Armory Crate Aura Sync is controlling my DIMMs, case and fan lights, as well as the motherboard itself. I tried Aura Creator but it did not see my DIMMs, so that was a disappointment.
I went ahead and installed the Gigabyte software and it actually feels fairly lightweight and is controlling the GPU nicely. It didn't detect or try to control anything else, I think it's aimed just at the video card, which is nice.
So problem resolved.