My setup: 1700x ryzen, msi x470 gaming plus, rx470 reference Kdenlive does not have an official system requirement.
I have worked with some 1080p footages, the rendering did not saturate my 1700x, only hovering around 25% - 50%. Could be higher for 4k. You should at least have 16GB of ram(i have only 8gb, had to close kdenlive before rendering) . I saw a post on the forum (quite dated), there seems to be some bugs around gpu rendering, in conjunction with multithreading, causes render to stuck at 99%. I would agree with Jacob on gpu rendering in general. However, software render produces higher quality render than fixed function hardware so you might as well use the cpu if time permits. The backend of kdenlive, mlt does not have dedicated developers at the time being. Everything is supported by the team who uses mlt (kdenlive included), so I wouldn't count on gpu rendering for the foreseeable future. The same thing should apply to other NLE that uses MLT as well ( such as flowblade ) -Thompson
