I have long wondered whether I should buy port version for the fan, the Port 16 or 24. On the manufacturing side, I have looked up the specifications, here at the hardware version was 7 Fan> No. Thereupon I ordered the 24-port version. I bought got directly from Amazon, the hardware version 7.3. As stated by the manufacturer, this version has no fan! Otherwise, the switch does what he should. Flawless and quick function! Speed test between two computers (Windows 7, i5-2500K and i7-2700K, each with SSD) via Cat5e patch cables (2x 15m) + patch cable: Speed keeps constant between 111-116 MB / s. Since I wanted to test the pure transfer rate, I've tested with a single 12GB file. For me, currently the best value for money if you need a non managbaren Gigabit switch with 24 ports, or want