QNAP QXG-25G2SF-CX6 Dual-port 25GbE Network Expansion Card, NVIDIA Mellan ox ConnectX-6 LX SmartNIC Controller, PCIe Gen4, Port Trunking, SR-IOV, RoCe | QXG-25G2SF-CX6

QNAP QXG-25G2SF-CX6 PCIe supported NAS
Dual-port SFP28 25GbE network expansion card; low-profile form factor; PCIe Gen4 x8

Supports SR-IOV and RoCE for Improved Network and VMware® Virtualization Environments

Dual-port 25 GbE network expansion card
Cable CAB-DAC30M-SFP28,CAB-DAC15M-SFP28,TRX-25GSFP28-SR
Controller NVIDIA Mellanox ConnectX-6 Lx
Number of Ports 2 x SFP28
Connector SFP28
PCIe and Lanes PCIe Gen4 x8
Transmission Rates 25Gbps/10Gbps
IEEE Standards IEEE 802.3ae 10 Gigabit Ethernet
25/50 Ethernet Consortium 25G and 50G supporting all FEC modes
IEEE 802.3by 25G supporting all FEC modes
IEEE 802.3ad, 802.1AX Link Aggregation
IEEE 802.3az Energy Efficient Ethernet (supports only “Fast-Wake’ mode)
IEEE 802.3ap based auto-negotiation and KR startup
IEEE 802.1Q, 802.1P VLAN tags and priority
IEEE 802.1Qaz (ETS)
Bracket Low-profile bracket pre-installed; full-height and specialized (for selected QNAP NAS) brackets are bundled
SR-IOV Support
RDMA over Converged Ethernet (RoCE), Zero Touch RoCE (ZTR) Support
VLAN insertion/stripping Support
iSER Support
NVGRE, VXLAN, Geneve Support
How mant virtual functions 512
How many physical functions per host 8
Supported NAS operating systems QTS/QuTS hero (recommend an upgrade to the latest version); Windows (Driver required); Linux (Driver required)
Supported QNAP NAS Models with PCIe slot(s) (1 free slot required)
Support Ubuntu Commercial Linux Distribution Ubuntu 18.04/20.04
Support Windows Windows 8/10
Port and Cable SFP28 DAC cable (3M) or SFP28 OPTIC transceiver
Package Contents 1 x Network card; 1 x QIG; 3 x Brackets

Product Last Updated: 23/11/2025

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