The U3 2nd full aluminium alloy MATX chassis after the V4 in the Jonsbo range.

U3 has given up optical drive and larger graphics card support, but it does support most of the graphics cards which are within 260mm, standard PSII PSU and CPU cooler within 175mm.

Specs:

• Model: U3 (Silver)
• Dimension: 208 mm (W) x 359 mm (H) x 270 mm (D) (12mm feet not included)
• Material:
  • Body: 2.0mm Aluminum Alloy
  • Back / Side plates: 1.5mm Aluminum Alloy
• Motherboard: MATX / ITX (within 245mm x 245mm)
• Drive Bay:
  • Base plate sharing either 2 × 2.5" or 1 × 3.5"
  • Side HDD rack 1 × 3.5"
• Front I/O: USB3.0 × 2, Audio × 1, Mic × 1
• Power Supply: Standard ATX PSU
• CPU Cooler: Not higher than 175mm
• Display Card: Not longer than 260mm
• Expansion Slot: 4
• Cooling System: 1 × 120mm fan (built-in on rear plate)
• Fan Speed Control: Switch for adjusting fan speed
• NET/Gross Weight: 2.5kg / 3.1kg