Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00)
$5.99
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The Master Box Q300L is your straightforward option in the lineup of the brand new Master Box Series from Cooler Master. A Series that might be small in size but excels in functionality and modularity without compromising on the thermal performance. Although the size wouldn’t tell, the Master Box Q300L supports a standard ATX PSU which we don’t see often in the market with this size. Based on the different system setup, the I/O panel can be adjusted to six different locations, three options at each side of the case. You can decide which setup fits your system best. Due to the cube design of the frame and special pattern design on the magnetic dust filter will make the chassis stand out from the rest. The combination of a practical design and the unique customizable outlook makes the Master Box Q300L The perfect choice for office and home.
Ample Interior: Explore ample interior space for Micro-ATX or Mini-ITX motherboards, ensuring easy and future expansion
Components Clearance: Accommodates CPU coolers with a max height of 159mm, GPU cards up to 360mm, and PSU up to 160mm in length.
Versatile Cooling: Maximize cooling performance with a 240mm liquid cooler and 5 fans.
Modular I/O Panel: You have the flexibility to adjust its position at the front, top, or bottom on both sides
Edge-To-Edge Panel: Show off your meticulous build through the transparent side panel with pride.
Open Thermal Design: The perforated design on all sides promotes optimal airflow and heat dissipation
Magnetic Dust Filters: The unique pattern of the dust filter adds a distinctive appearance to the case.
13 reviews for Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00)
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$5.99
Austin S –
Best money you can spend on a cheap case
The good:Very good value for money. Case is well built despite being so cheap. I have a full length RTX 5060 Ti in this with room to spare for fans on the front of the case. Cable routing options are good. Plenty of space to run and tuck cables behind motherboard tray. I like the subtle grey/black color scheme.The bad:It’s a little flimsy in spots, but it’s 40 bucks and not gonna be moved a lot.Overall:If you want a basic, small, cheap but still very capable case for your next build, this is it. Will probably by another for my next build.
Elijah b. –
Stylish and Practical for a Budget Build
I’ve been using the Cooler Master Q300L for a few weeks now, and I really like it. First off, it looks great—clean design, tempered acrylic side panel shows off my build nicely. The magnetic dust filters are a lifesaver; keeping the inside clean is way easier than my last case.It’s compact but still roomy enough for a Micro-ATX board, a decent GPU, and a couple of extra fans. Cable management isn’t perfect, but it’s manageable if you take your time.For the price, this case gives you style, functionality, and solid airflow without breaking the bank. Definitely recommended for a budget-friendly build.
Atomic Penguin –
Interesting Inexpensive SMALL Case – Challenging Build
An interesting little “small form factor” case. Key word here is “small”. Seems to be relatively well made. Option to move the position of the front panel is clever, BUT you have to be sure everything will fit. I moved my front panel to the top edge of the case (see photo) , but then had to “void my warranty” with a Dremel tool to get a Cooler Master HYPER 212 Halo air cooler to fit (it looks great).Plenty of room in back for cable management, plenty of room for a PSU. BE CAREFUL about the length of your GPU. Plenty of room for two 140mm fans in front. Had to use 120’s on top and in back. VERY little clearance between motherboard and frame of the two Cooler Master MF120(2) fans on top. The motherboard is actually touching the frame of the fans (!). But everything works fine.Also, very difficult (impossible?) to connect the ‘upper’ power cables to motherboard while in place. I routed the cables through the corner of the case, connected them, and THEN installed the motherboard.The case has “El Cheapo” break-out PCIE slot covers – but remember that this is a VERY inexpensive case.The overall case is quite aesthetic and well thought out. Just remember that there is not much room in the case, so the build may be challenging.
Matt –
Good Budget friendly micro-atx case
Great value micro-atx case. Its cheap and works. Like the compact size and the fact it came with screws, spacers, ties and a fan.I like the magnetic dust filters concept however BEWARE of the very rough and pointed edges which could cut you while handling them.The power button on the side panel worked for me but could be a problem with other builds. I was barely able to fit two Thermalright TL-C14C 140mm fans in the front with the default front facing power button+LED panel layout, while managing the power/led/usb cables in between the two fans to the backpanel but it was a very tight fit. You can move the power panel to top bottom or rear if you have the space. My Thermaltake Smart 700W PSU blocked the bottom though. While the top was blocked the height and size of the Thermalright Phantom Spirit 120 SE Black CPU Cooler. And the rear was blocked by case fan and no real access for cable management through to the back panel. So I had to make the front faced orientation to work, which it did.All in all I am happy with the value of the product.
Matthew R. Bieker –
Possibly the best budget case in existence
I had to build a computer for my parents on like a day’s notice (long story). So I searched Amazon for budget cases with basic features. I found this one, and I must say, I’m almost jealous of the thing. It’s really compact and nice, and the dust covers are a stroke of genius. They just pop on with magnets, so you can pull them off and clean them any time. Also, you can set this up vertically like a standard case, or horizontally if you prefer. You can move the power switch and USBs and whatnot to several other positions (it comes with them middle-front on the left side as seen in pictures). The only thing I didn’t enjoy was installing the mobo standoffs, which is really tight. Also, in my specific case, I was using an older power supply that isn’t modular and had about a million cables I didn’t need, which I really had to stuff into the area behind the mobo. I think that’s a pretty specific problem to my particular build tho. Overall, I absolutely love this case and feel it has to be about the best case there is at this price point.
jordi De Leon –
Good case for a low price
This seems like a great option, especially with its affordable price and sleek, minimalist design.
Timothy J Parker –
Inexpensive MATX case with good airflow
This is an inexpensive MATX case with good airflow, but I should have been paying better attention when I ordered it and taken into account that front mounting a water cooler was not a good idea with a long video card like a RTX 4080 Super. I ordered it for a new build, but repurposed it for a small file server. It flows air! Components staying cool are not an issue. The description on how to flip the USB/Audio/Power Switch/Reset switch leave a LOT to be desired, and I ended up breaking it. I lost the reset switch (no big deal) and had to Super Glue it back together. That is the only reason for the two star deduction. The case itself is awesome.
Sum Girl –
Good tower case for a mini size motherboard
Easy to assemble, comes with clear instructions, all needed screws were included. Seems sturdy and durable, computer stays plenty cool with vents. 7 USB ports. Fits with my mini size motherboard.
Praf3l –
So this q300l case was released by cooler master in 2018This Case was q500l 2019-2020 predecessorThis case has holes in top, front and bottomI had 5 fan laptop cooler on which this Case is sitting right now, my laptop had fan issues so now it’s used for PC case coolingI have attached 2 arctic fans 140mm 1600rpm and 120mm ,1200rpm in front for intake2 coolermaster fans one for exhaust (xtraflow 1500rpm) backcand one for top ( 200-1000 rpm)1 circle fan (1000-1200) rpmMy PC temp with just one exhaust fan was around 45-55 during normal usage and CPU temp was around 64-74 degrees on normal to heavy load and gpu temps were 50 – 60 degreesCPU fan was spinning at 1500 rpm maxAfter bumping up AMD wraith Cooler fan to max fan speed of 2600 rpm in bios settings, my CPU temps went down to 50 degrees.After installing all the fans,My case temps are 36-39 degreesMy CPU temp is at 42 degrees normal and at 57 on load.If your buying this case get at least 2-4 fansYou can 140mm fans or radiator in the front onlyOn top only 120mm can be attached properlyI could be wrong depends on brand and size of 140mm fanMy arctic fan screw holes weren’t able to match on top of the case.The magnetic dust filter on top and front can be cleaned easily.The side panel is acrylic, fingerprint magnet.2 USB 3.0 jacks in frontMic and headphones Jack with HD audio but can only do 5.1 channel not 7.1.I had to attach my 7.1 channel headphone in the backCable management very goodLot of spaces in the back.If you have radiator then your CPU temps will get better than mine .This case should cost around 3500 rupeesBut I had no choice but pay up 4500 rupeesCuz it I needed it urgently.This pandemic has really screwed PC enthusiast when it comes to pricing of PC components.4/5My PC specsAMD 1300X 3.8ghz (2018)Sapphire pulse RX580 8gb OC lite (2020) 😑Ballistix red 16gb (2020)😑Cooler master 550 mwe psu (2018)Acer vgo monitor 144hzLG monitor 75hz
Kee –
1) Cable management that does not suck, that’s a big advantage2) Can be placed under the monitor on the desktop, rubber pieces on the long side3) With 3 PWM-driven chassis coolers it is a silent beauty4) Overclocked graphics card temperature is below 65°, that’s very nice airflow5) The side panel is acrylic, not glass, which is so so, but pretty fine for a budget setup6) Buttons and USBs can be rebased at any side, but I just kept them as-is7) Very careful and lovely use manual, showing all necessary addons for different setups8) Loved the included rubber pieces for easy placing of the SSDsWould definitely recommend it!
Daniël –
Goede kast met aardig wat mogelijkheden! Had zelf een kast nodig die niet te veel ruimte innam en niet al te duur was. Ik ben positief verrast.
Douglas P. P. Silva –
O gabinete é ótimo e super bonito, o que mais me chamou atenção dele foi o design super compacto e a versatilidade de usar, mas apenas de ser bonito, ele tem os seus defeitos.O acrílico é super fácil de arranhar, enquanto eu estava mudando as peças do meu antigo gabinete para esse, eu deixei o acrílico encima da minha cama com todo o cuidado do mundo, porém, quando eu fui fechar o gabinete com o acrílico, eu vi um pequeno arranhão no canto inferior direito, de início eu não dei muita importância, mas com o reflexo da lâmpada do meu quarto eu achei vários e vários pequenos arranhões que só podem ser vistos na luz, eu simplesmente não entendi o que causou aquilo, já que eu tive o máximo de cuidado possível, mas para quem vai comprar esse gabinete, cuidem do acrílico!E de resto ele me agradou muito, acho incrível como a Cooler Master consegue fazer excelentes gabinetes com preços incríveis. Apesar de ser um gabinete M-ATX, tem como você colocar até 6 fans de 120mm nele que eu achei super top e bacana. Recomendo d+.
Thomas Harris –
This case is really good. I use PC part picker and I highly recommend it for beginners but this case is very cheap if you can’t afford a very expensive case and I had no issues I’m using it my pre-build as a home server to store all my stuff and so far it’s been fine with temperature. What’s good about this case? It’s very small and compact and easy and it’s not that heavy and the filters are easy to change.