Hi! An old thread has been already create about that. But my GPU is 1% used when I render, and my CPU 25% ! I have a i7-4770K slightly overclocked, a GTX 970 and 16GB of RAM. It was during a render with SEUS Ultra and Conquest pack.
Thanks!
The rendering is already multi-threaded, so the "problem" is not that the replaymod can't utilize your CPU, but that Minecraft can't so it isn't the replaymod's fault.
