How to find out what case you have
The fastest way to identify your PC case is to look for a label or badge on the outside of the chassis. Most manufacturers print the model name and number on the rear panel, the side panel, or the bottom. Open the case side panel and check the interior walls as well — some makers stamp information on the inside. If you find a label, write down the exact model number; that's all you need to search for specifications online.
If there's no visible label, look at the case design itself. Note the shape (tower, compact, full-size), the color, any distinctive vents or handles, and the approximate dimensions. Take a photo from multiple angles. Then search for "PC case" plus those details on Google Images — you'll often find a match within the first few results. Once you have the model name, you can look up the exact specifications, dimensions, and what components it will fit.
If you built the case yourself or inherited it without documentation, check your purchase receipt, email confirmation, or credit card statement from when it was bought. That record will have the model name. You can also ask in PC building forums like r/buildapc on Reddit — post clear photos and someone will usually identify it within hours.
Key Takeaways
- Check the rear panel, side panel, and bottom of your case first — most manufacturers label the model number in at least one of these places.
- If there's no label, photograph the case from multiple angles and search Google Images with "PC case" plus the color and shape you see.
- Once you have the model name, search the manufacturer's website or retailers like Newegg or Amazon to find the full specifications and dimensions.
- Your original purchase receipt or email confirmation will have the exact model if you bought the case yourself.
- PC building communities on Reddit can identify a case from photos in a few hours if you're stuck.
Where to look for the label
The model label is usually a sticker or engraved text on the back of the case, near the power supply area or above the motherboard tray. Manufacturers like Corsair, NZXT, Lian Li, and Fractal Design consistently place labels in this spot. Wipe away any dust first — labels are often hard to read under a layer of buildup.
Check the bottom panel next, especially if the case has feet or rubber bumpers. Some cases have the model printed on a sticker underneath. You may need to tilt or flip the case to see it clearly. The left or right side panel sometimes has a label as well, usually near the top or bottom edge.
Open the case and look at the interior walls. Manufacturers sometimes stamp or print the model number on the inside of the front panel or the top interior surface. This is less common but worth checking if the exterior is blank.
What to do if there's no label
Cases without labels are usually older models, generic no-name cases, or cases that have had the label worn off. Start by measuring the case. Write down the height, width, and depth in inches or centimeters. Also note the number and size of the fan mounts (how many 120mm or 140mm fans it can hold), the type of power supply mount (top or bottom), and whether the motherboard tray is on the left or right side when you're facing the front.
Search for "PC case [height]x[width]x[depth]" or "PC case [number] 120mm fans" on Google. You can also describe the case on PC building forums — mention the color, the material (steel, aluminum, plastic), any distinctive features like a window or handles, and roughly when you think it was made. Include photos if possible. Experienced builders can often narrow down the manufacturer and era from the design alone.
If the case is truly generic and you can't identify it, that's okay. You only need to know the dimensions and the motherboard form factor it supports (ATX, Micro-ATX, or Mini-ITX). Measure the motherboard tray width and the distance from the front of the case to the back panel. Those two numbers will tell you what size motherboard and components will fit, which is what actually matters for upgrades or repairs.
Using the manufacturer's website
Once you have the model name, go to the manufacturer's official website and search for that model in their product lineup. Corsair, NZXT, Lian Li, Fractal Design, Phanteks, and Thermaltake all have searchable product databases. Enter the model number in the search box and you'll find the full specification sheet, which includes internal dimensions, fan mount locations, maximum graphics card length, maximum CPU cooler height, and power supply compatibility.
read the PDF manual if it's available — it will show you exactly where components go, what size power supply the case needs, and any special features or quirks. The manual also lists the exact dimensions and weight, which is useful if you're planning to move the case or fit it into a specific space.
If the manufacturer's site doesn't have the model listed, try retailers like Newegg, Amazon, or Scan.co.uk. Search for the model number and you'll usually find a product page with specifications, customer reviews, and photos from multiple angles. Reviews often mention compatibility issues or surprises, which can be helpful if you're planning an upgrade.
What specifications matter most
The most important specification is the motherboard form factor your case supports — usually ATX, Micro-ATX, or Mini-ITX. This determines what size motherboard will fit. The second is maximum graphics card length, because a long graphics card can hit the front of the case or the power supply. The third is maximum CPU cooler height, because tall air coolers can touch the side panel or the top of the case.
Also note the power supply position (top or bottom mount) and the number and size of fan mounts. These affect cooling performance and your options for upgrades. If you're planning to add storage drives, check how many 2.5-inch and 3.5-inch drive bays the case has. For liquid cooling, note whether the case has space for radiators and where they can be mounted (front, top, or rear).
The internal width matters if you're upgrading the motherboard or adding large components. A case that's 18 inches wide is more spacious than one that's 16 inches wide, and that extra space makes cable management and component installation easier.
Checking compatibility before you upgrade
Before you buy a new motherboard, graphics card, or cooler, compare its dimensions against your case specifications. Most product pages on retailer sites list the length, width, and height of components. If your graphics card is 11 inches long and your case only supports 10 inches, it won't fit — even if the motherboard is compatible.
Use online compatibility checkers like PCPartPicker, which will flag conflicts between your case and other components. Enter your case model and the site will show you which motherboards, coolers, and graphics cards will physically fit. This saves you from buying something that arrives and doesn't work in your build.
If you're upgrading the power supply, check the case specifications for the maximum depth and width the power supply can be. Most modern cases support standard ATX power supplies, but compact cases may have restrictions. The manual will tell you the exact limits.
Frequently Asked Questions
What if my case is a custom or handmade build?
Measure the interior dimensions and note the motherboard form factor it supports. You don't need a model name — you just need to know the width, height, and depth, plus what size motherboard fits. Those measurements are all you need to check compatibility with new components.
Can I find my case model from the BIOS or Windows?
No. The BIOS and Windows don't store case information — they only know about the motherboard, CPU, RAM, and storage. You have to identify the case physically by looking at labels, measuring it, or searching for photos that match its design.
Does the case model affect performance?
The case itself doesn't affect CPU or graphics performance, but it affects cooling. Cases with better airflow and more fan mounts keep components cooler, which can help them run more stable. Compact cases often have worse airflow than full-size cases, so they may run hotter under load.
What if I can't find the exact model online?
Measure the case and note the motherboard form factor it supports. You can buy components based on those measurements alone. You don't need the exact model name — you just need to know the dimensions and what size motherboard fits inside.
Should I keep the case manual?
Yes. The manual shows you where components mount, how to route cables, and any special features or limitations. If you sell the PC later, the manual adds value. If you upgrade components, the manual tells you whether they'll fit before you buy them.