I encountered a bug in driver 18.12.2, causing the memory to run at 167Mhz at all times. Normally, my memory is clocked at 1000Mhz both in min-state as in max-state.
This offcourse resulted in very low framerates ingame.
Another issue with the latest driver is that I get notifications in windows that a certain comatability check is offline, or that I have no internet connection, while I am connected to the internet. I even get the message while viewing YouTube videos.
I reverted back to 220.127.116.11 and no more issues or notifications in Windows.
PS: The auto-overclock does not work at all. It just made my system crash.