Extra Quiet Fan Module-Suitable for use with most PCIe cards; offers the lowest noise possible Easy Installation-User installable Compatibility-Compatible with all xMac mini Server models Extra Quiet Option for Your xMac mini ServerIf the quietest operating xMac mini Server your ultimate goal, the xMac mini Server Quiet Fan Module will help you achieve it. Easy to install, this module replaces the standard fan module in your xMac mini Server, and is suitable for use with cool-running PCIe cards, including most pro audio, video capture & processing, and many other cards. Because this module's fans spin more slowly and move less air than the standard fan module, this option is not recommended for use with SAS host bus adapters and RAID controllers, Fibre Channel, or 10 Gigabit Ethernet cards.