QNAP offers various cost-effective network expansion cards for businesses & organizations to upgrade the bandwidth of their QNAP NAS to accommodate intensive data transfer & virtualization applications. The 10 Gb E network expansion card uses a Mellanox Connect X Smart NIC controller to accelerate backup/restore tasks for an ever-growing amount of data & intensive data transfer. i SER is also supported to optimize VMware virtualization performance. Controller: Mellanox Connect X-4 Lx Connector: SFP+ PCIe interface: PCIe Gen 3 x 8 Transmission rates: 10 Gbps Supported operating systems: QTS; Windows (Driver required); Linux (Driver required) Supported QNAP NAS: Models with PCIe slot (s) (1 free slot required) Bracket: Low-profile bracket pre-installed; full-height & specialized (for selected QNAP NAS) brackets are bundled Port & cable: SFP+ DAC cable (1.5M, 3M, 5M) or SFP+ OPTIC transceiver