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. Compatibility This product is compatible with the following systems: - PowerEdge R210 - PowerEdge R310 - PowerEdge R410 - PowerEdge R415 - PowerEdge R510 - PowerEdge R515 - PowerEdge R610 - PowerEdge R710 - PowerEdge R715 - PowerEdge R810 - PowerEdge R815 - PowerEdge R910 - PowerEdge T310 - PowerEdge T410 - PowerEdge T610 - PowerEdge T710 - PowerVault NX3000