Computer Case Inter-Tech S31B Midi Tower Black

The Inter-Tech IPC S31B is a compact, cost-efficient server-style computer case designed for Mini Server systems and ITX motherboards. Constructed from durable materials with precise workmanship, the case provides space for one 3.5" or 2.5" drive, an 80 mm front fan, and a dual-PCI slot layout with multiple rear cutouts for serial and USB connectors.

Advantages

The case combines a small footprint (270 mm × 230 mm × 167 mm) with support for ITX motherboards and a dual-PCI slot configuration. It includes six cutouts suitable for DB9/DB15 ports and one cutout for a dual-USB port at the rear, an 80 mm front fan for airflow, a perforated slot bracket, and two front USB 2.0 ports. The unit is lightweight (approx. 2.965–3.71 kg depending on configuration) and offers a reliable enclosure for server or compact workstation builds.

Suitable for

• Compact mini server builds with ITX motherboards
• Small office or home server installations
• Embedded systems requiring serial DB9/DB15 connectivity
• Projects needing a dual-PCI slot and front USB 2.0 access

Key specifications

• Type: Server / Midi Tower
• Supported motherboard form factor: ITX
• Drive bays: 1 × 3.5" (compatible with 2.5")
• Front fan: 1 × 80 mm
• Rear I/O cutouts: Six for DB9/DB15 plus one for dual-USB
• Front ports: 2 × USB 2.0
• Dimensions (W × D × H): 270 × 230 × 167 mm
• Weight: approx. 2.965 kg (product data) / 3.71 kg (packaged)
• Colour: Black

How to use

Install an ITX motherboard and, if required, fit a single 3.5" or 2.5" drive in the internal bay. Mount expansion cards into the dual-PCI slots and route any serial connectors through the six DB9/DB15 rear cutouts; use the dedicated rear cutout for a dual-USB module if needed. Connect power supply (not included) according to the motherboard and drive requirements, and ensure the 80 mm front fan is connected for proper cooling. Align the perforated slot bracket for optimal ventilation and secure all panels before operation.

Recommendations

For reliable long-term operation, use a compatible low-profile power supply, avoid blocking the front fan intake, and choose components sized for ITX layouts. If multiple serial devices are required, verify connector pinouts before installation to prevent mismatches.