Controller: Mellanox ConnectX-4 Lx Connector: SFP28 PCIe interface: PCIe Gen3 x8 Transmission rates: 25Gbps/10Gbps 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 and specialized (for selected QNAP NAS) brackets are bundled Port and cable: SFP28 DAC cable (3M) or SFP28 OPTIC transceiver Note: 25GbE NICs are designed for data-intensive applications and enterprise IT environments. To reach the full potential of 25GbE transmission, you require high-performance hardware configurations, including: 1) At least three workstations with Intel Core i5/i7 processors (or similar) at 3.3 GHz (or higher) and NVMe SSDs. 2) A QNAP NAS with an Intel Core i5/i7 processor (or similar) with NVMe SSDs and/or Enterprise-level SATA SSDs (SLC/MLC). At least 12 SSDs are recommended. Item Dimension (L"xW"xH") NA