Highpoint RocketRAID 4321. Host interface: PCIe. Processor clock speed: 1200 MHz, Built-in processor: Intel IOP348. Certification: FCC, CE. Operating temperature range (T-T): 5 - 55 °C, Storage temperature range (T-T): -20 - 80 °C, Operating relative humidity range: 5 - 60 %. Connectivity technology: Wired, Compatible operating systems: Microsoft Windows 2008, 2003, XP, 2000, Vista Linux FreeBSD Mac OS X