A RAID controller allows your computer to treat an array of drives as a single logical unit, speeding up data storage and providing redundancy in case one drive fails. The Dell 44GNF RAID Controller (a PERC H730) is built to manage up to 255 SAS-connected drives over 8 ports and two?(2) Internal HD Mini??SAS (SFF??8643) connections. It connects to your Dell PowerEdge Server via its high-speed PCI Express 3.0?x8 connection and ensures speedy storage with its generous 1?GB 1333?MT/s DDR3 cache. This Dell 44GNF RAID Controller has been removed from a working unit, tested for complete functionality by our expert in-house Dell-Certified Technician, and is ready to ship today! Purchase with confidence, as the photos above represent the exact quality of your items, and come bundled with our 90 Day Warranty. *Please note, we have additional refurbished Dell Server RAID Controllers in stock; feel free to send a message and we will update the quantity to suit your specific needs.* Thank you for choosing AltaTech for all of your lightning-fast IT needs!