Because we don't have an ASRock branded board, we were only able to scan it to be sure it was clean and check the internet for reviews from users. Websites including Anandtech and Superuser say it works best on USB 2 drives and smaller transfers so USB 3 users might not see much of an improvement. Naturally, ASRock claims success on their boards so this one is up to you if you were hoping for a review. We're confident that it does work only based on our research.
ASRock XFast USB is downloaded as a zip file with a setup and a silent mode batch file.