PCIe to 4-Port 2.5G Ethernet Adapter Realtek RTL8125B Chipset

Break the 1G Barrier—Unlock 2.5X Speed on Four Ports

Is your network stuck at 1 Gigabit speeds? This PCIe to 4-Port 2.5G Ethernet Adapter featuring the Realtek RTL8125B chipset is the perfect upgrade for pfSense firewalls, NAS setups, and high-speed networking applications. Designed for seamless 2.5GbE networking, this adapter boosts performance without requiring expensive 10Gb infrastructure upgrades—all while using standard Cat5e cables.

Compatible with ZimaBoard, ZimaBlade, and other PCIe-enabled devices, this adapter delivers reliable multi-port networking for advanced setups.

• 2.5X Faster Speeds – Move large files and stream high-resolution media effortlessly.
• 4x High-Performance Ports – Each supports 10/100/1000M/2.5Gbps auto-negotiation.
• Plug & Play – Fully compatible with Windows, Linux, macOS, and FreeBSD (pfSense 2.6.0+ Ready).
• PCIe 2.1 Interface – Ensures stable high-speed data transfer with MSI & MSI-X support.
• Jumbo Frame Support – Handles up to 16K byte frames for efficient network traffic management.
• Perfect for: NAS, pfSense & OpenWrt firewalls, cloud servers, gaming, and ultra-fast LAN setups.

• Chipset: Realtek RTL8125B
• Number of Ports: 4 x 2.5GbE RJ45 LAN Ports
• Speed: Supports 10/100/1000M/2.5Gbps auto-negotiation
• Interface: PCI Express 2.1
• Standards Compliance: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
• Interrupt Support: PCI MSI & MSI-X
• Jumbo Frame Support: Up to 16K bytes
• OS Compatibility:
  • Windows OS
  • Linux OS
  • macOS
  • FreeBSD / pfSense 2.6.0+
  • DOS
• System Requirements: PCIe-enabled device with an available PCIe slot
• Shipping List:
  • 1x PCIe to 4-Port 2.5G Ethernet Adapter
  • 1x Low Profile Bracket (for compact PC/server builds)