Cooler Master MasterBox MB511 - ATX PC Case with Front Mesh Panel, Racing Intakes, Transparent Side Panel, Flexible Air Flow Configurations - Red Accent
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Purchase options and add-ons
Brand | Cooler Master |
Motherboard compatibility | ATX |
Case type | Mid Tower |
Recommended uses for product | Gaming |
Colour | Red |
Material | Alloy Steel Plastic |
Power supply mounting type | Bottom Mount |
Cooling method | Fan |
Model name | MasterBox MB511 |
Fan size | 120 Millimetres |
About this item
- FINE MESH FRONT PANEL - Designed for demanding gaming systems, the front and top panel employ a fine mesh to ensure high-volume airflow while filtering dust.
- MULTIPLE FAN AND RADIATOR CONFIGURATIONS - Front: 3 x 120mm, 2 x 140mm* fans, and up to a 360mm radiator with a maximum thickness of 50mm excl. fans. Top: 2 x 120/140mm fans and up to a 240mm radiator. Rear: 1 x 120mm fan and radiator.
- EDGE-TO-EDGE TRANSPARENT SIDE PANEL - Showcase your build through the lightweight acrylic side panel.
- EXPANDING THE POSSIBILITIES - Spacious interior layout accommodates standard form factor ATX motherboards for gaming needs (Mini-ITX, Micro-ATX, Standard ATX).
- MAIN COMPONENTS CLEARANCE - Supports CPU coolers (air/liquid) up to a height of 165mm, graphic cards (GFX) up to a length of 410mm and power supplies (PSU) up to a length of 180mm.
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Cooler Master

94% positive ratings from 1K+ customers

5K+ recent orders from this brand
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Building a PC is a highly personalized journey. Our components represent so many different personalities because PC enthusiasts don’t fit into just one mold. It doesn’t matter if you’re a student on a tight budget, a graphic designer that’s brand new to building, or a veteran modder of high-end gaming PCs; we offer components to inspire creative freedom in everyone.
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From the manufacturer


Building a PC is a highly personalized journey. We know that components are carefully chosen based on performance, functionality, and aesthetic preference. Your personality is embedded in each of those choices, transcending from hardware to an immersive, custom-built experience. From custom PCs to all-out gaming rooms, we encourage every decision to reflect who you are.
Cooler Master MasterBox MB511 - ATX PC Case with Front Mesh Panel
- FINE MESH FRONT PANEL - Designed for demanding gaming systems, the front and top panel employ a fine mesh to ensure high-volume airflow while filtering dust.
- MULTIPLE FAN AND RADIATOR CONFIGURATIONS - Front: 3 x 120mm, 2 x 140mm* fans, and a 360mm radiator. Top: 2 x 120/140mm fans and a 240mm radiator. Rear: 1 x 120mm fan and radiator.
- EDGE-TO-EDGE TRANSPARENT SIDE PANEL - Showcase your build through the light-weight acrylic side panel.
- EXPANDING THE POSSIBILITIES - Spacious interior layout accommodates standard form factor ATX motherboards for gaming needs (Mini-ITX, Micro-ATX, Standard ATX).
- MAIN COMPONENTS CLEARANCE - Supports CPU coolers (air/liquid) up to a height of 165mm, graphic cards (GFX) up to a length of 410mm and power supplies (PSU) up to a length of 180mm.

CARBON TEXTURE
Racing and motorsports inspired the carbon texture design. Offers efficient airflow for
demanding systems from the mesh front panel (includes 3 x dust filters).
Available in 4 colours:
- Red
- White
- Black
- Blue
THERMAL PERFORMANCE
Optimized airflow due to the large intakes on each side of front panel and perforated top panel of the case.
- Front: 3 x 120mm or 2 x 140mm* fans, or a 360mm radiator (max. 50mm deep excluding fans)
- Top: 2 x 120/140mm fans or a 120mm/240mm radiator
- Rear: 1 x 120mm fan or radiator
EDGE-TO-EDGE TRANSPARENT SIDE PANEL
Showcase your build through the transparent* side panel.
*Acrylic plastic
EXPANDING THE POSSIBILITIES
The spacious interior fits all standard motherboards (ATX, microATX, Mini-ITX) for your gaming needs.
The MB511 case supports CPU Coolers up to a height of 165 mm, Graphic cards up to a length of 410 mm and Power Supplies up to a length of 180 mm.
I/O PANEL | 2 x USB 3.0, Audio In & Out (supports HD audio) |
EXPANSION SLOTS | 7 |
2.5" / 3.5" DRIVE BAYS (COMBO) | 2 |
2.5" DRIVE BAYS | 5 (Max. 6) |
POWER SUPPLY SUPPORT | Bottom mount, ATX |
PRE-INSTALLED FANS - REAR | 1 x 120mm Fan (Black) |
CABLE ROUTING SPACE | 19 mm |
MANUFACTURER COVERAGE | 2 Years |
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MasterBox MB511
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MasterBox K500L
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MasterBox TD500 Mesh
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Customer Reviews |
4.6 out of 5 stars 6,070
|
4.4 out of 5 stars 518
|
4.7 out of 5 stars 5,457
|
Price | £91.13£91.13 | — no data | — no data |
Size | Mid Tower | Mid Tower | Mid Tower |
Dimensions | 523 x 276 x 568 mm | 491 x 210 x 455 mm | 493 x 217 x 469 mm |
Motherboard Support | ATX, Micro ATX, Mini ITX | ATX, Micro ATX, Mini ITX | Mini ITX, Micro ATX, ATX, SSI CEB, E-ATX*, (*support for up to 12" x 10.7", will limit cable management features) |
Side Panel | Transparent Acrylic | Transparent Acrylic | Crystalline Tempered Glass |
Case Lighting | no data | 2 x Red LED Fans | 3 x ARGB Fans |
Max. Radiator Support | FRONT: 360mm | TOP: 240mm | REAR: 120mm | FRONT: 280mm | REAR: 120mm | FRONT: 360mm | TOP: 360mm | REAR: 120mm |
Compare with similar items
This item ![]() Cooler Master MasterBox MB511 - ATX PC Case with Front Mesh Panel, Racing Intakes, Transparent Side Panel, Flexible Air Flow Configurations - Red Accent | Recommendations | ||||
Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | |
Price | £91.13£91.13 | -6% £65.99£65.99 Was: £69.99 | £57.40£57.40 | -5% £58.21£58.21 Was: £61.25 | £89.99£89.99 |
Delivery | Get it as soon as Friday, May 30 | Get it as soon as Friday, May 30 | Get it as soon as Friday, May 30 | Get it as soon as Thursday, May 29 | Get it as soon as Friday, May 30 |
Customer Ratings | |||||
Sold by | Amazon | FOIFKIN | Amazon Resale | CCL Computers | Amazon |
case type | mid tower | tower | mid tower | mid tower | mid tower |
motherboard form factor | ATX | ATX, M-ATX | Micro ATX | ATX | ATX |
material | Alloy Steel Plastic | Tempered Glass | Tempered Glass | Plastic | Metal |
cooling method | Fan | Air | Air | Air | Air |
power supply mount | Bottom Mount | Bottom Mount | Bottom Mount | Rear Mount | Bottom Mount |
number of USB ports | 2 | — | 2 | 2 | 2 |
fan count | 3 | — | 6 | 2 | 2 |
fan size | 120 millimeters | — | 120 millimeters | 120 millimeters | 120 millimeters |
hard disk form factor | 3.5 inches | — | 2.5 inches | 3.5 inches | 3.5 inches |
expansion slots | 7 | — | 7 | 7 | 7 |
USB 2.0 ports | 2 | — | 2 | 1 | 2 |
What's in the box?
Product details
- Is discontinued by manufacturer : No
- Language : English, English, English, English, English
- Product Dimensions : 49.6 x 21.7 x 46.8 cm; 6.45 kg
- Date First Available : 7 May 2018
- Manufacturer : Cooler Master Europe B.V.
- ASIN : B07CYBQWYQ
- Item model number : MCB-B511D-KANN-S00
- Country of origin : China
- Guaranteed software updates until : unknown
- Best Sellers Rank: 88,214 in Computers & Accessories (See Top 100 in Computers & Accessories)
- 727 in Computer Cases
- Customer reviews:
Customer reviews
Customer Reviews, including Product Star Ratings, help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers praise the PC case's glass panel, spacious interior that accommodates 30 series graphics cards and multiple 140mm fans, and appreciate its value for money. The case features good cable management options, easy assembly, and effective cooling, with one customer noting their CPU and GPU run cooler without dust buildup. While some customers report solid build quality, others find it poorly constructed.
AI-generated from the text of customer reviews
Customers like the appearance of the PC case, particularly praising its glass panel and overall design, with one customer noting that it looks good even without RGB lighting.
"...You can switch colours on it, however it is done by a switch, which I personally placed inside the case, but I am sure you can move it to the..." Read more
"...do not have super detailed functionality, but they have several different color switch modes and settings to choose from, making them the perfect '..." Read more
"...No sharp edges, the rivets are painted black, it's a tempered glass side not acrylic...." Read more
"Once fully assembled with RGB lighting, the case looks great. It's very light but sturdy at the same time. Downside is it's quite compact...." Read more
Customers appreciate the room size of the PC case, with sufficient space for cable management and compatibility with 30 series graphics cards. One customer mentions it accommodates larger PSUs well, while another notes it can fit multiple 140mm fans.
"...It has plenty of room inside, huge case, my 1070 GPU seems like a small card inside...." Read more
"...-Excellent looks, not a solid box shape -Big enough to house ATX but still very compact in its size -Easy to work in Cons:..." Read more
"...Plenty of room to work inside. Cable management is easy to get right...." Read more
"...Good cable management with plenty of openings to tuck everything neatly away * Included fans are quiet * Very good value for money *..." Read more
Customers find the PC case offers good value for money.
"...In conclusion this is that this case is an incredible deal for all the features it provides...." Read more
"The MB520 RGB is a well designed case at a great price point...." Read more
"...Included fans are quiet * Very good value for money * Thumb screws for PSU mount CONS: * It's compact *..." Read more
"...With its sturdy build and customizable RGB lighting, it provides good value for money and is an ideal choice for showcasing your components while..." Read more
Customers appreciate the airflow of the PC case, with one customer noting that the three front fans suck in air, while another mentions the rear fan provides positive pressure.
"...The pre-installed fans work great, you have 3 in the front sucking in air and 1 in the back pushing air out...." Read more
"...with mesh dust filters to allow good intake of air, and 1 rear fan ensures air flow over all the components, and also at stock you have positive air..." Read more
"...It offers excellent airflow, cable management, and compatibility for various hardware configurations...." Read more
"A fantastic case for the price. Excellent airflow, well labelled screw and mounting ports, plenty room for components...." Read more
Customers find the PC case easy to assemble, with one mentioning that cable management is straightforward and another noting that the motherboard mounts perfectly.
"...When I put my PC together, it was fairly easy to use the room inside the case, easy to connect all the cables for the fans and LED...." Read more
"...-Big enough to house ATX but still very compact in its size -Easy to work in Cons: -No front panel dust filter..." Read more
"...Plenty of room to work inside. Cable management is easy to get right...." Read more
"...Big enough to fit Monster Zotac RTX 3070 Extreme. All assemble parts works perfect with mobo, psu and gpu...." Read more
Customers appreciate the cooling options of the PC case, with one customer noting that their CPU and GPU temperatures are lower, and another mentioning that their PC runs cool without accumulating dust.
"...Keeping my case cool, my current set up with a i5 9600k and gtx 1070, the case is around 30-35C inside average under use..." Read more
"...and is an ideal choice for showcasing your components while keeping them cool." Read more
"...Fans are efficient and good quality, and the LEDs are excellent. No issues whatsoever, and looks visually impressive." Read more
"...Airflow is very good - excellent temps with the right fans and placement. Easy cable management." Read more
Customers appreciate the case's cable management features, with plenty of options available.
"...Good cable management with plenty of openings to tuck everything neatly away * Included fans are quiet * Very good value for money *..." Read more
"...It offers excellent airflow, cable management, and compatibility for various hardware configurations...." Read more
"...Easy cable management." Read more
"...plastic and metal Material, no lighting but that’s fine, promotes great cable management as it makes it easy...." Read more
Customers have mixed opinions about the build quality of the PC case, with some praising its solid and rigid construction, while others find it poorly built.
"...Overall, I am happy with the design and quality and would recommend to those wanting to spend less than £100 on a case." Read more
"...Pros: -Great and rigid construction. No cheap non-reusable PCIE slots here. -Excellent looks, not a solid box shape..." Read more
"...It's very light but sturdy at the same time. Downside is it's quite compact...." Read more
"...rubber flaps, the lack of front USB type C and the "not quite as sturdy" feeling plastic of the front of the case - but I don't think these warrant..." Read more
Reviews with images

Very satisfied with this product.
Top reviews from United Kingdom
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- Reviewed in the United Kingdom on 22 February 2019Size Name: MB520Style Name: RGBVerified PurchaseWhen I received the case it ws well packaged and looked amazing out of the box. When I put my PC together, it was fairly easy to use the room inside the case, easy to connect all the cables for the fans and LED. It has plenty of room inside, huge case, my 1070 GPU seems like a small card inside. I do love the LED addition, that is why I paid more than the regular case. You can switch colours on it, however it is done by a switch, which I personally placed inside the case, but I am sure you can move it to the outside as well. The switch is roughly the size of a Leatherman (when closed) or smaller a little. I think I would have preferred if CoolerMaster integrated this LED switch into the case on the front, so you can just press the button whenever you want. This is me personally saying it, I am not a fan of a separate switch that you can place wherever you like.
The pre-installed fans work great, you have 3 in the front sucking in air and 1 in the back pushing air out. Keeping my case cool, my current set up with a i5 9600k and gtx 1070, the case is around 30-35C inside average under use
The filters are amazing, well thought, maybe not the best, highest quality, but for this money, I am well happy with them. The top is magnetic, clever thought. The bottom is a tad fiddly to put back on, however not difficult. Definitely makes cleaning easier. The front looks fantastic, and you have an additional 2 USB3 ports there.
The side window is not tampered glass but acrylic, so it can get damaged easily, but only if you are a clumsy monkey. It looks great, darkened as well so the inside bit is still visible, however creates an expensive look.
Overall, I am happy with the design and quality and would recommend to those wanting to spend less than £100 on a case.
- Reviewed in the United Kingdom on 5 May 2018Size Name: MB500Style Name: RGBVerified PurchaseThis has got to be one of the best 'bang for the buck' cases out there.
For this price you get a tinted tempered glass side panel, 3 RGB fans and enough space for an ATX build.
The RGB fans do not have super detailed functionality, but they have several different color switch modes and settings to choose from, making them the perfect 'babies first RGB set' to play around with. (another pro to the RGB is they dont need any software, just wire them to the reset switch and select the mode you like)
Pros:
-Great and rigid construction. No cheap non-reusable PCIE slots here.
-Excellent looks, not a solid box shape
-Big enough to house ATX but still very compact in its size
-Easy to work in
Cons:
-No front panel dust filter
-Has a top dust filter but its basically wasted because no fans use it by default (I configured my case to have fans there)
-Thermals can get a bit on the hot side when under load
-Default fans can get loud when under load
-For looks, the indent where the tempered glass side panel is not big enough, so it sticks out ever so slightly outside of the case (biggest con from a visual perspective)
-Reset switch cannot be clicked with your fingers. You have to use some tiny tool like a quetip or a toothpick to click it.
-Front fans need to be positioned on the mesh, otherwise the fans are choked.
In conclusion this is that this case is an incredible deal for all the features it provides. For the price you get so much (RGB, TG sidepanel, solid build quality). Ofcourse this case is not perfect. As mentioned above its provided default cooling options leave it lacking in a technical aspect, and my biggest gripe with it is the fact that the indent for the sidepanel is not big enough, so the glass sticks out like a sore thumb. If that wasnt a problem, this would be the best case on the market for me, but no case is without its flaws after all. I think that even with all of the cons, this is still a great case and as mentioned, I am very satisfied with it and would reccommend it whole heartedly to anyone.
Good job Cooler Master! A spectacular visually appealing case!
5.0 out of 5 starsThis has got to be one of the best 'bang for the buck' cases out there.Very satisfied with this product.
Reviewed in the United Kingdom on 5 May 2018
For this price you get a tinted tempered glass side panel, 3 RGB fans and enough space for an ATX build.
The RGB fans do not have super detailed functionality, but they have several different color switch modes and settings to choose from, making them the perfect 'babies first RGB set' to play around with. (another pro to the RGB is they dont need any software, just wire them to the reset switch and select the mode you like)
Pros:
-Great and rigid construction. No cheap non-reusable PCIE slots here.
-Excellent looks, not a solid box shape
-Big enough to house ATX but still very compact in its size
-Easy to work in
Cons:
-No front panel dust filter
-Has a top dust filter but its basically wasted because no fans use it by default (I configured my case to have fans there)
-Thermals can get a bit on the hot side when under load
-Default fans can get loud when under load
-For looks, the indent where the tempered glass side panel is not big enough, so it sticks out ever so slightly outside of the case (biggest con from a visual perspective)
-Reset switch cannot be clicked with your fingers. You have to use some tiny tool like a quetip or a toothpick to click it.
-Front fans need to be positioned on the mesh, otherwise the fans are choked.
In conclusion this is that this case is an incredible deal for all the features it provides. For the price you get so much (RGB, TG sidepanel, solid build quality). Ofcourse this case is not perfect. As mentioned above its provided default cooling options leave it lacking in a technical aspect, and my biggest gripe with it is the fact that the indent for the sidepanel is not big enough, so the glass sticks out like a sore thumb. If that wasnt a problem, this would be the best case on the market for me, but no case is without its flaws after all. I think that even with all of the cons, this is still a great case and as mentioned, I am very satisfied with it and would reccommend it whole heartedly to anyone.
Good job Cooler Master! A spectacular visually appealing case!
Images in this review
- Reviewed in the United Kingdom on 17 September 2019Size Name: MB520Style Name: RGBVerified PurchaseThe MB520 RGB is a well designed case at a great price point.
The front of the case has enough gaps with mesh dust filters to allow good intake of air, and 1 rear fan ensures air flow over all the components, and also at stock you have positive air pressure that is good for keeping the dust out of the system.
The RGB can be controlled by the included controller that you can link to the Reset Switch and that will change the RGB Mode, or if your motherboard has an RGB header, you can link to this.
Plenty of room to work inside. Cable management is easy to get right.
This doesn't have some of the problems that other "budget" cases have. No sharp edges, the rivets are painted black, it's a tempered glass side not acrylic.
I will list the corners cut that a more expensive case would have - the holes to manage cables do not have rubber flaps, the lack of front USB type C and the "not quite as sturdy" feeling plastic of the front of the case - but I don't think these warrant losing my 5 star review as you can't get anywhere close to this price with a known established branded case with 3 RGB fans and 1 exhaust fan
Top reviews from other countries
- Amazon CustomerReviewed in the United States on 9 October 2022
5.0 out of 5 stars Case is alright not great. Purchase 3 times
Size Name: MB511Style Name: RedVerified PurchaseI have purchased this cause a few times for pc's that I built for other people. Mostly due to the price. The side window is not glass which I prefer. Putting fans in the front can be a pain due to areas that are hard to reach but its workable from inside case with very long screwdriver. It doesn't look bad after complete build. My last case was used. I didn't order used. The accessories were missing Screws, stand offs, etc. I know whats missing because I bought the case 2 previous times, and this usually is in a small box sitting in HDD area. Taking off front panel where fans go was scratched. The case was great the first 2x but used and missing parts I don't like.
Amazon CustomerCase is alright not great. Purchase 3 times
Reviewed in the United States on 9 October 2022
Images in this review
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GuilhermeReviewed in Brazil on 17 August 2022
5.0 out of 5 stars Gabinete excelente
Size Name: MB520Style Name: RGBVerified PurchaseMaterial de boa qualidade, resistente. Muito bonito!
- Nick NiceReviewed in the United States on 29 September 2020
5.0 out of 5 stars I like it!
I was iffy on buying this case but so far its grand. Ive had it for a few weeks now. Great air-flow, and so on. I didn't want something to over-the-top and this filled my needs for sure. I got it super quick from LA, and im in ohio.
Nick NiceI like it!
Reviewed in the United States on 29 September 2020
Images in this review
- YogesReviewed in Singapore on 28 January 2021
5.0 out of 5 stars Easy to configure.
Size Name: MB530PStyle Name: ARGBVerified PurchaseSimple and nice.
-
Bruno MauriceReviewed in France on 22 May 2025
5.0 out of 5 stars Bon boitier sans prétention
Size Name: MB520Style Name: RedVerified PurchaseUn boitier parfait pour un prix raisonnable, à noter que la vitre est en plastique. Pas de lumière intégrée sauf sur le bouton d'allumage.
Product summary presents key product information
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Product Summary: Cooler Master MasterBox MB511 - ATX PC Case with Front Mesh Panel, Racing Intakes, Transparent Side Panel, Flexible Air Flow Configurations - Red Accent
From Cooler Master
4.6 out of 5 stars, 6,070 ratings
Customer reviewsPrice
One-time purchase: £91.13
All prices include VAT.
About this Item
- FINE MESH FRONT PANEL - Designed for demanding gaming systems, the front and top panel employ a fine mesh to ensure high-volume airflow while filtering dust.
- MULTIPLE FAN AND RADIATOR CONFIGURATIONS - Front: 3 x 120mm, 2 x 140mm* fans, and up to a 360mm radiator with a maximum thickness of 50mm excl. fans. Top: 2 x 120/140mm fans and up to a 240mm radiator. Rear: 1 x 120mm fan and radiator.
- EDGE-TO-EDGE TRANSPARENT SIDE PANEL - Showcase your build through the lightweight acrylic side panel.
- EXPANDING THE POSSIBILITIES - Spacious interior layout accommodates standard form factor ATX motherboards for gaming needs (Mini-ITX, Micro-ATX, Standard ATX).
- MAIN COMPONENTS CLEARANCE - Supports CPU coolers (air/liquid) up to a height of 165mm, graphic cards (GFX) up to a length of 410mm and power supplies (PSU) up to a length of 180mm.
Product description
Options Available
Size Name
- MB500
- MasterBox 500
- MB510L
- MB511
- MB520
- MB530P
- MasterBox 540
Style Name
- ARGB
- Black
- Blue
- RGB
- Red
- White
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