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Black aluminum Mini-ITX tower chassis with clean front panel

iStarUSA

iStarUSA Inc. S-21 Mini-ITX Server Chassis

SKU CH-0JA6-JCGWF MPN S-21

Compact Mini-ITX aluminium tower with two 2.5" drive bays and front USB ports

  • Form factorTower
  • Chassis styleTower
  • Housing materialAluminum
  • Supported motherboard sizesMini ITX
  • Product colorBlack
  • Mini-ITX support fits 17 cm boards
  • Aluminium front panel creates a clean, gap-free look
  • Two internal 2.5″ drive bays provide storage capacity
  • Single expansion slot adds upgrade flexibility
  • Compact 3.5″ × 8.9″ × 8.3″ tower saves desk space

Compact Mini-ITX Enclosure

The iStarUSA S-21 is a tower chassis built for Mini-ITX motherboards measuring 17cm by 17cm. Its aluminium front panel and steel structure create a clean, gap-free appearance suited to entertainment or industrial settings. The compact footprint fits limited desk or rack space while supporting a single power supply. Builders needing E-ATX or dual-PSU layouts should look elsewhere.

Two 2.5-Inch Drive Bays

Two internal 2.5-inch bays provide room for a pair of SSDs or laptop-class hard drives, enough for an operating system plus a modest data volume. Only one expansion slot is available, so a single add-in card such as a GPU or NIC can be installed. The single included fan mount handles basic airflow; high-heat configurations will require careful thermal planning.

Front USB and RoHS Compliance

Two front-facing USB ports give convenient access for peripherals or install media without reaching around the back. The chassis meets RoHS green-compliance standards, confirming restricted-substance limits in its materials. No rear I/O cut-outs beyond the standard Mini-ITX shield are described, so port selection depends entirely on the chosen motherboard.

How it compares

Measured against everything we stock in Rackmount Server Cases, at today’s prices. Recalculated every night.

Price $91.99
Cheaper than about 91% of the 1,005 comparable items (median $222.99).

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Specifications

Product
Brand nameiStarUSA
Product colorBlack
Size & build
Form factorTower
Chassis styleTower
Housing materialAluminum
Compatibility
Supported motherboard sizesMini ITX

Questions about this item

Will my existing Mini-ITX motherboard measuring 17cm by 17cm fit inside this chassis?

Yes, the S-21 is designed for full-range Mini-ITX boards at exactly 17cm x 17cm, so your current board will mount without modification.

How can I verify the single supported fan is spinning correctly once the system is assembled?

Power on the chassis and watch the fan through the vent; you should see steady rotation and hear low airflow noise indicating the cooling path is active.

Does the box include a power supply or must I purchase one separately for the single supported PSU slot?

No power supply is installed or included; you must buy a compatible unit separately for the one supported PSU bay.

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