Model No. SST-TJ07B (black), SST-TJ07B-USB3.0 (black) SST-TJ07S (silver) SST-TJ07B-W (black, with window), SST-TJ07B-W-USB3.0 (black, with window) SST-TJ07S-W (silver, with window) Material 4.0mm ~ 8.0mm uni-body aluminum outer frame, 2.0mm aluminum body Motherboard SSI-EEB, Extended ATX, ATX, Micro-ATX Multimedia -- Drive Bay External 5.25" x 7 3.5" x 1 (occupied by front I/O) Internal 3.5" x 6 Cooling System Front -- Rear 2 x 92mm intake fans, 2100rpm, 23dBA Side 2 x 120mm HDD intake fans, 1200rpm, 21dBA Top 2 x 120mm exhaust fan, 1200rpm, 21dBA Bottom -- Internal -- Expansion Slot 7 Front I/O Port USB 2.0 x 4 (SST-TJ07B, SST-TJ07S, SST-TJ07B-W, SST-TJ07S-W only) USB 3.0 x 4 (SST-TJ07B-USB3.0, SST-TJ07S-USB3.0 only) IEEE1394 x 1 (SST-TJ07B, SST-TJ07B-W only) Audio x 1 MIC x 1 Power Supply 2 x Optional standard PS2(ATX) or 1 x Redundant PS2 Operating system support -- Expansion Card -- Limitation of CPU cooler -- Limitation of PSU Unlimited Net Weight 12.9 kg Dimension 220 mm (W) x 560 mm (H) x 565 mm (D)