The ARCTIC MX-4 thermal compound is generally suitable for use on various processors, including CPUs and GPUs. It is metal-free and non-conductive, making it safe for use on the Ryzen 7 5800X3D. The paste offers high thermal conductivity and is easy to apply, making it a good choice for overclockers and enthusiasts.
There are no specific restrictions or warnings that would preclude its use on the Ryzen 7 5800X3D. Therefore, the MX-4 paste is suitable for the Ryzen 7 5800X3D.