I've heard many complaints and bad reviews about 5.12 and how it's even worse than the previous driver.
What is currently most stable?
Operating Systems: Windows 10 64 bit
Processor: i5 6600k
Motherboard: Asus Z170-AR
Memory: Kingston HyerX Fury 8GB Kit (4Gx2) DDR4 2133
Power supply: Thermaltake SP-750PCBAU Smart 750w 80+
VGA: R9 390 Sapphire Nitro TRI-EX
Do you mean the Crimson 15.12 driver? We hope to have a new driver update available soon. If you are experiencing issues, please report them here and consider rolling back to an older Catalyst driver.