Tom's Hardware Verdict

Corsair’s Frame 4000D is a thermally effective, reasonably priced, lightweight case that promises future upgrade options.

Pros

+
Reasonable price
+
Strong thermal performance
+
Front and side intake fans supported

Cons

-
Some modular upgrades aren’t available yet

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Features and Specifications

Like recently announced PC cases from Cooler Master and others, the Corsair Frame 4000D promises “modularity” and upgradability. But what’s more important, at least in the short term, is that the Frame 4000D delivers a compelling combination of effective thermal performance in a lightweight package that’s priced reasonably, at only $94.99 USD.

Will Corsair’s 4000D make our list of best PC cases? Let’s take a look at the specifications and features of the case, then we’ll go over the features and wrap up our review with thermal testing.

Product Specifications

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Motherboard support	EATX, ATX, Micro ATX, Mini ITX
Color	Black or White
Type	Mid-Tower
Case dimensions (D x W x H)	490 x 239 x 486 mm / 19.3 x 9.4 x 19.13 inches
2.5-inch drive support	Up to 4x
3.5-inch drive support	Up to 2x
PCIe expansion slots	7 (3 in vertical configuration)
Fan support	Up to 12
Pre-installed fans	None in the version reviewed, but configurations with fans pre-installed are available to purchase for as little as $5 more
CPU cooler clearance	170mm
GPU clearance	430mm
Vertical GPU support	Yes (riser sold separately)
PSU length	Up to 220mm / 8.66 inches
Radiator support	360mm in top, side, or front
MSRP	$94.99 USD for version reviewed $99.99 USD for 4000D RS with fans $109.99 USD for 400D RS ARGB with fans including ARGB lighting
Other features	InfiniRail Fan Mounting System Reverse connect motherboard support

Features of Corsair’s Frame 4000D computer case

▶️ Build quality

When I first picked up the box containing this case (it’s available in black or white), I was surprised by how light it was. Many CPU coolers I have tested weigh more. While the individual pieces of the case will bend if separated from the other components and pressure is applied, they are well-designed and feel premium. When the parts are assembled in the case, it feels sturdy, solid, and capable.

▶️ Side view and customization options, GPU Holder

At first glance, things might seem fairly typical for a case that supports back-connect motherboards like MSI’s Project Zero – cable management bar on the right, front intake next to the bar. But if you look closer, you’ll notice that the motherboard tray is fully removable. And Corsair claims that billet aluminum upgrades will be available in the future.

The bottom piece covering the power supply can be black or translucent, with the latter being useful for lighting.

In the default configuration using front intake fans, there is a cable management bar with a built-in, adjustable GPU holder next to the motherboard (shown above). However, you can switch out the cable management bar with a fan-holding frame to enable the use of side intake fans (shown below).

▶️ Radiator and fan support

This case can be equipped with up to 12 fans, and supports 360mm radiators in the front, top, or side-mounted.

▶️ Dust filters, Bottom View

The case features multiple dust filters, which are fairly easy to remove.

On the bottom of the case, there’s a smaller dust filter for the PSU, and four feet with rubber bottoms.

▶️ Rear side view, storage, and cable management features

The default configuration has both a cable management bar with velcro straps and a routing path with straps to keep things tidy. There are two plates supporting hard drives and SATA SSDs, one behind the motherboard highlighted in the photo above. The other is located between the PSU and the front intake fans, shown below.

Here’s a more detailed look at the storage plate:

▶️ Front view, IO panel

The front of the case shows off a grille with Corsair’s distinct Y-design, behind which is a dust filter.

The included IO panel has (from left to right) a power button, audio jack, Two USB-A ports, and a USB-C port. As part of its modularity claims, Corsair says an upgraded IO panel will be available for purchase in Q2 2025.

▶️ Rear view

The rear view seems pretty standard, but there are a few things to note that stand out from the competition.The PCIe slots are removable because the case includes support for both vertical and horizontal GPU mounting. There’s also a strap handle at the top, but that’s only intended to be used for removing the top tray – don’t try to move the case with the strap, or you might break it!

Thermal tests, test setup, and testing methodology

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CPU	Intel i9-14900K
CPU Cooler	Ocypus Iota A62 WH dual-tower cooler, configured with a single fan
System fans	Ocypus Gamma F12 BK ARGB
Motherboard	ASUS Z790-P Prime Wifi
GPU	MSI RTX 4070 Ti Super Ventus 3X OC

Our thermal tests are presented to give you more information about the product’s performance, but aren’t intended as the sole judgment of the chassis. The style, price, features, and noise levels of a case (if the case includes fans) should also be considered – and we all have different preferences. What I might like in a case, you might not, and that’s OK. My goal with these reviews is to give everyone, no matter their preferences, enough information to decide whether or not a product is right for them.

With today’s review, I’ve updated the configuration and testing methods I use for testing compared to previous reviews. For example, I used to use a single tower air cooler – but I’ve decided to use a dual-tower air cooler with a single fan in case reviews going forward.

The Frame 4000D can be configured in multiple ways: Both front and side-mounted intake fans are supported. For the results shown below, the case has been configured in a side-mounted configuration.

The measurements I’ve benchmarked this case against focus on the efficiency of the case’s thermal transfer. One set of benchmarks will show performance with fans set at full speeds for maximum potential. The other set of benchmarks will show performance with system and CPU fans speeds set to 30% for those who prefer silently running systems.

The version of the Corsair Frame 4000D computer case tested today does not include fans, though versions with fans can be purchased for as little as $5 more in the US. All cases shown in the benchmarks have been tested with Ocypus Gamma F12 BK ARGB fans for consistency.

Current page: Features and Specifications

Next Page Benchmarks and Conclusion

Albert Thomas is a contributor for Tom’s Hardware, primarily covering CPU cooling reviews.

17 Comments Comment from the forums

Heat_Fan89

It looks nice but I went with the NZXT H7 Flow 2024. That is a really nice case and I got it from Amazon for $90.
Reply
jezwinni

A case with good performance, what does that even mean? It is a box.

This obsession with temps is totally stupid, it 2025 and nobody over clocks, temps are irrelevant unless you forget to take the peel off the cooler cold plate.
Reply
philged

I love Corsair, and I'm not someone who generally cares much about the aesthetics of PC products, but for some reason the 3000D/4000D series has always felt unreasonably ugly. Just can't get past how bad that front grill looks.
Reply
truerock

jezwinni said:
A case with good performance, what does that even mean? It is a box.

This obsession with temps is totally stupid, it 2025 and nobody over clocks, temps are irrelevant unless you forget to take the peel off the cooler cold plate.
I've done some over clocking over the last couple of decades. It's an interesting thing to do if you are into that kind of thing - but, not important to 99% of desktop PC owners. It never made that noticeable a difference - to me.

I remember purchasing my first SSD and upgrading my C:\ drive. Now that was very noticeable.

I just built a new desktop PC with CUDIMMs. I've putzed around with overclocking the memory - but, the difference wasn't noticeable - to me.
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extremepcs1

I just built a system in one this weekend. It's really good for the price. I wish I had known that the RGB fans included use standard ARGB headers though vs. Corsair's normal headers. I had to swap them out to connect them to a Commander XL hub. I would have bought the cheaper version without fans.
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onlymostofthetime

I recently purchased this exact case for my newest build. To say that I'm disappointed in Corsair would be an understatement. I had purchased 2 Corsair cases in the past, which I loved.
This one, not so much. For starters, why on earth did they move the power button to the bottom of the case? This makes no sense, unless you want this behemoth of a case to literally sit on your desktop, which would be insane. So, no reason to change in the first place, and now that they have, it has made the product much worse. There are numerous additional foibles, like no back door to access the PSU. You have to manually unscrew that horizontal panel that sits above the PSU. It takes twice as long as if there were some thumb screws on the back. So again, stupid design with no reason for the change.
The Corsair product designers need to stop huffing paint. My score: 1.5/5
Reply
onlymostofthetime

onlymostofthetime said:
I recently purchased this exact case for my newest build. To say that I'm disappointed in Corsair would be an understatement. I had purchased 2 Corsair cases in the past, which I loved.
This one, not so much. For starters, why on earth did they move the power button to the bottom of the case? This makes no sense, unless you want this behemoth of a case to literally sit on your desktop, which would be insane. So, no reason to change in the first place, and now that they have, it has made the product much worse. There are numerous additional foibles, like no back door to access the PSU. You have to manually unscrew that horizontal panel that sits above the PSU. It takes twice as long as if there were some thumb screws on the back. So again, stupid design with no reason for the change.
The Corsair product designers need to stop huffing paint. My score: 1.5/5
Also, no installation manual for any of their products anymore. Most of the time there's a QR code with a link to a "quick start guide" on their website, which is just useless. There are simplistic drawings for children. I would like a proper manual with diagrams showing me where the cables go and what goes where. Get on that, Corsair, and please see my note above about your employees and their concerning paint-huffing habits.
Reply
truerock

I purchased a Corsair PC case recently. The thing I dislike is the box on the bottom for the PSU. The box gets in the way and makes it difficult to set things up inside the case. I have a 12-year-old Corsair PC case without the box, and it is much easier to set things up inside.

I guess the PSU box is there for cosmetic reasons? It seems to serve no purpose.

The other thing I don't like is the ventilation holes for side fans. I have never used and will never use side fans.

Also, I have 3 HDDs in my PC case. The latest PC cases have no slots for HDDs and DVD drives.

I purchased a HDD bracket on Amazon and stuck it on the bottom with magnets. I had thought about using Velcro to stick the HDD bracket to the bottom of the case - but the magnets seem to work better.
Reply
onlymostofthetime

truerock said:
I purchased a Corsair PC case recently. The thing I dislike is the box on the bottom for the PSU. The box gets in the way and makes it difficult to set things up inside the case. I have a 12-year-old Corsair PC case without the box, and it is much easier to set things up inside.

I guess the PSU box is there for cosmetic reasons? It seems to serve no purpose.

The other thing I don't like is the ventilation holes for side fans. I have never used and will never use side fans.

Also, I have 3 HDDs in my PC case. The latest PC cases have no slots for HDDs and DVD drives.

I purchased a HDD bracket on Amazon and stuck it on the bottom with magnets. I had thought about using Velcro to stick the HDD bracket to the bottom of the case - but the magnets seem to work better.
Oh yeah don't get me started on the lack of HD and DVD drive space. I personally play a lot of disc based, older games, so I have to use a USB DVD drive. Although with the wacky way they designed this case, the DVD drive will either be sitting on the floor in front of the power button, or dangling off the back IO port.
I am concerned that the Corsair product designers have a debilitating paint huffing addiction. They should seek help, and then go back to designing good products that people can actually use.
Reply
HardwiredWireless

truerock said:
I purchased a Corsair PC case recently. The thing I dislike is the box on the bottom for the PSU. The box gets in the way and makes it difficult to set things up inside the case. I have a 12-year-old Corsair PC case without the box, and it is much easier to set things up inside.

I guess the PSU box is there for cosmetic reasons? It seems to serve no purpose.

The other thing I don't like is the ventilation holes for side fans. I have never used and will never use side fans.

Also, I have 3 HDDs in my PC case. The latest PC cases have no slots for HDDs and DVD drives.

I purchased a HDD bracket on Amazon and stuck it on the bottom with magnets. I had thought about using Velcro to stick the HDD bracket to the bottom of the case - but the magnets seem to work better.
The Be Quiet Darkbase 901 has slots for HDDs and an optical drive And it is truly modular and can be installed with left or right window configurations. It's also a much higher quality than this one but it costs more as well. Frankly it's worth it.
Reply

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Corsair Frame 4000D Case Review: Lightweight, effective, and right-priced

This case has some modular support, but stands out for being well-priced, lightweight, and delivering excellent thermal performance.