UPDATE:
The following issues seem to be fixed with the recently released 19.2.3 Adrenalin drivers.
------------------------------------------------------------------------------------
Greetings,
I just installed the latest 19.1.1 beta driver and noticed a weird and even gamebreaking issue in World of Warcraft, running with DirectX 12 API setting. Flying around in busy Stormwind causes heavy stuttering in shorter periods, the screen freezes for a second or two, goes back to normal, stays like that for a few more seconds, before it freezes again. The game eventually crashes, with Windows 10 showing an error notofication:
"Access to graphics hardware has been blocked for wow.exe."
I noticed within Wattman, every freeze causes a massive clock spike in a negative way: The clocks reset to lowest P-State, before stabilizing for a short time, just to spike down again. I know it's not much, but here is a screenshot showing the issue:
Bild: 19-1-16xfcy.jpg - abload.de
As you can see, there is a spike quite soon after I started the game, which is when the picture froze for the first time. Got back to normal, moved around a bit, the next three spikes caused freezes in short periods, again before going back to normal. The last spike crashed the game, giving me the error notification stated above.
Now I reinstalled the 18.12.3 drivers, and everything works fine as usual. I again decided to try the 19.1.1 Beta, this time however I went for a clean, "new installation". The issues appeared again, regardless of the Wattman settings by the way, doesn't matter whether "Balanced", "Turbo", "Energy Saving" or "Custom" is set.
Again I reinstalled the previous 18.12.3 drivers and the game works just fine.
My system:
Mainboard: Asrock X370 Gaming Professional (5.10 BIOS)
CPU: AMD Ryzen 7 2700X
RAM: 32 GB G.Skill RGB optimized for Ryzen, running at 3200MHz
GPU: Sapphire Radeon Vega 64 Nitro
OS: Windows 10 Home 64 Bit (latest official version)
SSDs: Samsung 960 Evo NVME, SanDisk Ultra II SATA, Crucial MX500 SATA
HDDs: Samsung 500 GB SATA, WD Blue 1 TB SATA
GPU drivers: Radeon Adrenaline 19.1.1 / 18.12.3
Chipset drivers: 18.10.1810