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The 10 Best Horizontal PC Cases in 2022

Reviewing the best picks for home theatres, horizontal cabinets and more
Horizontal PC Case

We updated this feature in June 2022. After reviewing the new options on the market, our top picks remain the same. We’ve seen a couple of our choices run into stock issues, so we’ve included some alternatives where relevant.

I know what you’re thinking:

“Where are all the horizontal cases amongst the thousands of vertical options?”.

Up-front options rule the market, and it’s difficult to find a good sideways case for all of you looking for something a little different for your next HTPC, VR, gaming, or server build.

But fear not, they do exist! And after some extensive reviews, we’re going to break down the top picks in this unique category.

A note on size

Before we jump in: many horizontal cases are on the smaller end of the scale. Whether you’re looking for a full tower or something for ITX, we’ve covered all the options below. Just remember to check that the dimensions of the parts you’re looking at will fit.

So, without further ado:

SilverStone Technology GD09B

Overall Best Horizontal PC Case


Form Factor: Mid Tower | Motherboard Support: SSI-CEB, ATX, Micro-ATX | CPU Clearance: 138mm | GPU Length Clearance: 309mm | Dimensions: 440 (W) x 170 (H) x 358mm (D) | Weight: 4.2kg | Radiator Support: 120mm | Fan Mounts: 5


+ Fantastic build quality

+ Decent layout for HTPCs & compact gaming builds

+ Good price

 − Finish can be a bit of a fingerprint magnet
 − GPU space is tight for larger cards
OUR RATING: 9.5/10

Offering both style and substance at a great price point, the GD09B really excels on multiple levels.

From a company that has specialized in building horizontal cases for over a decade, the GD09B has an impressive layout for hardware considering its small dimensions and horizontal orientation, with the ability to support up to an ATX motherboard.

7 expansion slots are available for the case. With support for 1 x 5.25″ external and 2 x 3.5″/ 1 x 2.5″ internal drives, there is decent room for your various storage needs.

SilverStone Technology GD09B

Source: stevoisboss

With the compact nature of most horizontal cases, you may have to decide what is most important to you (e.g. drive bays in these cases often come at the cost of fan mounts or GPU space).

The case is surrounded by decent ventilation. This, combined with the reasonable size, allows for builds to run cool with good airflow. This is the ideal pick for a Home Theatre PC/HTPC build as you can keep fans at a lower speed due to the natural cooling capabilities of the chassis (smaller water cooling options are available too, but we think a fan build makes the most sense here).

We also really appreciate that despite the compactness, the GD09B still boasts room for a GPU up to 309mm. Many of the latest cards will fit into this space (but be sure to check dimensions of your desired pick).

We also highly rate the GD09B due to its sophisticated aesthetic and fantastic build quality. Along the front of the case are 2 USB3.0 ports, audio inputs, and a very sleek-looking drive bay. 

This SilverStone offering manages to ticks so many boxes. Considering it’s far from the most expensive on the list, it’s the amount of value on offer that seals the deal as our top pick. If the design fits your idea of what you want from a horizontal motherboard case, we think you’ll love it.

2022 mid-year update: The GD09B continues to our top spot for 2.5 years running. The product listing we’ve linked to is sometimes low on stock. If this is the case for you, be sure to check the other versions (version 2/version-USA) on the same page and duplicate product listings on Amazon. These are very similar and are perfect alternatives.

Cooler Master HAF XB EVO

Runner-Up Best Horizontal PC Case


Form Factor: Mid Tower | Motherboard Support: ATX, Micro ATX, Mini ITX | CPU Clearance: 180mm | GPU Length Clearance: 334mm | Dimensions: 442 x 330 x 423 mm | Weight: 8.2kg | Radiator Support: 240mm | Fan Mounts: 5


+ Great value

+ Generous CPU cooler/GPU clearance for its form factor

+ Decent build quality


 − Nearly twice the height of the GD09B
OUR RATING: 9.5/10

We didn’t quite want to give this Cooler Master pick the top spot partially due to its slightly more square/cube shape.

However, know that if this fits your idea of a horizontal case aesthetically, you’re going to be in for a treat, This chassis is a beast.

Somehow this unit manages to host capacity for up to 2 x 5.25″ drives, 4 x 3.5″ drives, and 4 x 2.5″ drives. If you don’t need all that in your build, then it’s simply more room for other parts to breathe/fit!

The case has room for plenty of airflow/cooling (up to 5 fans, with 2 XtraFlo fans pre-installed) and space for a modest set of water cooling radiators.

Cooler Master HAF XB EVO

Source: taddtorborg

Included on the front panel are the usual I/O connectors (2 x USB3.0/audio ports). We’re pleased to see that the build is largely made of thick steel. The feel/quality of the HAF XB EVO is superb and it comes across even better in person.

One big plus for novice builders: this case was designed for you. Some features have been included to make the build process as easy as possible. Most notably screwless installation and a removable motherboard tray (trust us: trying to install a PC in a more compact case can be a pain, so this is a massive plus!).

Cooler Master HAF XB EVO vs SilverStone GD09B: When considering our two top picks, the big decider will be on aesthetics and dimensions. Which better fits your idea of a horizontal case? We prefer the look of the GD09B, but it’s really the personal choice that matters most.

Aside from that, the key secondary factor is if you’re looking for a gaming PC case. The HAF XB EVO has significantly more room for your CPU cooler and GPU. If your heart is set on the GD09B, you can certainly make that work for a powerful gaming build, but it will require a more careful selection of hardware.

With a great balance between cooling, space, ease of use, and high-quality build/design, the HAF XB is a fantastic option all-around.