD7970
CPU: i7 3820 3.4GHz
Motherboard: X79 series
PSU: An EVGA 1000W
Operating System & Version: Windows 7 64-bit SP1
Driver Installed: 17.4.4/17.5.1
What I've tried: Reinstall, Clean Install, DDU uninstall then clean install. All games integrity checked with no problem/corrupt AFTER run.
*System was update from 4.2 version.
Too bad I didn't keep the installer to downgrade.