So I ran across this video as I was looking to upgrade my PC: 8K Video Editing BEAST! - 16 Core ThreadRipper for Premiere Pro and Resolve - YouTube The impression I received from the video was you would be able to playback and scrub 4k, h.264 media, without needing to transcode or proxy anymore.  So I built a very similar machine, but was very sad to find that though playback was solid, scrubbing still chugs badly.  I know that h.264 is very poor for editing in general, but I was hoping to make proxies or transcoding a thing of the past. Diving into deeper research, I saw that Threadripper isn't actually the best choice for premiere, I would been wiser to get an Intel 9900k, based on Pudget's tests. My question is, are any of you able to edit 4k h.264 (like from a GH4, Sony A7SII etc) with smooth playback and scrubbing without proxies or transcoding?  If so, what kind of hardware are you running for it?  Furthermore, which hardware components have the greatest effect on scrubbing performance? My specs in case anyone is interested: CPU: AMD Ryzen Threadripper 1950X 3.4 GHz 16-Core (32 threads) GPU: EVGA GeForce GTX 1070 SC GAMING Black Edition RAM: Ballistix 64GB Sport LT Series DDR4 2666 MHz Boot Drive: Samsung 250GB 970 EVO NVMe M.2 Internal SSD Scratch Drive: Samsung 250GB 970 EVO NVMe M.2 Internal SSD Media Drive: Samsung 1TB 970 EVO NVMe M.2 Internal SSD ... View more