CHAS EATX TWR/4U DP XEON 8SATA BAYS 645W LN BLK The SC743 is designed with 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.