← How to benchmarkComponent guide
How to check a used case
A case is the one part on this marketplace that cannot fail electrically, which makes people careless about it. What it can do is refuse to fit the parts you already own, arrive without the screws that hold those parts in, and turn a quiet build into a loud one.
The short answer
Measure before you buy: graphics card length, cooler height, radiator support and power supply depth, in millimetres, against the parts you actually have. Almost every bad used-case purchase is a measurement someone assumed rather than checked.
Get these first
Four measurements and one bag of screws
- Check maximum graphics card length against your actual card, including the connector. Manufacturer figures often assume no cable bend and no front fan fitted. Measure your card from the bracket to the far end, add room for the power connector standing proud of it, and compare to the real clearance with the fans that will be in there.
- Check maximum CPU cooler height against your cooler, not against its product line. Tower coolers vary by several millimetres between revisions, and the side panel either closes or it does not. This is the second most common mismatch after card length.
- Confirm radiator support where you intend to mount it, not just in total. A case listed as supporting a 360mm radiator in the front may only support 240mm in the top, and may not clear tall memory with a radiator in the front at all. Support is per-position, and listings rarely say so.
- Ask about the screws and standoffs, and assume the answer is no. The accessory bag is the single most commonly lost part of a used case. Motherboard standoffs, fan screws, drive screws and the front panel bracket are all specific enough to be annoying to replace individually. Price the bag in.
- Test every front panel connector by actually using it. Front USB ports and the audio jack take repeated physical stress and are on a small board or a bundled cable that flexes every time. Plug something into each of them on the seller’s machine if possible, or at least inspect the header cable for damage at the plug.
- Look along the panels at a shallow angle for bends. A case that has been dropped or badly packed will have a bowed side panel or a twisted frame, and a twisted frame means the motherboard tray is no longer square. Panels that need forcing to close are a symptom of this, not of a tight design.
- Count and test the fans that are actually included. Fans are the part of a case that ages, and a case sold with its original fans after five years is a case with five-year-old bearings. Spin each one by hand, listen for grinding, and run them if you can.
- Check the dust filters exist and still fit. Magnetic and clip-in filters get removed for cleaning and never put back. They are not universally replaceable, and a case without them is a case that fills with dust and throttles whatever you put in it.
The one nobody checks
Radiator support by position. Listings quote the largest radiator a case will take anywhere and let the reader assume it applies everywhere. A case that takes 360mm in the front and 240mm in the top is extremely common, and so is a front radiator that fouls tall memory. If you have a specific cooler in mind, confirm the specific position.
Note
Cases hold their usefulness far longer than anything else here — a good chassis from six years ago is still a good chassis, provided the standards it was built around have not moved. The two that have: front panel USB-C, and the room needed for modern three-slot graphics cards. Check both against what you plan to own, not what you own now.
What to measure
Higher is better▲Higher is betterLower is better▼Lower is betterMust be zero∅Must be zeroMust match the spec=Must match the spec
The measurements that decide the purchase
| Metric | Which way | What it tells you | Healthy looks like |
|---|---|---|---|
| GPU clearance vs your card | Higher is better | Whether your existing card physically fits. | Your measured card length plus room for the power connector, with front fans installed. |
| Cooler height vs your cooler | Higher is better | Whether the side panel closes. | Above your cooler’s actual height. Check the revision, not the product line. |
| Radiator support per position | Must match the spec | Where a radiator can actually go. | The size you need, in the position you intend, with your memory height cleared. |
| Accessory bag present | Must be zero | Standoffs and screws specific enough to be irritating. | Present. Assume it is not and price accordingly. |
| Front panel ports working | Must be zero | The parts of a case that take daily physical stress. | Every port and jack tested, not merely present. |
| Frame square, panels flat | Must be zero | Impact damage, which misaligns the motherboard tray. | Panels sit flush without force. Sighting along the edge shows no bow. |
| Included fan condition | Must be zero | The only moving parts in the box. | Spin freely, no grinding. Old bearings are a quiet build turned loud. |
| Dust filters present | Must be zero | Whether the case protects what you put in it. | All present and still clipping in. Frequently not separately available. |
Walk away if
Walk away if
- Clearance figures the seller quotes from the spec sheet rather than measuring.
- A side panel that needs force to close.
- No accessory bag, on a case with proprietary standoffs.
- A front USB port that does nothing.
- Original fans on a case more than a few years old.
- Missing dust filters.
- Deep scratches along one edge, which usually means a drop.
What each fault is worth
Bring the measurement, not the opinion. Name the fault, name the fix, name what the fix costs — that is a solvable problem with two acceptable answers, which is what makes it work.
| What you found | What it actually costs | What to ask for |
|---|---|---|
| No screws or standoffs | A parts hunt before you can build. | The cost of a generic screw kit, plus the inconvenience. |
| Dead front USB or audio | A daily annoyance on a fixed part. | A real discount — the header board is not always available. |
| Tired original fans | A loud build. | The cost of the fans you will replace them with. |
| Missing dust filters | Dust into everything you own. | A meaningful discount; often not sold separately. |
| Bowed panel or twisted frame | A tray that is not square. | Walk away. Everything you mount inherits the problem. |
Ready to go looking?
Take the checklist with you, then browse what is listed. Everything on this page works just as well the other way round when you are the one selling.
Read alongside