Joybuy Insights

Choosing a PC case: consider size, airflow and upgrade room

A PC case affects far more than the appearance of your build. It influences temperatures, noise levels, ease of installation and future upgrades. Yet many buyers focus mainly on RGB lighting or a glass side panel. This can result in a case that looks great but is not compatible with the graphics card, processor or cooling system.

Common mistakes when buying a PC case

1. Looking only at the size

A mid-tower case is often easier to place under or beside a desk than a full-tower PC case. However, size is not the whole story. Always check the internal space available for the motherboard, graphics card and CPU cooler.

An ATX PC case will generally accommodate standard ATX motherboards. With an E-ATX PC case, you need to check that the wider PCB will not block a cable-routing opening or cover plate. Even cases of the same size can differ considerably in the number of centimetres available.

2. Confusing RGB with good cooling

A PC case with RGB lighting can look appealing, but lighting says nothing about airflow. Look at:

  • The number of included fans.
  • The position of the fan mounts.
  • The openings at the front, side and top.
  • Whether dust filters are included.
  • The space available for cable management.

A case with a closed front panel may allow less air through than a model with a perforated airflow front. Also check whether the included fans connect directly to the motherboard or require a separate controller.

3. Assuming water cooling will fit automatically

If you are looking for a PC case for water cooling, do not just check the radiator length. Also check the combined thickness of the radiator and fans, as well as the clearance around the RAM, motherboard and graphics card. For example, a 360mm radiator may be suitable for top mounting, while tall memory modules could still make installation there difficult.

Key specifications explained

Motherboard and expansion slots

First choose the motherboard form factor you will be using:

  • Mini-ITX: compact, but with limited room for expansion.
  • Micro-ATX: suitable for smaller systems with a few expansion cards.
  • ATX: a popular choice for gaming and workstation builds.
  • E-ATX: wider than ATX and mainly relevant for high-end systems.

Also check the number of expansion slots. Eight slots are common in spacious mid-tower cases, while larger models may offer more. This is important if you are using multiple expansion cards or vertical mounting, provided the case and accessories support it.

Graphics card and CPU cooler

A modern graphics card can be more than 40 cm long. Therefore, compare the maximum GPU length supported by the PC case with the length of your card, including any front fans or radiator.

For the CPU cooler, the maximum height is important. A 170 mm air cooler will not fit in every mid-tower case. With water cooling, check the radiator positions and maximum dimensions separately. Manufacturers sometimes specify different dimensions for each mounting position.

Airflow, dust and maintenance

A PC case with good airflow has sufficient intake and exhaust options. A practical setup often consists of fans at the front or side for intake, with fans at the rear or top for exhaust. The exact arrangement depends on the case.

Dust filters at the front, top and bottom reduce the amount of dust that gets inside, but they do not eliminate the need for maintenance. Remove the filters regularly, clean them according to the product instructions and only put them back once they are completely dry.

Recommended models by user profile

Suitable for: Budget-conscious beginners
Corsair 3500X ARGB Mid-Tower White

Corsair 3500X ARGB Mid-Tower White

Why it suits this profile: This mid-tower provides a well-organised foundation for a gaming PC, with three pre-installed 120mm ARGB fans and support for ATX and E-ATX motherboards.

How this product avoids the pitfall

The specifications list both fan positions and room for a radiator up to 360 mm. However, check the chosen mounting position before ordering your components.

Key benefit & advantages

Supports GPUs up to 410 mm, CPU coolers up to 170 mm, two 2.5-inch and two 3.5-inch positions, plus USB-C.

Suitable for: Buyers looking for premium quality
Corsair 5000D RS Mid-Tower Case - Black

Corsair 5000D RS Mid-Tower Case - Black

Why it suits this profile: This spacious Corsair PC case is designed for powerful ATX, E-ATX and workstation builds where cooling, storage and cable routing all need to work together.

How this product avoids the pitfall

According to the product specifications, four 140mm fans are included. The empty case weighs 15.5 kg, so plan the installation on a stable surface.

Key benefit & advantages

Room for GPUs up to 450 mm, six 2.5-inch and two 3.5-inch positions, dust filters and a modular FRAME system.

Suitable for: Specific applications & intensive users
Corsair 9000D RGB AIRFLOW Full Tower Black

Corsair 9000D RGB AIRFLOW Full Tower Black

Why it suits this profile: This full-tower PC case is designed for large systems with multiple storage drives, extensive ventilation and room for air or custom water cooling.

How this product avoids the pitfall

The airflow design and dust filters are included in the product specifications. Check the exact radiator and GPU dimensions of your components in advance.

Key benefit & advantages

Ten expansion slots, six 2.5-inch and five 3.5-inch positions, two USB-C ports and support for multiple fan sizes.

Suitable for: RGB enthusiasts with a tidy build
Corsair iCUE LINK 5000T LX RGB Mid-Tower White

Corsair iCUE LINK 5000T LX RGB Mid-Tower White

Why it suits this profile: This model combines a glass side panel, addressable RGB lighting and support for ATX and E-ATX builds, with a focus on cable management.

How this product avoids the pitfall

The three included 120mm RGB fans provide a solid starting point. The iCUE LINK hub and power supply require internal connections.

Key benefit & advantages

GPU clearance up to 450 mm, three 2.5-inch and two 3.5-inch positions, multiple radiator mounts and a glass side panel.

Looking for more options?

We have compiled a complete, up-to-date list of products that fully meet these strict selection criteria and the applicable European safety regulations.

Frequently asked questions about PC cases

Which PC case do I need for a gaming PC?

Start by checking the motherboard, graphics card and CPU cooler. A mid-tower is often sufficient for an ATX system. Choose a roomier model if you are using a long GPU, multiple storage drives or a large radiator. Check the maximum dimensions in millimetres; a general label such as “gaming” is not enough.

Is a PC case with tempered glass practical?

A PC case with tempered glass displays the components and suits a build with RGB lighting. However, the glass is heavier and must be handled carefully. Do not place a removed panel on tiles or stone, and hold it by the edges. Also check that you have enough room to remove the panel safely during maintenance.

How much power does a PC case use?

The case itself generally uses very little power. Energy consumption mainly comes from the fans, RGB lighting and the components inside the PC. The number of fans and the way the RGB is controlled can increase consumption slightly. A separate fan or RGB controller is not always included, either, so check the product specifications before ordering.