Before revision: These machines are often high-spec PC computers with high-speed hard drive technologies such as RAID arrays or solid-state drives, multiple GPUs and optionally a video capture board to allow mixing live video with recorded content and real-time effects " .
After revision: These machines are often high-spec PC computers with high-speed hard drive technologies such as RAID arrays or solid-state drives, multiple GPUs and optionally a video capture board to allow mixing live video with recorded content and real-time effects .