The AMD Radeon is a GPU but kind of weak compared to an RTX 3070. Not all 4K requires a lot of bandwidth. A single mechanical hard drive can edit multiple layers of 4K H.264. If you want to edit multiple layers of Red One R3D 4K files, Pro Res 4K or even BRAW a SATA HD RAID setup would be the best bang for the buck. My i9 9900K and RTX 2070 can edit any flavor of 4K using Premiere Pro or DaVinci Resolve. That being said AMD CPUs will work but they do not have Intel's Quick Sync but niether do the Xeon CPUs. Any 8 core CPU should work and any $400.00 GPU should work. The video might be worth watching.