Device manager is literally the worst place to be looking for video card driver updates.
Get your driver updates directly from amd.
1. You are running the 32 bit version of OBS on a 64 bit system. This will reduce performance and greatly increase the risk of crashes due to memory limitations. You should only use the 32 bit version if you have a capture device that lacks 64 bit drivers. Please run OBS using the 64-bit shortcut.
2. Run OBS as Admin.