Professional 10G SFP+ Fiber Network Card for Enterprise Applications
The Lekuo PCIe 10G SFP+ Fiber Network Card delivers enterprise-grade fiber optic networking performance with the energy-efficient Realtek RTL8127 chipset. Featuring ultra-low 1.79W power consumption and fanless operation, this professional network adapter is engineered for servers, workstations, and high-performance computing environments requiring reliable 10 Gigabit fiber connectivity.
🔷 Key Features
Realtek RTL8127 Chipset - Industry-Proven Reliability
Powered by the trusted Realtek RTL8127 controller with excellent driver support across Windows Server, Linux, FreeBSD, and VMware ESXi. Mature chipset architecture ensures stable operation in mission-critical fiber optic environments.
🔌 SFP+ Fiber Connectivity - Maximum Flexibility
Single SFP+ port with integrated LED indicators for link status and activity monitoring. Supports all standard SFP+ modules and DAC cables:
- ✅ 10GBASE-SR - Multi-mode fiber up to 300m
- ✅ 10GBASE-LR - Single-mode fiber up to 10km
- ✅ 10GBASE-ER - Single-mode fiber up to 40km
- ✅ DAC Cables - Direct Attach Copper for short-range connections
- ✅ 1G SFP - Backward compatible with Gigabit modules
⚡ PCIe 3.0 x2 Interface - Energy Efficient Design
PCIe 3.0 x2 electrical interface (compatible with x4/x8/x16 slots) provides sufficient bandwidth for full 10Gbps throughput while minimizing power consumption. Compact low-profile design fits both standard and small form factor systems. Includes both full-height and low-profile brackets.
🌿 Ultra-Low Power Consumption - 75% Less Than Intel X520
- ✅ Only 1.79W at 10G - Industry-leading power efficiency
- ✅ 0.29W at 1G - Minimal idle power consumption
- ✅ Fanless Operation - Silent, reliable, maintenance-free
- ✅ 24/7 Operation - Ideal for always-on servers and NAS systems
- ✅ Reduced Heat - Lower cooling requirements for data centers
🔧 Professional-Grade Construction
Gold-plated PCIe edge connector ensures reliable electrical contact and long-term durability. High-quality multi-layer PCB design with passive cooling provides excellent signal integrity and EMI shielding for sustained high-bandwidth fiber optic operations.
💼 Ideal Applications
- ✅ Enterprise servers and data centers with fiber infrastructure
- ✅ High-performance workstations requiring long-distance connectivity
- ✅ Network-attached storage (NAS) systems with fiber SAN
- ✅ Virtualization hosts (VMware ESXi, Proxmox, Hyper-V)
- ✅ Media production facilities with fiber backbone
- ✅ Campus networks and building-to-building connections
- ✅ Low-power, fanless server builds and edge computing
📋 Technical Specifications
📦 Package Contents
- ✅ 1x Lekuo PCIe 10G SFP+ Fiber Network Card
- ✅ 1x Low-profile bracket for compact systems
- ✅ 1x User manual with installation instructions
Note: SFP+ modules and fiber cables sold separately
❓ Frequently Asked Questions
Q: What chip does this Lekuo 10G NIC use, and what are its core advantages?
A: This NIC features the brand-new Realtek RTL8127ATF chip. Its core advantages are ultra-low power consumption (only 1.79W) and fanless silent design, reducing power usage by up to 75% compared to traditional Intel X520 NICs, making it ideal for 24/7 low-energy operation.
Q: Do I need to manually install drivers when using it under Windows or Linux?
A: The NIC supports native drivers for Windows 10/11 and Linux kernels 2.4 and above. It is plug-and-play on most modern operating systems, with no tedious manual installation required. If a driver is needed, please click the "Download RTL8127 Driver" button at the top of this page to download it.
Q: What is the practical significance of 1.79W low power consumption for home servers? Will it generate excessive heat?
A: The ultra-low 1.79W power consumption means extremely low heat generation. Thanks to this, the NIC uses a pure passive fanless cooling design, operating completely silently and effectively avoiding throttling or crashes in small hosts or NAS devices due to overheating.
Q: My motherboard only has PCIe x16 slots. Can I install this PCIe x4 NIC?
A: Yes. Although the NIC has a PCIe x4 physical interface (with PCIe 3.0 x2 bandwidth), it is fully compatible and can be inserted into PCIe x4, x8, or x16 slots on your motherboard and work normally.
Q: What types of optical modules or cables does this SFP+ port support?
A: The SFP+ port offers broad compatibility, supporting SR multimode modules (up to 300m), LR single-mode modules (up to 10km), ER modules (up to 40km), as well as DAC direct-attach copper cables, allowing flexible choices based on your networking distance.
Q: Does this SFP+ port only support 10G speeds? Can it downshift to 1G Gigabit?
A: This port supports dual-rate switching. It not only supports full 10Gbps (10GBASE-R) speeds but is also backward-compatible with 1Gbps (1000BASE-X) Gigabit, allowing integration into existing Gigabit network environments.
Q: What are the dimensions of this NIC? Can it fit into a rackmount server or a mini-ITX case?
A: Its PCB is very compact at just 80×45mm. The slim half-height low-profile design makes it suitable not only for standard cases but also for space-constrained Mini-ITX small-form-factor cases, 1U rackmount servers, and various thin IT devices.
Q: Compared to commonly available used Intel X520 NICs, what advantages does the Lekuo RTL8127 offer?
A: The Intel X520 is an older-generation chip with generally higher power consumption (around 5W–7W) and significant heat output, often requiring active fans or strong airflow. In contrast, the Lekuo RTL8127 reduces power to 1.79W (saving up to 75%), not only saving energy but also enabling silent passive cooling, making it better suited for home and noise-sensitive environments.
Q: Is this NIC suitable for 24/7 soft routers or all-flash NAS devices?
A: Absolutely. Devices running 24/7 demand extremely high power efficiency and stability. The RTL8127's low heat output means slower component aging and longer lifespan, and paired with excellent system compatibility, it is the perfect companion for DIY high-performance 10G soft routers and all-flash NAS builds.
💾 Driver Download
Download the latest RTL8127 driver package for optimal performance:
⬇️ Download RTL8127 Driver PackageSupports Windows, Linux, FreeBSD, and VMware ESXi
Why Choose Lekuo?
We specialize in enterprise-grade storage and networking solutions for professional environments. Every product undergoes rigorous quality testing to ensure reliable performance in demanding fiber optic applications. Backed by technical support and warranty coverage for peace of mind.