QNAP AC QXG-25G2SF-CX6 Dual-port SFP28 25GbE network expansion card lowProfile

Balance Tech
In stock


QNAP AC QXG-25G2SF-CX6 Dual-port SFP28 25GbE network expansion card lowProfile

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

The QXG-25G2SF-CX6 features an NVIDIA Mellanox® ConnectX®-6 Lx SmartNIC controller, supports PCIe Gen4 (backwards compatible with Gen3/ Gen2) and provides up to 25 Gbps transfer speeds. By using Port Trunking to combine multiple ports, up to 50GbE can be achieved for accelerating file sharing and intensive data transfer. With SR-IOV support, the QXG-25G2SF-CX6 greatly boosts network efficiency and is ideal for I/O-intensive and latency-sensitive virtualization applications and data centers.

High-speed 25GbE Networking

The TS-h3088XU-RP supports 25GbE networking, and can be used with the QXG-25G2SF-CX6 to expand network connectivity. It can also be used with a 25GbE Switch to build a budget-friendly high-speed network environment.

Strengthen Your virtualization Environment with SR-IOV and RoCE

The QXG-25G2SF-CX6 supports SR-IOV, which can allocate bandwidth resources from a physical network card directly to VMs. It ensures reliable VM applications and reduced CPU overheads. The QXG-25G2SF-CX6 also supports RoCE, which can access a network directly in RAM to effectively reduce latency and enhance performance and efficiency for VMware® virtualization environments.


1. SR-IOV is supported by specific QNAP NAS models and should work with SR-IOV compatible adapters.

2. Both the NAS that installs the QXG-25G2SF-CX6 and the receiving-end devices must support RoCE. If the receiving devices do not support RoCE, it will use TCP/IP.

NVIDIA Mellanox ConnectX-6 Lx
Number of Ports
2 x SFP28
PCIe and Lanes
PCIe Gen4 x8
Transmission Rates
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)
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
How many physical functions per host
Supported NAS operating systems
QTS 4.5.2/QuTS hero 4.5.3(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 Content
1 x Network card 1 x QIG 3 x Brackets

QNAP Systems Inc.
Mfg Part #:
Part #:

Good to know