(Opens in a new window) Read Our Zotac Zbox Sphere OI520 Plus Review Zotac does include instructions on how to get to the internal drive and memory slot, should you wish to upgrade, but you'll have to replace the existing memory card, since there's only one SO-DIMM slot. We foresee running out of active memory if you, say, tend to keep more than a couple of dozen open tabs in your browser, plus several instant-messaging or Skype sessions active at the same time. The meager amount of memory, which is likely due to Zotac wanting to keep the system price low, is more of an issue. The 64GB seems a little slim if you're a video collector, but you should be fine if you're planning on streaming all of your music and movies. You'll likely need the eSATA or USB 3.0 ports for an external drive if you're thinking of using the Zbox CI320 as a traditional home-theater PC. The system includes audio ports, a DisplayPort, an eSATA port, an Ethernet port, an SD card reader, two USB 2.0 ports, and four USB 3.0 ports. The system can be mounted on the back of a monitor or HDTV using an included VESA mounting bracket. Like other mini PCs that can be hooked up to an HDTV, the Zbox CI320 comes with a HDMI port. Since 1982, PCMag has tested and rated thousands of products to help you make better buying decisions. That said, its size is in line with the Intel NUC (Next Unit of Computing) Kit D54250WYK ( at Amazon) (Opens in a new window) and is much smaller than the Apple Mac mini and Polywell i2304-i5. The black metal chassis is a bit utilitarian-looking, particularly when compared with the spherical Zotac Zbox Sphere OI520 Plus ($410.99 at Office Depot® & OfficeMax®) (Opens in a new window). The Zbox CI320 has very compact chassis, measuring about 1.75 by 5 by 5 inches (HWD), not including the external antenna for the 802.11ac Wi-Fi. It comes with a quad-core Intel Celeron processor and a 64GB solid-state drive (SSD), which helps quell the perception that all budget PCs are slow and sluggish.While bare-bones, it is a fully functional Windows 8.1 system, something you can't say about the similarly compact Asus Chromebox M004U ($69.99 at Amazon) (Opens in a new window). The Zotac Zbox CI320 nano Plus Windows 8.1 with Bing ($249.99 as tested) is an inexpensive mini desktop PC aimed users with basic computing needs. Needs more local storage for video files.How to Set Up Two-Factor Authentication.

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