Any and all software can benefit from faster ram speed. While it may not make a direct FPS impact to go faster, it will be noticeable in things like loading, changing scenes, opening options screens, if your GPU runs out of memory for textures, etc.
If you use a discrete graphics card, there is little difference in performance.
Particularly with modern Intel processors.
AMD processors do depend on faster ram., but I do not think any can use ddr4.
If you are using an integrated graphics adapter, dual channel and higher speed makes a big difference.