It is a little larger than the intel NUC it is replacing. See pic. But I am not unhappy because it has many more ports and is still a compact package. It kind of looks like a car audio amplifier, that’s the vibe the heat sink package gives.One nice thing is it has actual serial Com ports. I had a couple of cables for my telescope that use serial ports and I had to have USB to serial adapters. I don’t with this.Also you get 4 USB 3.0 ports on the back and 3 ISB 2.0 on the front. I use the front ones for keyboard and mouse and the back ones for my CCD cameras.I installed the SSD that came out of the NUC straight in and Windows 10 found all the ports. I didn’t have to do anything like ‘sysprep generalize’ command beforehand. It just worked.