QNAP All NAS Models with A PCIE SLOT. FOLLOW The Compatibility Guide HTTPS

QNAP QXG-25G4SF-BCM is a low-profile, plug-in network adapter designed to deliver 25 Gigabit Ethernet connectivity for servers and workstations that require higher bandwidth for storage, virtualization, and data-intensive workloads. The card installs in a PCIe 4.0 x8 slot to add four SFP28 ports that support 25 Gbps links, enabling faster data transfer and reduced network congestion for connected systems.
Built around a Broadcom BCM57504 controller, the adapter supports RDMA over Converged Ethernet and iSCSI Extensions over RDMA to help reduce CPU overhead and lower latency for storage traffic, while SR-IOV and IEEE quality-of-service standards provide enhanced virtualization and traffic management capabilities. The compact, low-profile form factor makes it suitable for rackmount and small-footprint systems that need multiport 25 GbE connectivity.