The PC case is the clearest representation of your build’s aesthetic, but it serves a few other crucial functions. The case protects the hardware from dirt, dust and snags, and helps to move air around the components for optimal cooling. The case also stores and protects mass storage devices, such as hard disk drives or solid-state drives.

There are a variety of PC cases on the market, from the behemoth Corsair Obsidian 1000D to the simple and affordable Masterbox 500B. In the sub-$150 price range, it’s a good idea to look for a case with front USB ports and rear power-supply connections to minimize cable management issues. It’s also worth seeking out a case with at least two fans—one on the front and one on the back—for optimum air-flow, which will help keep the motherboard cool.

If you’re looking to build a gaming PC, you’ll want to prioritize compatibility with full-size components like large graphics cards and high-performance CPUs. A mid-tower case is usually the best choice, as it has plenty of room for most video cards and provides a great starting point for your rig.

Many newer cases feature side panels made of tempered glass, which gives you an unfettered view of the hardware inside. However, it’s important to note that tempered glass is quite fragile and requires extra care. Alternatively, there are many cases that have front windows that don’t compromise on air flow. You can also find a number of cases that have large cut-outs in the motherboard tray for water-cooling reservoirs, which are a huge selling point for some users.