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Cooler Master MasterBox Q500L Micro-ATX Tower with ATX Motherboard Support, Magnetic Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow

4.4 4.4 out of 5 stars 1,986 ratings

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ATX MB

About this item

  • Minimized dimensions for standard ATX: The Master Box Q500L supports standard ATX motherboards and plus, with a body depth and Height of only 386 x 381 millimeter
  • Fully perforated chassis: The top, front, rear, and bottom panels are fully perforated to offer airflow for various fan configurations
  • Movable I/O panel: Orientation for the chassis is versatile, with the option to move the I/O panel to 6 different locations
  • Vertical and horizontal position: The case can be oriented vertically or horizontally while retaining easy access to the I/O; Rubberized screws also function as feet to supplement different orientations
  • Vertical PSU placement: The PSU is positioned on the front of the chassis to fully utilize internal space; The bracket can be relocated to offer position options depending on preference and form factor

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Cooler Master MasterBox Q500L Micro-ATX Tower with ATX Motherboard Support, Magnetic Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow
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PriceCurrently unavailable.$58.99-12% $78.99
Typical:$89.99
-15% $54.99
List:$64.99
$104.00$158.00
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Easy to assemble
4.3
4.3
4.5
4.5
4.7
4.0
Noise level
4.1
4.4
3.6
4.6
3.0
4.5
Quality of material
3.9
4.5
4.4
4.3
4.0
4.1
Value for money
4.1
4.4
4.5
3.6
4.1
Easy to remove
4.3
4.7
4.0
4.5
Sold By
Amazon.com
Micro Center
Antec Prime
JONSBO
JONSBO
case type
mini tower
mini tower
mid tower
mini tower
mid tower
mid tower
motherboard form factor
ATX
Micro ATX
mATX, mini ITX
Micro ATX
Micro ATX
Micro ATX
material
Acrylic
Tempered Glass, Plastic, Metal
Tempered Glass, Alloy Steel
Alloy Steel
Metal
cooling method
Fan
Air
Water, Air
Air
Air
Air
number of usb ports
2
2
3
4
fan count
5
2
1

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From the manufacturer

Q500L
Q500L

CM logo
Make It Yours.

We're all about the things that make building a PC such a rewarding experience. The sense of achievement. The joy of making and creating something uniquely yours in form and function and, of course, the thrill of bringing your creation to life without melting your components.

Choose Your Style

Q500L

The MasterBox Q500L supports a standard ATX motherboard and PSU in a highly compact layout, made possible by maximizing the usage of internal space. The mounting bracket allows for the repositioning of the PSU depending on form factor. For instance, if a mini ITX motherboard is used instead of an ATX in the MasterBox Q500L, the PSU can be mounted in the conventional position of the bottom, rear to allow for increased front panel ventilation and configuration options.

  • Magnetic dust filters
  • 6-orientation I/O Panel: left and right—top, side and bottom
  • Edge-to-edge transparent acrylic side panel
  • Vertical and horizontal position compatible
  • Vertical PSU placement
  • Clean routing space
  • CPU Cooler: 159mm, GPU 360mm, Radiator Support Tpo: 120mm/240mm, Rear: 120mm
  • Motherboard Support: ATX, Micro-ATX, Mini-ITX

Magnetic Dust Filters

Modular I/O Panel

Versatile Cooling

Components Clearance

Magnetic Dust Filters

The Dust filter's special pattern gives the chassis a distinctive appearance.

Modular I/O Panel

The I/O panel offers versatile placement in six different locations. Whether at the front, top, or bottom on both sides, you have the flexibility to adjust its position.

Versatile Cooling

Stay ahead of the game with versatile mounting options. Take advantage of the opportunity to fit a liquid cooler of up to 240mm, ensuring optimal performance.

Components Clearance

This case supports CPU coolers with a maximum height of 160mm, graphics cards up to 360mm in length, and power supplies with a length of up to 160mm.

Spacious Interior

Vertical PSU Placement

Open Thermal Design

Routing Space

Spacious Interior

Experience a spacious interior that offers abundant room for Micro-ATX or ATX motherboards, allowing for easy installation, efficient cable management, and future expansion possibilities

Vertical PSU Placement

The PSU is strategically placed at the front of the chassis, maximizing internal space. Moreover, the bracket can be easily moved for flexible positioning, catering to different preferences and form factors.

Open Thermal Design

The perforated front, top, and bottom design ensures optimal thermal airflow, promoting excellent heat dissipation throughout the system.

Routing Space

A generous 28mm of space is provided behind the motherboard tray, allowing for efficient cable management and ensuring a clean and organized build.

Q500L ARGB GPU Bracket ML240L Core Hyper 620S SickleFlow 120 V850 SFX Gold
Q500L ARGB GPU Bracket ML240L Core Hyper 620S SickleFlow 120 V850 SFX Gold
Customer Reviews
4.4 out of 5 stars
1,986
4.6 out of 5 stars
895
4.6 out of 5 stars
11,283
4.7 out of 5 stars
7,545
4.8 out of 5 stars
42
4.5 out of 5 stars
1,046
Products ATX Tower Case MasterAccessory Liquid Cooler Air Cooler Fan Power Supply SFX
Compatible
Cooler Clearances 160mm 155mm
Radiator Clearances Up to 240mm 240mm
LEDs Addressable RGB Addressable RGB Addressable RGB Addressable RGB
Support Mini ITX | M-ATX | ATX Full |ATX|M-ATX| Mini-ITX Case AMD AM5|AM4, Intel LGA 1700|1200|115X AMD AM5|AM4, Intel LGA 1700|1200|115X 120mm Case | Air Cooler |AIO 80 PLUS Gold | SFX 12V Ver. 3.42
Fans Up to 5x 120mm | 2x 140mm 120mm
Pre-installed Fans 1x 120mm PWM Dual 120mm ARGB PWM Dual 120mm ARGB PWM SickleFlow 120mm ARGB PWM 92mm
GPU Dimensions *360mm (270mm | 160mm PSU)
Dimensions (LxWxH) 386 x 230 x 381mm 58 x 58 x 177mm 277 x 119.6 x 27.2mm 125 x 137 x 154.9mm 120 x 120 x 25mm 100 x 125 x 63.5mm

Product information

Technical Details

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Additional Information

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

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Cooler Master MasterBox Q500L Micro-ATX Tower with ATX Motherboard Support, Magnetic Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow


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Product guides and documents

Product Description

The Master Box Q500L supports a standard ATX motherboard and PSU in a highly compact layout. With the same exterior dimensions as the Master Box Q300L, support for a standard ATX motherboard was made possible by maximizing the usage of internal space. Although the PSU is mounted by default at the top/front of the chassis, the mounting bracket allows for the repositioning of the PSU depending on preference and form factor. For instance, if a mini ITX or micro ATX motherboard is used instead of an ATX in the Master Box Q500L, the PSU can be mounted in the conventional position of the bottom, rear to allow for increased front panel ventilation and configuration options.

Customer reviews

4.4 out of 5 stars
4.4 out of 5
1,986 global ratings

Customers say

Customers like the appearance, size and value of the computer chassis. For example, they mention it looks good, it takes up less space and it's a great concept for a compact ATX case. That said, some disagree on quality, ease of use, airflow, cooling, and fit.

AI-generated from the text of customer reviews

87 customers mention72 positive15 negative

Customers like the appearance of the computer chassis. They mention that it looks good, has a thoughtful design, and is very nice. Some appreciate the symmetrical looks and the patterned dust filters. Overall, most are happy with the appearance and functionality of the product.

"...It looks awesome and exceeded my expectations. My next step is definitely a custom loop water cooling setup for both the GPU and CPU...." Read more

"...Otherwise, the side panel is clear plastic but still looks good and is lighter than glass...." Read more

"...It's sturdy, semi-modular, lightweight, and the patterned dust filters look great...." Read more

"...I found that the pattern on the filters give the the case a cool unique look that I have got nothing but positive comments on!..." Read more

72 customers mention64 positive8 negative

Customers like the size of the computer chassis. They say it's a great concept for a compact ATX case that takes up way less space. The case is open yet compact, and it fits a full size motherboard. The space is well-used and well designed, so you can fit a lot into a smaller space. Customers also mention that the case is versatile and has plenty of room for cable management.

"...Plenty of room to fit full size components, and plenty of room on the back of the motherboard tray for cable management with plenty of hold-down..." Read more

"...There's plenty of room for cable management and I've had no issues fitting everything inside...." Read more

"...The looks are understated and minimalist, which I like.Space is well-used and well designed, so you can fit a lot into a smaller space...." Read more

"...this case is pretty compact. putting my atx board inside of here straight in was touching the walls...." Read more

52 customers mention44 positive8 negative

Customers like the value of the computer chassis. They say it is a great case for the money, worth the buy, and easy to use. Some mention that it fits the budget with some style.

"I was pleasantly surprised by how well made this case is given the price point...." Read more

"...Overall, fit, finish, build quality and features make this a good buy at this price point." Read more

"...A lot of shortcuts were taken with this case. However, it is a very budget case, so you get what you pay for, and in that respect, you get a little..." Read more

"...Overall, i give this case a 4.5/5. Its exceptional bang for the buck and well thought out design by cooler master as usual...." Read more

92 customers mention58 positive34 negative

Customers are mixed about the quality of the computer chassis. Some mention that the build looks decent, the material is sturdy, and well put together, while others say that the clear panel was pretty flimsy and the hardware stripped pretty easily.

"...This case is fantastic. I decided to downsize from a Cooler Master Masterbox Pro 5 RGB (as seen in the pictures) and this case is perfect...." Read more

"...cable management routing holes are all well placed and made for a very clean build. I will start with some of the cons:..." Read more

"...The front panel is a little flimsy when plugging in a USB cable and it also would've been nice to have the option of glass...." Read more

"...Space is well-used and well designed, so you can fit a lot into a smaller space.Shorter tower.Buttons and ports on the side...." Read more

50 customers mention23 positive27 negative

Customers are mixed about the airflow in the computer chassis. Some mention that it has good airflow and dust protection, while others say that it doesn't have good enough ventilation. The case has plenty of ventilation on 4 sides, and the extra fans make a noticeable noise, but it puts out a lot of air, keeping things cool. However, some customers say that the air flow isn't good enough and the dust filters don't allow for good air flow.

"...stated before, the biggest draw back of this build is the power supply blocking air flow...." Read more

"...Air flow is not an issue at all...." Read more

"...everything buttoned up and the magnetic screens on, the airflow is terrible inside the case...." Read more

"...full-size ATX motherboard into the system and there is still plenty of breathability...." Read more

49 customers mention32 positive17 negative

Customers are mixed about the ease of use of the computer chassis. Some mention that the build quality and how easy it was to get everything together, the case was pretty easy to work with, and the wiring is super easy and simple. However, others say that the instructions are terrible, hard to build in, and a nightmare to work.

"...I would recommend this case for its modular features, easy mounting for fans, good airflow and dust protection, ease of access to build in, and it..." Read more

"...The instructions are basically useless, but you can pretty much figure everything out...." Read more

"...This fits perfectly with my 4060. The wiring is super easy and simple too...." Read more

"...I do casual gaming and this is my first PC build. The case was pretty easy to work with and cable management was actually no problem..." Read more

40 customers mention17 positive23 negative

Customers are mixed about the cooling of the computer chassis. Some mention that it can be sufficient with a fan everywhere, while others say that it gets as warm as a toaster. They also say that the CPU runs a bit cooler and the VRMs are nice and chilly. However, some customers say that is very small so heat can be an issue, and the case just will not stay reasonably cool.

"...I've had a significant increase in temps and the case is warm to touch when my PC's under stress...." Read more

"...In my old case, it would hit 80c all the time. My CPU runs a bit cooler now too, and my VRMs are nice and chilly barely reaching 60c...." Read more

"...i7 CPU, not overclocked, and during Lightroom exports, the core temps were hitting 100. Moving the dust filter to the top helped a bit...." Read more

"...The system runs cool, quiet and smooth, no thermal throttling. Front and top are basically all open surface covered by magnetic air filters...." Read more

36 customers mention17 positive19 negative

Customers are mixed about the fit of the computer chassis. Some mention that everything fits nice, it fits a full size ATX board, and can go sli with it. However, others say that it doesn't fit very well, it's small for an ATX case, and is far too cramped inside.

"...It will fit a full size ATX MB...." Read more

"...flaw with them is that it doesn't offset the holes at all so you cannot get a snug fit on the screws unless you use some sort of washer to add space...." Read more

"...This fits perfectly with my 4060. The wiring is super easy and simple too...." Read more

"...The power supply is a tight fit at the front of the case and exhausts upward...." Read more

Stock config is warm inside, but easily fixed!
5 Stars
Stock config is warm inside, but easily fixed!
The case is very strong and well built. No sharp corners or edges anywhere and everything is very well laid out for such a tiny case. I went from a Rosewell Full Tower (nearly 36" x 36"x 10"), the biggest case I could find at the time, for a Threadripper build nearly 5 years ago. This Q500L case literally fits inside the old case.The only two real problems with this case the power supply (with a full ATX board) mounts in the upper front of case and blocks air flow to the CPU cooler. Only way to solve this would be an external power supply or a fan above the power supply. Also, the mesh holes for the case could have been bigger to allow more air flow, at least where you would mount fans.I installed a AMD 1950x Threadripper, ASROCK x399 full ATX MoBo inside the Q500L case, with a BeQuit Dark Rock Pro TR4 cooler, Cooler Master MWE Gold 850 V2 and Sapphire Rx 6700xt (dual fan) Video Card. Everything FITS!!! (accept the front cover does NOT fit with Dark Rock Pro TR4 cooler).I like to do radical case mods, so this one is a work in progress... JayzTwoCents style, cutting holes and and modding. So far, I've only done custom snake skin paint job.Front cover will be replaced with something meshed for improved air flow. I also have ordered some custom video card power supply cables, the current ones work but look like crap.This is a work in progress... It runs very well with one rear exhaust fan, one front intake fan, one exhaust fan under GPU (blowing down or out side cover) and one exhaust fan above cpu/power supply. Cutting out holes for all fans would also improve air flow.As I stated before, the biggest draw back of this build is the power supply blocking air flow. An cpu AIO could be a possibility, but I really wanted to go air.This would be a great case for small form factor build, something with an APU or someone like me that likes to MOD and do something different.
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Top reviews from the United States

Reviewed in the United States on September 19, 2019
Style: ATX MBVerified Purchase
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5.0 out of 5 stars EXCELLENT CASE NO QUESTIONS ABOUT IT
Reviewed in the United States on September 19, 2019
I ordered this case the day it got released, before seeing anyone review it, or without thinking twice and all I have to say is...

This case is fantastic. I decided to downsize from a Cooler Master Masterbox Pro 5 RGB (as seen in the pictures) and this case is perfect. My temperatures for my GPU (Vega 56) and my CPU (Ryzen 7 1700x OC'd @4.1ghz) are running cooler than ever. My GPU rarely gets about 55c, even during extended gaming sessions. In my old case, it would hit 80c all the time. My CPU runs a bit cooler now too, and my VRMs are nice and chilly barely reaching 60c. That's a far cry from the 95c temps on the VRMs I was getting in my old case. I have ZERO issues that others seem to complain about.

People are calling it the "masteroven". Not even close. What's so hard about adding fans?? The Deep Cool fans I have (3 120mm RGB and 2- 140mm RGB) allow it to run very cool. Air flow is not an issue at all. I have the very bottom 2 fans and the bottom front on pull with the fan on the 120mm rad and the 2- 140mm fans on top exhausting, taking advantage of the nature of heat rising and also getting excellent airflow through my blower style GPU and also across the VRMs of the motherboard. The PSUs fan exhausts up as well, following the path of the airflow.

Building inside this thing was a dream, having built 8 PCs in the past year and a half, I have to say its one of my favorite cases to build in. Plenty of room to fit full size components, and plenty of room on the back of the motherboard tray for cable management with plenty of hold-down points for zip-tying.
It looks awesome and exceeded my expectations. My next step is definitely a custom loop water cooling setup for both the GPU and CPU. I'll update this review when that happens.
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6 people found this helpful
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Reviewed in the United States on December 2, 2022
Style: ATX MBVerified Purchase
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5.0 out of 5 stars It's tight, but it works
Reviewed in the United States on December 2, 2022
I got this case to replace a massive full tower case because I wanted to reduce the footprint where I keep it under my desk. This case is 1/2 the height and 20 pounds less than what I had (empty). It will fit a full size ATX MB. The power supply mounting is a little tricky, because the entire unit is fully enclosed inside the case (including the PS power switch). This comes with an extension plug to reach the plug from the inside of the case (now mounted in front) to reach into the back of the case for the external power cord. The only issue with this is the switch for the Power Supply is now inaccessible, whereas if I want to completely shut off power, I have to unplug it. CD ROMS are a thing of the past and there is no mounting options in the front of the case (doesn't bother me because I don't think I used a CD in over 3 years). There is 4 mounting pads for SSD, or 3 mounting pads for mechanical hard drives. Otherwise, the side panel is clear plastic but still looks good and is lighter than glass. The USB's and power button are on the side of the case, so if you have a desk with an PC enclosure, this could be a problem. The sound is average as I can still hear the fans when this is turned on, but it is quieter than my other case that had an overkill of 6 fans. Overall, I don't hate this case, but it fills my needs.
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4 people found this helpful
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Reviewed in the United States on March 24, 2021
Style: ATX MBVerified Purchase

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Brenda
5.0 out of 5 stars Excelente calidad-precio
Reviewed in Mexico on December 17, 2020
Style: ATX MBVerified Purchase
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Brenda
5.0 out of 5 stars Excelente calidad-precio
Reviewed in Mexico on December 17, 2020
Si bien no es de los gabinetes más caros es bueno para el precio que ofrece.
Recomendaría más la versión micro ATX ya que para eso fue planificado y después hicieron la modificación para tamaño ATX completo.

Tengo un instalado en ese gabinete una T. Madre ASUS ROG STRIX B550-F, cupo a la perfección pero hay que destacar por ejemplo que de tarjeta de video cupo perfectamente mi RTX 2060 ASUS por sus dimenciones que son compactas, si estás planeando una tarjeta de video más grande vas a batallar mucho al momento de armar las cosas por el espacio reducido y el flujo de aire no sería el mismo.

Al momento de conectar cables si fue un poco tedioso porque no hay espacio extra para cables que no se ocupan y tendrías que tener un buen manejo de estos para que no se amontone todo y pueda cerrar bien.

El resultado fue bueno sobre todas las cosas, si en la habitación entra mucho polvo tendrás que tener cuidado con eso, aunque tenga los filtros es muy propenso a que entre mucho polvo en el gabinete entonces hay que hacer limpiesa regular.

En cuanto a tamaño si estoy muy feliz con eso, no quería una torre completa y esto cumple bastante bien, sobretodo para espacios reducidos.
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micah smith
5.0 out of 5 stars Well thought through design, good quality, looks way better in person, super easy to work with
Reviewed in Canada on July 11, 2020
Style: ATX MBVerified Purchase
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micah smith
5.0 out of 5 stars Well thought through design, good quality, looks way better in person, super easy to work with
Reviewed in Canada on July 11, 2020
First pc build. Despite unconventional psu placement, was still a super easy build. Fit full atx board and still had room for 6 120mm case fans as well (including the pre-installed exhaust). The case is quite wide as well for easy cable management and the hard drive mounts are easily accessible as well. The quality of this case is very good, and the design is well thought through, especially at this price range. If you're not sure whether to buy this case, I can assure you won't be disappointed. It also looks a lot better in person. It's a lot darker and the soft gray geometric lines compliment it well.
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Alex
5.0 out of 5 stars Caja elegante, buena ventilación y compacta.
Reviewed in Spain on October 19, 2020
Style: ATX MBVerified Purchase
Keith Devenish
5.0 out of 5 stars VERY COMPACT!!!
Reviewed in Australia on August 11, 2021
Style: ATX MBVerified Purchase
Pablo Alvarado
5.0 out of 5 stars Buena relacion Precio-beneficio. Minimalista, pero trabajoso para ensamblar
Reviewed in Mexico on February 11, 2022
Style: ATX MBVerified Purchase