I'm right on the verge of needing to build a new PC in order to keep of with the demands of 4K video editing. Previously my setup (Intel i7-2670QM, 2GB AMD Radeon HD 7690M XT, 500GB 840EVO SSD, 8GB DDR3, Samsung S34E790C) has been enough to handle 1080p editing. However, 4K is really taxing on...