BenchmarkReviews.com: There is a glass ceiling in the world of NAS devices, and like all glass ceilings it's not that obvious until you bang your head against it a few times. The standard-issue network interface in the IT world is a one Gigabit Ethernet connection. Convert bits to bytes and you end up with a less impressive sounding 125 MB/s interface. The ceiling comes into play quickly, because even a single 3TB HDD can push 160 MB/s through its SATA 6GB/s interface, when it's running hard. I was a little frustrated when I did an extensive review of the QNAP TS-879U-RP Turbo NAS server last month, because I didn't have a network environment that could unleash its full performance. Now that I do, let's take a look at what it takes to get this corporate animal up to full speed.