What PC Case Do I Have?

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Specifically, if you’re a casual PC user, you might not know very much about your rig. Likewise, figuring what sort of computer you have, and what sort of case it’s in, is a good place to start. For this reason, if you want to upgrade or add hardware you will know what to do.

To demonstrate, if your case cannot fit an extra HDD drive, and you purchase one. What to do? Swear, take it back, neither. On the contrary, you can buy a USB portable HDD add on.

So, knowing the size of your case and its capabilities is important. Another key point to consider is motherboard form factors.

Motherboard Form Factors

What are the motherboard form factors and how are they different? There are dozens of form factors for computers, many of which are either obsolete or developed for proprietary applications.

For this reason, the majority of consumer motherboards sold are one of these form factors: Mini-ITX; Micro-ATX; ATX; and Extended-ATX.

Mini-ITX (M-ITX)

Formerly, the Mini-ITX, created by VIA for its low power C3 processor. Now adopted by motherboard manufacturers for use with both AMD and Intel chipsets. In detail, Mini-ITX boards measure: 17 cm x 17 cm (6.7" x 6.7"). In fact, Mini-ITX motherboards are perfect for small home computers and Home Theatre PCs (HTPCs).

At the present time, Mini-ITX boards line up with four of the mounting locations used by most ATX boards. Therefore, a Mini-ITX board should fit in any Micro-ATX or ATX case.

Micro-ATX (M-ATX)

Until now, created by Intel, Micro-ATX, is one of the most popular motherboard formats. In particular, Micro-ATX motherboards vary in size, the maximum is 244 mm x 244 mm (9.6" x 9.6"). For this reason, Micro-ATX motherboards can be smaller. To emphasize, must use standard ATX mounting locations and will fit in any Micro-ATX or ATX case.

In general, Micro ATX has many formats and supports most sockets. Similarily, chipsets are the same as ATX boards but lack extra expansion slots due to the smaller size. For example, take note, a newer GPU may not fit on the motherboard.


Overall, the most popular motherboard format, dating all the way back to 1995. ATX motherboard size: 305 mm x 244 mm (12" x 9.6") and certainly, will fit into any ATX case. Consequently, the board is too large for Mini-ITX and Micro-ATX cases.

As a result, the popularity of the ATX format provides unlimited combination of features from different manufacturers. As an illustration, budget boards to fully loaded enthusiast overclocking products with extra slots and require a big power supply. Finally, unless you have a small build or smaller requirement, the ATX is the way to go.

Extended-ATX (E-ATX)

In general, the Extended-ATX is a larger version of ATX. In detail, E-ATX size is: 305 mm x 330 mm (12" x 13"). Therefore, E-ATX boards will only fit into cases made specifically for them. Although, there are still some boards out there, they are rare, you can usually find them in workstations and servers.

Important to realize, manufacturers will always give you case measurements, so you can use that to determine fitting of parts.

To figure out what case you have, let’s start by talking about the three most common types of PC cases. It’s likely you have one of the three following styles.

Desktop Case

In general, everyone has seen the good old desktop computer case, a boxy design made to sit on the desktop. For the most part, used in the business office to save space with the monitor on top. On the whole, these computers usually had 1 possibly 2 fans.

The Full Tower

If you are planning a bigger build with lots of components, then a full tower, is the way to go. Additionally, these towers are around 30 inches and can hold between six and ten different drive bays. Moreover, if you are a power user, or gamer, this is the tower you will likely have.

By and large, usually supports the biggest motherboards up to E-ATX and sits on the floor.

The Mid Tower

A mid tower is smaller than a full tower, standing at a height of around 18 inches. Additionally, holds between 2 and 4 drive bays and is perfect for use in an office, library, school, or home. It also has space for older optical CD/DVD drives.

Mid towers have excellent cable management and is easily transportable due to their mid size. Regardless, this is the most popular and common case on the market. For the most part will support ATX motherboards.

The Miniature Tower (Small Form Factor SFF)

In contrast to the other 2 towers, the Mini Tower is the rarest of the three. As can be seen is about 15 inches tall and holds 3 drive bays at most. At the same time, making it impractical to add fans for additional cooling.

On the positive side, they are small, basic, and inexpensive. As can be seen these are the desktop version of a netbook. Accordingly, the motherboard supported is ITX.

Nevertheless if you don’t know what case you have, it’s likely one of these kinds of cases. In general, these three varieties are the most popular models available on the market. Point often overlooked, is the internal components, you may find brand names on labels.

Does your PC case fit the specifications of a mid tower case? If not, then it’s probably one of the other two.

Case Size

If your case doesn’t fit any of the specifications, then you might be out of luck. You may have a custom case or one that is obsolete. For this reason, if you still cannot figure out and want to know.

Then take a couple of photos of your motherboard and case with dimensions and send me an email. Without delay, we will figure out which case you have. Eventually, we will track down the history of the case.

In the meantime, check specific articles on particular models that seem to fit the general size of your case.

Aside from the three types of cases mentioned in this article, there are a huge variety of case sizes available. In other words, it’s possible your case is not one of the three sizes. However, it is more than likely, that you have one of the three cases here. 

One last thing, I must know what you think, so please comment and I will always reply. Thanks for dropping by and reading.

Click Here to Leave a Comment Below 4 comments
Dalton Ellingson - February 17, 2021

I have an AMD M5A78L-MLX PLUS Motherboard. My plan is to buy A Ryzen 5000 CPU and an MSI B450 TOMAHAWK MAX motherboard to get this thing outta the stone age, but it does sport a pretty decent GeForce GTX 960 Graphics Card which has allowed me to play basically all the Steam games I’ve purchased so far: Age of Empires II, Total War II (both Medieval & Rome) and finally Bannerlord Mount & Blade II.

I just wanna take this PC I bought from a friends reliable Pawn Shop here in my small town and change out those few primary things followed by an $81 pair of Rip Jaw Series RAM sticks @ 8GBs each for a total of 16GBs to start with and a speed of capable of 3,000mh.

Lastly, I wanna do the GPU (might even do it in reverse and get it now since it’s cheap as sin right now sitting at about $239.99 on Amazon and that’ll be a Gigabyte Geforce GTX 1050 Ti OC 4GB GDDR5 How does this all sound to you, my good sir??

So that’s my plan and I HOPE I can stick to it for a multitude of reasons but the primary one being budget Lol. HMU or just respond back to me as soon as it’s convenient for you, my man. Love the website and what you got goin’ on here and what you’re doin’ with it, BTW. It’s awesome! Especially 4 noobs like myself. I JUST got into PCs finally at the age 26 (console lifer here Hahha) and not knowing squat haha. Helps out a lot. Anyways man, Adios!

    Jimmy - February 18, 2021

    Hello Dalton,
    The AMD M5A78L-M LX PLUS Motherboard is a 5 year old MB and the GTX 960 GPU is about the same too. A good setup years ago and more powerful than any console at the time. Now as for what you want an AMD Ryzen 5000 CPU and an MSI B450 TOMAHAWK MAX motherboard will not work together. They are 2 different generations apart. Now if you want the latest AMD series of CPU, the 5000 series is the latest and greatest but you may have issues finding one. On the other hand, if you are on a budget and want to stick to it, go with the MSI B450 Tomahawk Max MB and a Ryzen 5 3600 CPU. I suggest you put a list of parts together, for example other things to consider would be a PSU, GPU, RAM, SSD and then a case, have a quick look at my budget case post. Other things I suggest you pickup and will eventually need any way would be tools, anti static mat, and a UPS.
    I appreciate you taking the time to check out my website and many thanks for dropping by.

Dalton Ellingson - March 29, 2021

I meant to say I got a Ryzen 5 3600x, but as of now completed my list to overhaul my current PC with the following parts: M.2 NVME SSD 1TB Western Digital for only $103 but also 2500 write speed, as compared to any SATA 1tb at the same price with a max write/read speed of 560, also got a new PSU: an EVGA 750 B5 80+ BRONZE 750W, Fully Modular, EVGA ECO Mode & with a 5 Year Warranty. Lastly 2x new monitors: Dell S2421HGF 24 Inch FHD TN, Anti-Glare Gaming Monitor – 1ms Response Time, 1080p 144Hz, LED Edgelight System, AMD FreeSync Premium. Each 1 was on sale for $149.99 a pop, usually selling for $179.99. And of course, 2 sticks of Corsair DDR4 RAM that do 3400mhz for a grand total of $79.99.
So now im simply waiting on my: Anti-Static Mat ESD Safe for Electronics, Includes ESD Wristband and Grounding Wire, HPFIX Silicone Soldering Repair Mat 932°F Heat Resistant for computers, which was only 20 bucks. Then finally, so I can get down to business soon when this all shows up, I got a: Kaisi 136 in 1 Electronics Repair Tool Kit, Professional Precision Screwdriver Set, Magnetic Drive Kit with Portable Bag along with the anti-static mat & the grounding wire. That was also only 20-ish dollars.

So since I last posted I did a lot more research and saving to make sure I did this all correctly and that so I could buy what I really wanted & didn’t have to budget buy. Plus, my GeForce GTX 970 Nvidia GPU has turned out to be able to not just ‘handle’ but actually play almost everything I’ve purchased on Steam @ High settings just fine, all while maintaining a very low temp in my PC and no overclocking whatsoever as well. So thank you very much for this insight and help from a while back, I took it and used it for all its worth adn now I am here and I am MUCH less of a PC noob. Although I would, I have much to learn and perfect unlike many of you guys Lol

    Jimmy - March 30, 2021

    Hello Dalton,
    The setup sounds great, you didn’t mention anything about a UPS, so pick one of those up and your rig will be complete. Go here to check that out Then down the road you may want to pick up an external hard drive for your back ups. Click on this link to check that out. Thanks for dropping by and the update. Good luck.


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