https://bugs.winehq.org/show_bug.cgi?id=40993
--- Comment #3 from Benjamin Hodgetts ben@xnode.org --- Just tried this on the same machine using GIT kernel and GIT Mesa, using the open-source RadeonSI driver on a RadeonHD 7770 and got exactly the same result, still stuck at around 12fps. So it doesn't seem to be GPU specific.