For example, Fractal Design’s curvy Era ITX can hold ATX PSUs and standard-height graphics cards. It also has options for adding small AIO liquid coolers. And the Phanteks referenced below is essentially a scaled-down little tower.

To make looking over Mini-ITX cases more manageable, we’ve opted to organize them into five rough design types. Not all Mini-ITX cases will fit into one, but most do, and this scheme gives you a solid idea of the options out there. Style 1: The Horizontal Console Style The Tower 100 is a vertically designed case constructed with solid steel all around, the vertical design allows the chassis to have a smaller footprint, and helps to minimize obstruction to your gaming and workspace area. The vertical design also helps extract heat from the chassis by using a chimney effect, taking cold air from the base and dispelling the heat via the top. How could it be corrected in a future revision? A vertical motherboard mount like this necessitates the I/O positioning up top, to be sure, but some extender cables to the most commonly used ports (such as to a subset of your USB ports or to the display output) would be very thoughtful accessories to include. Or perhaps some L-adapters for stiff cables like HDMI or DisplayPort. At first, you could easily mistake one of these cases for a larger MicroATX chassis. These are in fact smaller, however, and can’t hold a MicroATX board. This design isn’t as space-saving as most others, but it also means more room inside for hardware. The building process may be easier, too, given the extra interior. Phanteks Eclipse P200A DRGBThe easy answer: It comes down to the components you intend to install. For some shoppers, the look of the case tops everything, and that is fine. Just make sure to factor in some practical considerations, especially if you already own some of the parts. At this point, the wide range of differences that can exist among a pool of Mini-ITX cases may seem daunting. You are probably starting to wonder how this can even be a single form factor at all. A form factor implies that it should be standardized, but in the case of Mini-ITX PC chassis, it’s mostly the motherboard size and shape that keeps this family a family. Even with added LEDs, some more conventional PC cases could make better display cases for computer hardware than this one. The thing is, though: Most of those are ATX, and this is Mini-ITX. These cases tend to be among the most compact, with some designed to support a monitor sitting on top. They also tend to be easier than most to build in, as opening one large side of the enclosure grants easy access to all of the internal hardware.

The second should be the number and kind of drives you intend to install. Most Mini-ITX cases support at least two 2.5- or 3.5-inch SATA drives, but factor in room for what you have. This won't matter if you go all-in on motherboard-mounted M.2 drives, but cramped Mini-ITX boards have room for just one or two of those. Today's PCs come in enough shapes to dazzle a dodecahedron, but in the realm of desktops, three main classes of aftermarket PC case reign supreme: full ATX, MicroATX, and Mini-ITX. These three case “form factors” make up the bulk of the market for modern desktop chassis, and you can simply think of them as big (ATX), medium-size (MicroATX), and small (Mini-ITX). Each of the form factors has its own strengths and weaknesses; in this guide, we’re going to go compact and focus on the Mini-ITX ones. There’s a cut-out in the SSD mounting tray right at the connector that (finally) allows for a real actual unconstrained use of a right angle SATA connector (middle picture below). How about that. Also, I cannot recall right now having an easier time getting power to an SSD. Or a GPU for that matter. Today, we are taking a closer look at their vertically orientated ITX style case that some would say resembles a partially glassed in 3D printer. Actually, I am not going to strongly disagree. But I also have to say, I think I like it. Thermaltake simply calls it: Tower 100. It’s a distant relative to their showy and legacy Tower 900, an E-ATX Super Tower Chassis.

Likewise, pay attention to the maximum length, width, and (potentially) vertical height (full-height versus half-height) that the case allows for video cards. Depending on the card you have, or plan to get, that sizing may be a deal-maker or deal-breaker. Some of the smallest cases don't support a video card at all, and if you intend to rely on your CPU's integrated graphics, this can be a real space saver. (Know, though, that some chips, including many of AMD's mainstream Ryzen CPUs, do not have an integrated graphics processor, and that your motherboard will need to have an appropriate video output.) The third is power-supply compatibility. If you are bringing a PSU you already own to the build, make sure it matches the type (ATX, SFX, or SFX-L) that the case supports and that it isn’t longer than the maximum rated length. While on the subject of measurements, make sure your CPU cooler and GPU will fit, as well; case makers supply those maximum heights and lengths. Setting the aesthetics aside, the case isn’t particularly difficult to work with; we've wrangled with far more difficult Mini-ITX cases in our day. The cooling options are quite limited, however, and the unusual rear I/O panel placement means you'll want to plug in what you must from the outset and mostly rely on your front USB ports from then on out. (Another reason to make sure your motherboard has that modern USB 3.2 Gen 2 header for the USB-C port.) Mini-ITX motherboards measure 6.7 by 6.7 inches, with mounting holes in prescribed locations; Mini-ITX cases, then, are built around accommodating these board dimensions. That said, some Mini-ITX cases are much bigger than others in terms of height or volume. But by definition, a “true” Mini-ITX case won’t accommodate any board bigger than a Mini-ITX one, with the exception of a few that also support the slightly larger (and uncommon) Mini-DTX form factor. Mini-DTX boards are slightly taller than Mini-ITX boards, at 8 by 6.7 inches. (The next biggest size class for motherboards, MicroATX, is 9.6 inches square and defines the next-largest class of PC cases.) A system built into Thermaltake’s The Tower 100 case has potential to be a real eye-catcher. The Tower 100, however, leaves a lot of that work to you. The price is attractive enough, but Thermaltake doesn't give you a whole lot outside the glass (aesthetically speaking, and in terms of accessories in the box) to make it an attractive option for someone looking to build a flashy PC case. It's something of a blank-slate box.

The downside? They also have the most hardware restrictions. Most mandate low-profile coolers, half-height add-on cards (if any cards at all), and SFX (or even smaller proprietary) power supplies. This makes them a poor fit for gamers but an excellent choice for a moderate or light-duty work PC (or an HTPC) that relies on processor-integrated graphics. Externally, that’s about all there is to the The Tower 100 case, but the building experience is considerably different than any other case I’ve worked with so far.

Another option might be to make the chassis a little taller, allowing for more room to access the I/O panel from the rear. Having the rear I/O panel on the top of the PC case is unconventional, but doing this would make getting to the rear I/O panel far easier without significantly changing the design.

In short, that means a Mini-ITX case can be just about anything—and they are. We’ve jokingly called Mini-ITX the least-standardized standard in PC building. That’s because these cases come in myriad designs on the outside, and you never quite know what to expect until you start to work on one on the inside. The motherboard gets mounted vertically in this case, positioned so that the board is on full view through the front glass panel. With all of the glass panels removed, getting access to all of the various headers to get them connected up is made fairly easy; you have easy access from three directions. The same goes for the RAM slots on your board, and the PCI Express slot for your graphics card. For one: The case doesn’t have any LED illumination built in, nor does it ship with RGB or aRGB LED fans. (The two included spinners are, curiously, unlit.) The case will do a good job showing off the parts you install into it, but as you can seee here, our finished build looks rather dull without some LED flair.

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Let’s start with the space issue. Mini-ITX cases come in more unusual, one-off shapes and sizes than other kinds of PC cases, but their one unifying aspect is the class of the motherboard they accept. As noted earlier, the Mini-ITX form factor defines both a size class of motherboards, as well as the cases that fit those boards. Raijintek Ophion Elite