Originally Posted by Raze

In the Catalyst Control Center, try switching the D:OS executable to integrated graphics. If the performance drops (or the game just crashes trying to load), the 0% load on the discrete graphics could be a bug in GPU-Z. If the performance is the same, switch the setting back to high performance and see if that helps.
You could also try setting it to automatic, and see if the game picks the discrete graphics then, even though it doesn't appear to when it is specifically told to.


Performance was noticeable worse when set to "power saving", but I couldn't test automatic because there isn't a setting that facilitates this. It appears that once you have assigned a setting to an application from within CCC you don't have the option of reverting it to "unassigned."

So yeah, maybe it's a bug with GPU-Z after all... Although it picks up the load for other games just fine, so...