Lekuo PR27R11 · 10GbE PCIe x1 Network Card

Realtek RTL8127 · RJ45 · 10G/5G/2.5G/1G · Full 10Gbps on PCIe 4.0

⚡ Full 10Gbps on PCIe 4.0

✅ PCIe x1 — full bandwidth on Gen4	✅ 1.79W power at 10G — lowest in class
✅ Realtek RTL8127 — 2025 chipset	✅ Multi-Gig 10G/5G/2.5G/1G auto
✅ Low profile bracket included	✅ UK stock — fast dispatch

Chipset	Realtek RTL8127
Host Interface	PCIe Gen4 x1 (fits x1, x4, x8, x16 slots)
Network Port	1× RJ45 10GBASE-T
Supported Speeds	10G / 5G / 2.5G / 1G / 100M / 10M (auto-negotiation)
Maximum Cable Reach	100m (Cat6a at 10G)
Jumbo Frames	Up to 16 KB
PXE Boot	Legacy PXE + EFI PXE
Wake-on-LAN	WoL + Realtek RealWoW!
Power Consumption	1.79W (10G) · 1.37W (5G) · 1.21W (2.5G) · 0.92W (1G)
VLAN	802.1Q + 802.1ad (Double VLAN)
RSS	Quad-core Receive-Side Scaling
PTP / Sync-E	IEEE 1588v1, 1588v2, 802.1AS
Offloading	TCP/UDP checksum (IPv4/IPv6), Large Send v1/v2
Operating Temp	0°C to +70°C
Card Dimensions	80 × 45mm
Certifications	CE, FCC

Ultra-Low Power — Perfect for Always-On Systems

At just 1.79W under full 10G load, the RTL8127 is the most power-efficient 10GbE controller available. That's less than half the power draw of competing AQC113 cards (2.5–4W) and a fraction of older Intel X540/X550 cards (6–12W). For NAS boxes and servers running 24/7, the savings add up — and lower power means less heat, quieter operation, and longer component life.

Perfect For

🖥️ NAS & Storage Full 10G on Synology, QNAP, TrueNAS, Unraid — even on older PCIe 3.0 NAS models where x1 cards can't deliver.	🏠 Home Labs Faster iSCSI and SMB for Proxmox, ESXi, Hyper-V. RSS support boosts multi-VM network performance.
🎬 Video Editing Edit 4K/8K footage directly from network storage. 10Gbps = 1,250 MB/s, matching NVMe SSD speeds.	🏢 Small Business Fast file transfers, backup acceleration, and smooth multi-user access to shared drives.

OS Compatibility

Windows	Windows 10, 11, Server 2022
Linux	Kernel 2.4.x+ (Ubuntu, Debian, CentOS, RHEL)
TrueNAS / FreeNAS	Supported
Proxmox / ESXi	Supported (community driver for ESXi)
Unraid	Supported

IEEE Standards

802.3an (10GBASE-T) · 802.3bz (2.5/5GBASE-T) · 802.3ab (1000BASE-T) · 802.3u (100BASE-TX) · 802.1Q (VLANs) · 802.1ad (Double VLAN) · 802.1P (Priority) · 802.3x (Flow Control) · 802.3az (EEE) · IEEE 1588v1/v2 PTP · 802.1AS (Sync-E)

What's in the Box

📦 1× Lekuo PR27R12 PCIe 4,0 x1 10GbE Network Card

🔧 1× Low Profile Bracket (full-height pre-installed)

📖 1× User Manual