Whack this URL into Google Translate if you don't sprechen Deutsch: http://www.computerbild.de/artikel/cbs-News-Playstation-4-7712087.html
Have a look in the Gallery and scroll through what appears to be the 'Comments' posts for more info.
5400rpm HDD seems a little poor (maybe the benefits of 7200rpm aren't high enough compared to potential lifespan). At least we can replace it with a 2.5" SSD for a speed boost.