- 500W Redundant High-efficiency 80PLUS Platinum Level (94%+) Power Supply - 4x 3.5" Hot-swap SAS / SATA Drive Bays - 1x Slim DVD-ROM Drive (optional) - 3x 4cm Counter-rotating PWM Fans - 2x Full-height I/O Expansion slots & 1x Low-profile I/O Expansion slot - Power Switch, Reset, UID Button & 5 LED Indicators - Full SES2 support is available with SAS motherboards and other compatible components.