In the dropdown at the bottom you could try selecting your other card to see if it's doing anything. If so, then it's using the other card, if not, then it's using this card, but not to its full effect. It is running at full GPU clocks, although the memory isn't.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT