If you are struggling with DirectX 11 errors, your best bet is to look at robust, modern alternatives like dgVoodoo 2 or DXVK. They are safer, more powerful, and actually designed to speed up your games, not just mask an error code. If you must use the original dxcpl.exe , you are far safer downloading the official Microsoft Windows SDK from the Microsoft website rather than hunting for an unofficial 2021 repack from an unknown source.

Since the CPU is doing the heavy lifting for the GPU, it becomes a severe bottleneck. Your processor will likely be pegged at 100% usage while your graphics card remains mostly idle. For this to even be a testable concept, users are advised to have a very strong CPU (at least an Intel i5, and an i7 is highly recommended). Even then, performance will be poor.