To handle complex video rendering tasks, especially with 4K content, the aspect of the video card that becomes paramount is the memory bandwidth. A higher memory bandwidth means that the video card can handle the large amounts of data required for high-resolution video processing more effectively. Though the size of VRAM is also essential, without adequate memory bandwidth, the card may become a bottleneck regardless of VRAM capacity. This is particularly important when working with larger video files that may require quick access to and from the card's memory. Additionally, bus interface and thermal design power (TDP) are important but secondary to the immediate need for a higher memory bandwidth, which can facilitate faster data transfer for video rendering tasks.