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Best cases for the RTX 4090

There is no question that Nvidia's new GPU line is a hefty design, but these products among the best cases for the RTX 4090 will keep it safe and secure
Last Updated on April 19, 2023
Best cases for RTX 4090

With the arrival of the new RTX 4090, small cases are no longer a viable option, since this new GPU is quite chonky, yet all the more powerful for it. It may almost feel like you’re connecting the motherboard to the GPU, as opposed to the other way around.

Changing the GPU also means changing the PSU, and a good power unit for the RTX 4090 will probably be just as big. So eventually, you’ll probably run out of space on your current PC case to fit all these new components. In this post, we’ll list out all the best cases for the RTX 4090 to house that beefy new hardware. 

Products at a Glance

How we picked the best cases for RTX 4090

We started out by checking a long list of cases and closed in on the ones that will be able to house this new GPU, leaving just enough space for the air to circulate without damaging all of the components. We also made sure to choose cases that offered the best bang for your buck without compromising performance and design in the overall build.

Features and considerations

The first thing we need to consider is the case’s size. Your new PC case will need to fit a massive graphics card and a comparably large PSU. An ATX standard frame form factor would be ideal. After considering the size, there are a few other things to consider when choosing among the best cases for the RTX 4090. Below is a short list of features to consider:

  • Performance
  • Design (temper glass side or not)
  • Price
  • Configuration.
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  • Great Aesthetics
  • More than enough room for cooling systems
  • Swappable drive bays
  • Not enough room in the back chamber
  • Magnetic strips in the dust filters

Lian Li is a classic in the PC cases design realm. The Lian Li O11 Dynamic XL is an upgraded version of the firm’s old Dynamic model, one of its best sellers. This case has an aluminum base with front and side tempered glass panels. It also comes in white, silver, and a special Razer edition.

This is one big case, as its name implies, so it can easily fit any ATX, Mini ITX, or micro ATX motherboard with no problems thanks to its built-in mobo support. The dimensions for this case are 23.75 x 15 x 23.3 inches. It has a modular design, making it rather flexible to almost any configuration one may have in mind, so let your imagination fly. 

Heat dissipation is an important feature in this case. It has support for an additional 120mm fan at the rear and enough room for a thick radiator at the bottom even when mounting dual GPUs or vertical. Furthermore, it has a GPU length of 446mm, which makes it more than capable to store the RTX 4090.

  • Maximum PSU Length: 220 mm
  • Powerful fans
  • Great stock thermal performance
  • The fan can be too noisy

The Asus ROG Strix Helios is a beautifully designed case made with high-end materials like aluminum, alloy steel, and tempered glass. If you’re looking for something that takes center stage amongst everything in your room, this case will suit you perfectly. ROG makes the case compatible with the AURA lighting environment so you can control and personalize the RGB lights that are built into it.

The dimension of this Mid-Tower case is 250 x 565 x 591 (WxDxH). It has support for EATX motherboards and space for nine storage drives. The Helios also has a 450mm GPU clearance, which is more than enough space for that brand-new RTX 4090. The cooling system is great, utilizing four 140mm fans and up to seven optional fan-mounting points, with support for radiators up to 420mm in length and 90mm thick. 

  • Amazing cable management
  • Extensive water cooling supports
  • It comes with premium fans
  • More than enough space
  • Outdated look

We know you are already making quite an investment in this new GPU, which entails also buying the best PSU for the RTX 4090, so you might want to save a few bucks where possible. Although it’s not recommended to buy a cheap case by any means, there are still a plethora of sound budget options on the market, like this case from Phanteks. 

Phanteks is a fairly new company in the world of PC chassis, but it has earned its place in the market. The Enthoo Pro is a full-tower with support for ATX, EATX, mATX, and SSI EEB motherboards. The tower dimensions are 235 x 535 x 550mm. The Phanteks Enthoo Pro includes a 200mm fan in the front and a 1 x 140mm fan in the rear that ensures quality heat dissipation from the outset.

It’s a good case for first-time builders. The case has a pre-installed cable management tie system to make the headache of a rat’s nest escape your worries. Its looks aren’t the most modern, but if you prefer a somewhat subtle chassis design and don’t have all too much to spend on it, this will be a great option for you.

  • Greatly customizable layout
  • Amazing fan space
  • Has a GPU rise cable
  • Last-Gen PCIe Version

The Cooler Master Cosmos C700M is one of the best-looking towers available. Cooler Master based their design on the previous 700P, which was an absolute success on the market, one the company only made even better. This case has a highly versatile design. Each part of the frame enables a variety of changes for you to personalize your layout at your convenience.

The Cosmos C700M is a full-tower, so it’s compatible with Mini-ITX, Micro-ATX, ATX, and E-ATX motherboards frame forms. Its dimensions are 650 x 306 x 651mm, and it has radiator supports of 120mm; 140mm; 240mm; 280mm; 360mm; 420mm. The Cosmos has aluminum panels and handles with curved tempered glass that lets you see the full layout of your components. It has four bay drives, a CPU clearance of 198mm, and a 490mm GPU clearance. That means great space for the beefy RTX 4090, plus a great capacity to let you mount everything the way you want. 

That’s the list of absolute best cases for the RTX 4090, rounding out some hefty chassis for that new big-boy GPU. We tried to keep this list viable in performance and budget, with appearances also serving as a major focal point. You don’t want all of those PC parts looking stale in a mundane case, after all.

What size case is needed for RTX 4090?

This generally depends on the specific RTX 4090 you have, as most third party options aren’t the same size. Always check the length of your card before making a final decision.

Are the 4080 and 4090 the same size?

The 4080 and 4090 both share the same dimensions, but may differ dramatically per third party options. Not all cards are the exact same, so make sure you check the dimensions of your GPU before picking a case.

Our Verdict

Finding a good middle ground between full-size and mid-size towers was one of our biggest concerns. We know not everybody has the space or likes the full-tower size, but the best option was the Lian Li O11 Dynamic XL. It offers a sleek look, a great heat dissipation system, and more than enough space for that chonky RTX 4090. The price isn’t so made, either, when compared with others on the market, and you can customize it to your liking, which is key.