Tower / 4U SuperChassis 743 The SC743 high-end workstation/server chassis is designed for whisper-quiet (28dB) performance and power savings with high-efficiency 465W / 665W / 865W power supplies and 100% cooling redundancy** via its combination of high-performance fans and unique air-shroud. It dramatically reduces the possibility of degraded performance due to thermal issues. Moreover, utilizing the 90-degree rotatable 5.25" drive bays, it can be perfectly fitted as a rackmount or a tower system.