It's increasingly harder to get it working on 4000 series. Anything can break it for no apparent reason. The driver gets into a very unstable state when running Outerra, and whether it will render anything depends only on random fluctuations and order of operations etc. Like when Abc94 got it working for one run. He thought that Avast was responsible, so he tweaked Avast settings and run the app repeatedly to see if it helped. In one case it did indeed run, but it was not reproducible. Confusing.
Additionally, with the financial problems at AMD and how they try to solve them we are losing our contacts, moved to different positions and/or loaded with more work. Support for cards older than 5000 is totally out of question, and even fixing bugs for the newer ones gets longer and longer. You can expect 6 months until a reported bug appears fixed in a public driver release, if it's considered fixworthy at all.
So .. decide for yourself.