Lekuo Single-Port 10G RJ45 Network Card | RTL8127 Chipset | PCIe Gen3 x4
Enterprise-grade 10 Gigabit Ethernet adapter delivering reliable high-speed connectivity with ultra-low power consumption for servers, workstations, and virtualization platforms
Driver & System Support
Supported Operating Systems:
Windows 10/11, Linux 2.4.x and above
Compatible with major enterprise and virtualization platforms for seamless deployment
Speed
10Gbps
Multi-Speed
Ports
1x RJ45
Ethernet Port
Interface
PCIe Gen3 x4
Compatible x8/x16
Power
0.29-1.79W
Ultra-Low Power
Key Features & Benefits
- ✓RTL8127 Enterprise Chipset - Proven Realtek controller delivering stable 10G performance with advanced offload capabilities
- ✓Multi-Speed Auto-Negotiation - Supports 10G/5G/2.5G/1000M/100M/10M for flexible network infrastructure integration
- ✓Virtualization Ready - Full compatibility with VMware ESXi, Proxmox, Hyper-V and KVM for virtual machine networking
- ✓Universal PCIe Compatibility - PCIe Gen3 x4 interface works seamlessly in x4, x8, and x16 slots with backward compatibility
- ✓Ultra-Low Power Design - Industry-leading 0.29W-1.79W consumption reduces operational costs and heat generation
- ✓IEEE Protocol Compliance - Full support for IEEE 802.3 series, IEEE 1588v2 PTP, and VLAN tagging for enterprise networks
- ✓Industrial Temperature Range - Operates reliably from 0°C to +70°C for demanding server room environments
Product Parameters - Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Lekuo |
| Model Name | PCIe x4 to Single-Port 10G Ethernet Network Card |
| Model | PR27R12 |
| Chipset | RTL8127 |
| Interface Type | PCIe Gen3 x4 (Compatible with x8, x16) |
| Data Rate | 10G/5G/2.5G/1000M/100M/10M |
| Power Consumption | 0.29W - 1.79W (depending on speed) |
| Protocol Support | IEEE 802.3 Series / IEEE 1588v2 / VLAN |
| Applications | Enterprise Server, Workstation, Industrial Control, Virtualization Platform |
| Operating Temperature | 0°C to +70°C |
| Storage Temperature | -55°C to +125°C |
| Dimensions | 80mm x 45mm |
| Weight | Net: 43.6g / Gross: 84.7g |
| System Support | Windows / Linux |
⚠️Important Notice - PCIe Bandwidth Configuration
This network card features a PCIe 3.0 x4 physical connector, but the actual bandwidth utilization is PCIe 3.0 x2 (16 Gbps). The x4 form factor is designed for better physical compatibility and secure insertion into PCIe slots. This configuration provides sufficient bandwidth for 10 Gigabit Ethernet operation while maintaining excellent slot compatibility.
🖥️ Servers & Workstations
Upgrade your server or high-performance workstation with reliable 10G connectivity for data-intensive applications, file transfers, and network storage access.
☁️ Virtualization Platforms
Perfect for VMware ESXi, Proxmox VE, and Hyper-V environments. Supports SR-IOV and advanced virtualization features for efficient VM networking.
🌐 Soft Router & Networking
Ideal for pfSense, OPNsense, and other software-defined networking solutions requiring high-throughput, low-latency network interfaces.
📦 Package Includes
- •1 x Lekuo 10G PCIe x4 Network Adapter (Model: PR27R12)
- •1 x Low-Profile Bracket
❓ Frequently Asked Questions
Q1: Is this network card compatible with my operating system?
Yes, the RTL8127-based adapter supports Windows 10/11 and Linux 2.4.x and above. Drivers are available for download from our support page.
Q2: Can I install this card in a PCIe x8 or x16 slot?
Absolutely. While designed for PCIe x4 slots, this card is fully compatible with x8 and x16 slots. It will operate at x4 bandwidth regardless of the physical slot size.
Q3: Do I need to install drivers for this network card?
For Windows and most Linux distributions, drivers may be required for full functionality. We recommend downloading the latest drivers from our website for optimal performance.
Q4: Does this card support virtualization platforms like VMware or Proxmox?
Yes, this network card is fully compatible with VMware ESXi, Proxmox VE, Hyper-V, and KVM virtualization platforms. The RTL8127 chipset is widely supported in enterprise virtualization environments.
Q5: What is the actual throughput performance I can expect?
With proper network infrastructure (10G switch, Cat6a/Cat7 cables), you can achieve near line-rate 10Gbps throughput. Performance depends on your system configuration, CPU, and network setup.
Q6: Can this card work with 1G or 2.5G networks?
Yes, the card features auto-negotiation and supports 10M/100M/1G/2.5G/5G/10G speeds, making it backward compatible with existing network infrastructure while providing upgrade headroom.
Q7: What is the power consumption and does it require additional power connectors?
The card consumes only 0.29W to 1.79W depending on link speed, drawing power entirely from the PCIe slot. No additional power connectors are required, making it ideal for low-power servers and compact systems.
Q8: Does this product come with a warranty?
Yes, all Lekuo network adapters include manufacturer warranty coverage. Please contact our support team for specific warranty terms and technical assistance.
🎯 Ready to Upgrade Your Network Infrastructure?
Experience enterprise-grade 10G connectivity with the Lekuo RTL8127 Network Card