Updating DirectX alone is often not enough. For the best performance, combine it with these essential updates:

Before diving into the "how," it is essential to understand the "why." Emulation is a resource-intensive process that demands near-perfect synchronization between the software and hardware. Unlike native PC games, which are built to run on a variety of systems, emulators are trying to mimic a closed-console environment.

Beyond error prevention, updating your DirectX libraries unlocks tangible performance gains:

Microsoft maintains a legacy web installer called (June 2010). Despite its age, this package contains all the missing DX9, DX10, and DX11 legacy libraries.

from Microsoft (search for DirectX End-User Runtime Web Installer — file name: dxwebsetup.exe ).