Building a PC that stands out from the crowd often means thinking outside the box, literally. Open frame PC cases have become a go-to choice for enthusiasts who value maximum airflow, easy component access, and a striking showcase of their hardware. Whether you are a seasoned overclocker, a test bench enthusiast, or simply someone who wants a unique desktop setup, choosing the right open frame case can make all the difference. In this guide, we evaluate two standout models from JOYJOM: the Open Air PC Case, PC Test Bench PC Case and the PC Test Bench,Open Air PC Case,Open Frame Computer. Both offer flexible motherboard support and robust construction, but they cater to slightly different needs. We will help you decide which one fits your project best. For more foundational knowledge, check out our PC Cases category for additional insights.

Buying Guide

Motherboard Compatibility and Form Factor Support

One of the first things to consider when selecting an open frame case is the range of motherboard sizes it can accommodate. The JOYJOM Open Air PC Case supports ATX, Micro ATX, and ITX boards up to 305x245mm, making it a versatile choice for standard builds. In contrast, the JOYJOM PC Test Bench goes further by also supporting EATX and even larger workstation boards like X79 and X99, with a maximum size of 330x330mm. If you plan to use a high-end workstation or server motherboard, the latter is clearly the better option. For compact ITX builds, you might also explore our best mini ITX PC cases guide.

Build Quality and Material Thickness

Durability matters when your components are exposed. The Open Air PC Case uses 0.8mm SPCC steel with a black sandblasted finish, which provides decent rigidity for a lightweight chassis. The PC Test Bench, however, steps up the construction with 1.5mm SPCC for all panels and mounting brackets, paired with a 0.8mm base plate. This extra thickness gives the case a noticeably sturdier feel and better resistance to flex during heavy use. If you plan to frequently swap components or transport the rig, the reinforced build of the Test Bench is a wise investment.

Cooling and Fan Support

Open frame cases excel at airflow, but the specific cooling options vary. The Open Air PC Case is minimalist and does not include dedicated fan mounts, it relies on the natural open design for ventilation. The PC Test Bench, on the other hand, supports up to eight 120mm fans, plus multiple radiator configurations: one 360mm, two 240mm, and one 120mm. This makes it ideal for liquid cooling setups or high-airflow air cooling. The maximum CPU cooler height is 165mm, and GPU length can reach 335mm with external fan mounting. For those building a high-performance rig, the Test Bench offers far more flexibility.

Storage and Expansion Options

Storage needs vary from simple to extensive. The Open Air PC Case supports one HDD or SSD, which is sufficient for a basic system or test bench. The PC Test Bench provides room for two HDDs and three SSDs, giving you ample space for multiple drives. Additionally, the Test Bench is stackable horizontally up to ten units, making it a great choice for server racks or multi-node workstations. If you are building a compact system, the simpler case may be all you need, but for future-proofing or heavy storage, the Test Bench is the clear winner. For more on high-capacity builds, see our antec flux pro.

Final Thoughts

Choosing between these two JOYJOM open frame cases comes down to your specific needs. The Open Air PC Case, PC Test Bench PC Case is an affordable, lightweight option that works well for standard ATX and smaller builds, especially if you value simplicity and low cost. Meanwhile, the PC Test Bench,Open Air PC Case,Open Frame Computer delivers robust construction, extensive cooling support, and expandability for workstation or server use. Both are solid choices from JOYJOM, but if you plan to push your hardware with liquid cooling or need to accommodate larger motherboards, the Test Bench is the superior pick. Whichever you choose, you will enjoy the benefits of an open air design that keeps your components cool and on display.

Frequently Asked Questions

Are open frame PC cases safe for everyday use?

Yes, open frame cases are safe as long as you keep them away from liquid spills and avoid touching exposed components. They provide excellent airflow and reduce dust buildup compared to traditional cases, but you should place them in a stable, low-traffic area. Many users in 2026 are adopting open frames for their gaming or workstation setups with no issues.

Do open frame cases come with fans included?

Most open frame cases, including the JOYJOM models we reviewed, do not include fans. You will need to purchase fans separately if you want active cooling. The PC Test Bench supports up to eight 120mm fans, while the Open Air PC Case relies on passive airflow. For more on building a complete system, visit our blog for tips.

Can I use an open frame case for a liquid cooling setup?

Absolutely, especially with the PC Test Bench. It supports a 360mm radiator and multiple 240mm radiators, making it suitable for custom water cooling loops. The open design also simplifies tubing routing. Just ensure your radiator and pump fit within the specified dimensions.

How do I clean an open frame PC case?

Cleaning is straightforward. Use compressed air to blow dust off components and the chassis. Because there are no panels to trap dust, maintenance is easier than with traditional cases. For deeper cleaning, you can use a soft brush or microfiber cloth on the metal surfaces. Avoid using liquids near electronics.

For more product recommendations in related categories, check out our automotive section for beginner-friendly tools.