Gfx: Sapphire R9 390
OS: Win10 Pro x64
CPU: 5820K, optionally @4.5 Ghz
Add. Software: MSI Afterburner for ingame monitoring purposes
Running into the same issue and it's really annoying the hell out of me.
I'm back to the latest catalyst just because of the vsync problem.
The exact symptoms of the issue are:
When Vsync is enabled, the GPU clock will no longer be raised to a level, where 60FPS (my monitor refresh) would be constantly displayed, even though there would still be plenty of headroom to achieve so.
Example (Heroes of the Storm):
Vsync DISABLED: 60-90 FPS // Clockspeeds: (GPU/RAM) 1010Mhz / 1500Mhz
Vsync ENABLED: 35-45 FPS // Clockspeeds: (GPU/RAM) 450-650Mhz / 1500Mhz
So even though the "Horsepower" would be there to display a constant 60FPS, it won't happen, as the drivers do not raise the GPU clock in a reasonable manner.
At first i thought it would be an issue with this particular game, but so far it has been reproducable with any other title i tried.
This issue is already reported and known to AMD ever since crimson was released, and still, there is nothing being done.
A true disappointment.
On a sidenote:
I also tried disabling Vsync and enabling the "frame rate target control" to 58,59,60,61 and finally 62 FPS, from within the Crimson driver.
In all cases, tearing will _still_ occur, so that it can not be seen as a viable workaround.
