@weirdami
I was under the impression that MMU made rendering faster. Or am I thinking of CPU?
Neither affect rendering speed at all, unless if the program in question supports MMU or FPU.
MMU can be used to detect changes in the framebuffer, and only c2p or c2ham the changed areas. This greatly improves speed of mac emulation display refresh for example. But you still need to use the MMU enhanced display driver for the emulator.
Other than that MMU has no effect on rendering speed.
It's the same for FPU. FPU in itself has no effect on rendering, but the actual math behind some rendering can benefit from it. Again, it only happens if the code supports FPU.