Coolermaster Elite 342 (RC-342) is a mini-tower that accommodates micro-ATX, built with a modern black design body & front panel. This chassis maintains Elite’s pedigree of compact-sized & quality build that would look great in any space. Elite 342 maintains a quiet environment while providing the option of adding 80mm or 90mm rear fans to provide the best ventilation possible for a compact system. Features Front mesh design provides superior ventilation to maintain constant cooling Front I/O panel provides easy access for users Side panel security lock hole for higher security Side ventilation holes for better cooling performance Front 120 mm fan provides the best cooling solution Removable HDD cage Specifications Available Color Black Dimension (W / H / D) (W) 180 x (H) 352 x (D) 440 mm (W) 7.08 x (H) 13.85 x (D) 17.32 inches Weight Net Weight: 4.0kg / 8.84 lbs Gross Weight: 5.1kg / 11.24 lbs Material Steel Body ; ABS plastic ; Mesh Front bezel Motherboards Micro-ATX 5.25" Drive Bay 2 Exposed 3.5" Drive Bay 5 Hidden 1 Exposed I/O Panel USB (Universal Serial Bus) 2.0 x 2, Spk x 1, Audio x 1, Cooling System Front: 120 x 25mm fan x 1 / 1200 RPM / 17 d BA (included) ; 80mm / 90mm (not included) Rear: 80 / 90 mm fan x 1 (not included) Expansion Slots 4 The reliable, efficient & affordable line of Elite power supplies is ideal for mainstream & basic computing systems. Built with quality components & dual +12V outputs, the Elite series is fit to handle demands of high power requirements. The eco-friendly design allows the Elite series to reach more than 70% efficiency at typical loading & meet Energy Star & Blue Angel requirements. Compliance with the newest Intel standard ATX 12V V2.3 More than 70% efficiency at typical load operation High performance components design for better reliability Green power design to meet Energy Star & Blue Angel requirements Multiple protection design (OVP/OCP/OPP/SCP) Support dual +12V1 & +12V2 outputs for higher power usage One 4+4 pin +12V CPU connector for high-end CPU EMI & Noise filter built in design 2 Year warranty Model RS500-PSARJ3-UK Type Intel ATX12V V2.31 Dimension (W / H / D) 150 x 86 x 140 mm Input Frequency Range 47 ~ 63 Hz PFC Regular Power Good Signal 100 ~ 500 ms Hold Up Time >17 ms Efficiency >70% Typically MTBF >100, 000 hrs Protection OVP / OCP / OPP / SCP Output Capacity 500W Operation Temperature 0~40?C (Nominal Input Voltage) Fan 120mm Certifications CE / GOST / C-tick Connector M/B 20+4 Pin x 1 CPU 4+4 Pin x 1 4 Pin Peripheral x 3 SATA x 4 4 Pin Floppy x 1 6 Pin PCI-e Connector x 1