Controller card is a piece of hardware that acts as an interface between the motherboard and other components of the computer. Most computers have all the necessary controllers built in the motherboard. However, if you add additional components such as a SCSI hard drive, you may need to add a controller card as well. Controller cards are typically installed in one of the computer's PCI slots. It is important that you know the component for which you are buying the controller card. The controller card type attribute in the tech specs section tells you the utility of the controller card listed here. You also need to know the interface type of your computer to determine the compatibility of the card with your system. In order to buy the right controller card for your system, we recommend that you use the Service Tag look up feature in the Parts For Your Dell tool. This will allow us to identify the processor type and speed of your system and select compatible products for it. Please note that some of our replacement products are provided as kits or assemblies. These kits may contain additional parts required for installation. In case a product is not sold as a kit or assembly, it may require complementary parts for ease of installation. Refurbished Spare Parts are parts retrieved from Dell-branded systems that have been returned, some of which have never been used. All Dell refurbished spare parts are certified to comply with all original Dell factory performance specifications and come with a 90-day limited hardware warranty. Dell’s limited hardware warranty covers defects in materials and workmanship in your Dell-branded hardware products. For additional details on our warranty services, please visit www.dell.com/warranty Device Type: Storage controller (RAID) - plug-in card Bus Type: PCIe x8 Interface: SAS Data Transfer Rate: 300 MBps Buffer Size: 256 MB (installed) / 512 MB (max) Supported Devices: Disk array (RAID) Channel Qty: 2 Max Storage Devices Qty: 32 RAID Level: RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60 Pricing Type: Refurbished Microsoft Certification: Works with Windows Vista Manufacturer Warranty: 90 days warranty Device Type: Storage controller (RAID) - plug-in card Host Bus: PCIe x8 Interface: SAS Data Transfer Rate: 300 MBps Buffer Size: 256 MB (installed) / 512 MB (max) Supported Devices: Disk array (RAID) Channel Qty: 2 Max Storage Devices Qty: 32 RAID Level: RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60 Processor: LSI LSISAS1078 Slots: 1 x memory Interfaces: 2 x SATA 3Gb/s / SAS ( external ) Compatible Slots: 1 x PCI Express x8 Works with Windows Vista: Software and devices that carry the Works with Windows Vista logo have been tested for baseline compatibility with PC's running. Pricing Type: Refurbished Service & Support: Limited warranty - 90 days