TechPowerUp posted a review on the QNAP TS-470
A quote from the article:
QNAP recently released their new TS-x70 line, and in this review, we are going to take a look at the TS-470, a 4-bay NAS suitable for SMB (Small and Medium-sized Business) environments. QNAP even claims this server to be capable of offering higher than 400 MB/s read and write speeds.QNAP TS-470 @ techPowerUp