S300 - Gaming Case - Front I/O USB 3.0 Type - C Port - SFX Power Supply 100-130mm -Cable Management System - luminum Mini-ITX Motherboard Small Portable for PC (PCIe 3.0 16X Riser Cable)
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AI Verdict
This is an 8.1L aluminum Mini-ITX case with USB-C, mesh panels, and a PCIe 3.0 riser for compact builds that can live with tight clearance limits.
This case makes sense if your top priority is shrinking a gaming PC into an 8.1L aluminum shell without giving up a real desktop GPU. It is much less forgiving if you want oversized air cooling, easy cabling, or plug-and-play PCIe riser behavior.
If this is too cramped, move up to a small case with at least 70mm CPU cooler clearance and native PCIe 4.0 riser support.
Regret Score™
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Pros
- Only 12.2 x 5.3 x 7.6 inches, so it fits where most tower cases do not
- Front I/O includes both USB 3.0 and USB-C on a budget-priced small form factor chassis
- Three mesh panels help this cramped layout breathe better than closed sandwich cases
- Supports 100-130mm SFX or SFX-L power supplies instead of forcing a proprietary brick
- Includes a PCIe 3.0 x16 riser and allows GPUs up to 305mm long and 130mm wide
Cons
- You must manually force the motherboard PCIe setting to Gen3 or the included riser can stop the system from booting
- CPU cooler clearance tops out at 60mm, which rules out most tower coolers
- Cable routing is tight because the whole chassis is only 8.1 liters
Dimension Scores
Three mesh panels and room for a real GPU help airflow, but the 8.1L size still limits thermal headroom.
Mesh-heavy panels do not trap fan noise, so quiet operation depends more on your cooler and GPU than on the case itself.
The aluminum shell and integrated handle-style design feel more premium than most budget Mini-ITX boxes.
An 8.1L interior with SFX cabling, a riser, and a long GPU is workable, but not forgiving.
Best For
- Portable Mini-ITX gaming builds you carry between rooms or to LAN nights
- Living-room PCs where a full ATX tower looks absurd
- Compact builds using a short SFX PSU and a GPU under 305mm
Not Recommended For
- Air-cooled builds that need a tall 120mm tower cooler
- First-time builders who want roomy cable routing and easy part swaps
Watch Out For
- The BIOS needs to be set to PCIe Gen3 before using the included riser, or the machine may not post at all.
- CPU cooler height is capped at 60mm, so even many low-profile coolers are out once you add RAM and motherboard heatsinks.
- GPU clearance is advertised up to 305mm long and 130mm wide, but thick cards still make cable routing miserable in an 8.1L shell.
- The case only supports 100-130mm SFX or SFX-L power supplies, so a standard ATX PSU is not an option.
Full Specifications
| ASIN | B0BG22FT8R |
| Brand | KXRORS |
| Color | S300 White |
| Series | S300 |
| Fan Size | 60 Millimeters |
| Material | Aluminum |
| Case Type | Mini-Tower |
| Model Name | S300 |
| Item Weight | 4.4 pounds |
| Manufacturer | KXRORS |
| Cooling Method | Air |
| Product Dimensions | 5.31 x 12.28 x 7.6 inches |
| Item Dimensions LxWxH | 5.31 x 12.28 x 7.6 inches |
| Number of USB 2.0 Ports | 1 |
| Number of USB 3.0 Ports | 1 |
| Motherboard Compatability | Mini ITX |
| Power Supply Mounting Type | Internal |
| Recommended Uses For Product | Gaming |
What Buyers Say
The main reason people buy this case is obvious: it is tiny without looking cheap. Owners usually like the aluminum shell, the front USB-C port, and the fact that a real desktop GPU can fit in something this small. The catch is that this is not a beginner-friendly enclosure. The PCIe 3.0 riser setup trips people who leave their motherboard on Auto, and cable routing gets tight fast once you add an SFX PSU and a long card. People who treat it like a compact enthusiast case tend to be happy; people expecting roomy ATX convenience are not.
“looked awesome on my shelf but i had to fight the riser and redo cables twice before it stopped acting weird”
Common Praise
- Actually feels small on a desk at 12.2 x 5.3 x 7.6 inches
- Front USB-C is useful on a case this size
- Mesh panels help keep compact parts from cooking themselves
- Fits a real GPU instead of forcing an APU-only build
Common Complaints
- BIOS must be switched to PCIe Gen3 before the riser behaves
- 60mm cooler limit kills a lot of easy cooling choices
- Cable routing turns messy quickly with stiff PSU leads
- Large GPUs fit on paper but make the interior painfully tight
Ownership Tips
- Short custom PSU cables make a bigger difference here than in almost any mid-tower.
- Dust shows up quickly because the mesh panels are always breathing.
- It is much easier to service if you pick a low-profile cooler and a not-too-thick GPU from the start.
Frequently Asked Questions
Does this case support full-size ATX motherboards?
No. It is built for standard 170 x 170mm Mini-ITX boards only.
Can I use a large graphics card in this case?
Sometimes. The listing says up to 305mm length, 130mm width, and roughly 2.5-slot thickness, so big triple-fan cards need careful measuring.
Why does the product mention setting PCIe to Gen3?
The bundled riser cable is PCIe 3.0. If your board tries to negotiate Gen4 automatically, some systems will fail to boot until you lock the slot to Gen3 in BIOS.
Will a tall tower CPU cooler fit?
No. CPU cooler height is limited to 60mm, so you need a low-profile cooler or an AIO-free build strategy.
Is there decent airflow for gaming parts?
Better than many tiny cases, yes. The three mesh panels help, but this is still a dense Mini-ITX layout that depends heavily on part selection and cable discipline.
Buying Guide
With tiny Mini-ITX cases, clearance numbers matter more than marketing photos. You need to check PSU length, CPU cooler height, and GPU width before you order anything. On this case, the PCIe 3.0 riser is also a real setup requirement, not a footnote. If you want easy assembly, buy a slightly larger chassis instead of trying to brute-force oversized parts into 8.1 liters.
8.1L chassis volume
This is the difference between a backpack-size build and a normal desktop tower, but every liter you save also removes working room.
60mm CPU cooler clearance
That number decides whether you can use a simple air cooler or need to shop only in the low-profile section.
305mm GPU support
A card can match the length limit and still be annoying if it is too thick or leaves no space for cables.
PCIe 3.0 riser
Think of it like a bridge between the motherboard and GPU; if the bridge is Gen3, your BIOS often needs to match it.
Alternatives
If this feels too cramped, look for a compact ITX case with more CPU cooler height, a PCIe 4.0 riser, and cleaner PSU cable space.
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