Qnap Dual Port QSFP28 25GbE N Etwork Card, Low-Profile (Pcie GEN4 X8) QXG-25G2SF-CX6
SKU
392397
Brand
MPN
QXG-25G2SF-CX6
Warranty
Standard Manufacturer's Warranty
Availability
In stock
$892.00
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Dual-port 25 GbE network expansion card
Controller: Mellanox ConnectX-4 Lx
Connector: SFP28
PCIe interface: PCIe Gen4 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)
Low-profile bracket pre-installed; full-height and specialized (for selected QNAP NAS) brackets are bundled
SFP28 DAC cable (3M) or SFP28 OPTIC transceiver
Controller: Mellanox ConnectX-4 Lx
Connector: SFP28
PCIe interface: PCIe Gen4 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)
Low-profile bracket pre-installed; full-height and specialized (for selected QNAP NAS) brackets are bundled
SFP28 DAC cable (3M) or SFP28 OPTIC transceiver
| SKU | QXG-25G2SF-CX6 |
|---|---|
| Brand | QNAP |
| Model | QXG-25G2SF-CX6 |
| Ports | 2 x SFP28 cages (SFP28) |
| Cooling | Built-in fan (custom for QNAP) |
| Features | SR-IOV (virtualization passthrough) RoCE (RDMA over Converged Ethernet) Forward Error Correction (FEC): NO FEC, BASE-R FEC (Firecode), RS-FEC (Reed Solomon) Port Trunking (link aggregation) to combine ports Built-in cooling fan Status indicators: link/activity, link/speed |
| Port Count | 2 |
| Description | The QNAP QXG-25G2SF-CX6 is a dual-port 25GbE SFP28 network adapter powered by an NVIDIA Mellanox ConnectX-6 Lx SmartNIC controller. It provides high-performance connectivity via PCIe 4.0 x8 (backward compatible with PCIe 3.0/2.0), supports port trunking for up to 50GbE combined throughput, and includes SR-IOV and RoCE for improved virtualization and low-latency scenarios. Forward Error Correction (NO FEC, BASE-R FEC, RS-FEC) is supported to improve long-distance link reliability. The card is designed primarily for QNAP NAS but is also compatible with Windows and Linux systems (drivers required for some OS), and ships with full-height and low-profile brackets and a built-in cooling fan. |
| Form Factor | Low-profile plug-in card (PCIe) |
| Identifiers | UPC: 885022021260 ASIN: B099DQNXHP |
| Item Weight | 8.4 ounces |
| Other Notes | Some listings reference operation in PCIe Gen3 slots and varying slot width compatibility; for full PCIe 4.0 x8 performance a PCIe 4.0 x8 slot is required. When used with switches or endpoints that do not support certain features (FEC, RoCE), functionality may fall back or require configuration changes. |
| Manufacturer | QNAP |
| Product Type | Network adapter / Network interface card (NIC) |
| Product Title | QNAP QXG-25G2SF-CX6 Dual-Port 25GbE SFP28 PCIe 4.0 x8 Network Adapter (Mellanox ConnectX-6 Lx) |
| Host Interface | PCIe 4.0 x8 |
| Supported Speeds | 25 Gbps (per port) 10 Gbps (backward compatible) |
| Brackets Included | Full-height bracket Low-profile bracket Specialized/custom low-profile bracket for selected QNAP NAS (varies by package) |
| Packaging Quantity | 1 |
| FEC Details / Notes | Supports NO FEC, BASE-R FEC (Firecode) and RS-FEC (Reed-Solomon). Transmitter and receiver must use the same FEC mode. If switch firmware does not support FEC, disable NIC FEC via the host OS or NAS. |
| Physical Dimensions | Item Dimensions (L x W x H): 5.7 x 7.5 x 2.2 inches |
| Controller / Chipset | NVIDIA Mellanox ConnectX-6 Lx SmartNIC |
| Included Accessories | Bracket set (full-height and low-profile / specialized bracket as provided), card |
| Networking Protocols | 25 Gigabit Ethernet |
| Max Combined Throughput | Up to 50 Gbps (with port trunking) |
| Notes on RoCE and SR-IOV | RoCE requires both the host and receiving devices to support RoCE; otherwise traffic falls back to TCP/IP. SR-IOV support depends on the QNAP NAS model and SR-IOV-capable adapters/hosts. |
| PCIe Backward Compatibility | Compatible with PCIe 3.0 and PCIe 2.0 |
| Supported Operating Systems | QNAP QTS QNAP QuTS hero Windows 10 Windows Server Linux (driver required) |
| Compatibility / Intended Use | Designed primarily for QNAP NAS models (check QNAP compatibility lists); suitable for servers and desktops for I/O-intensive and latency-sensitive virtualization and data center applications. |
| Firmware Version (as listed) | 26.30.1004 (release date: 2021-03-29) |
QNAP DUAL PORT QSFP28 25GbE N ETWORK CARD, LOW-PROFILE (PCIE GEN4 X8)
