Product SpecificationsController Chip: Realtek RTL8125Host Interface: PCIe x1 (backward compatible with PCIe x4 / x8 / x16 slots)Network Port: 1 × RJ45 Ethernet PortSupported Speeds: 2500Mbps / 1000Mbps / 100Mbps auto-negotiation, full-duplexMounting Brackets: 1 × Full-height bracket (pre-installed), 1 × Low-profile bracketCooling: Red Aluminum HeatsinkOperating Systems: Windows 10/8.1/8/7/XP/Vista (32/64-bit), Windows Server 2012/2008 R2/2008/2003, Linux (kernel up to 5.6)Package Contents1 × FENVI 2.5Gbps PCIe Network Card1 × Low-Profile Mounting BracketImportant Notes1. To reach full 2500Mbps speed, you need to use CAT5e / CAT6 network cable and connect to 2.5G capable router or switch.2. Please download and install the latest official driver.
RTL8125 2.5Gbps PCI‑E Ethernet Card 2500Mbps RJ45 Gaming Desktop Network Adapter
Product Description
1. 2.5Gbps Multi-Speed Auto-Negotiation
Built around the proven Realtek RTL8125 Ethernet controller, this network card supports 2500Mbps / 1000Mbps / 100Mbps auto-negotiation. It delivers full 2.5Gbps full-duplex bandwidth when paired with a 2.5G-capable router or switch and Cat5e (or better) Ethernet cable, while remaining fully backward compatible with all existing Gigabit and Fast Ethernet network equipment.
2. Universal PCIe x1 Host Interface
This adapter uses a standard PCI Express x1 interface, which is compatible with every PCIe slot type on consumer and commercial motherboards: x1, x4, x8 and x16. It installs easily without occupying your primary GPU slot, making it suitable for almost all desktop PC builds and server motherboards.
3. Dual Bracket Design for All Chassis Types
The package includes two mounting brackets to fit different case sizes: a standard full-height bracket pre-installed on the card for regular ATX and mid-tower desktop cases, plus an additional low-profile bracket for compact SFF PCs, HTPCs and 2U rackmount enclosures. One kit works across all your systems with no additional hardware required.
4. Efficient Red Aluminum Heatsink
Large red stacked aluminum heatsink provides excellent heat dissipation. It effectively lowers chip temperature during long‑time high‑load data transmission, prevents thermal throttling, speed drop and unexpected disconnection, keeps consistent 2.5G network performance.
5. Wide System & Application Compatibility
The card works natively with 64-bit editions of Windows 10 and Windows 11, with driver support built into most modern system versions. It is ideal for a wide range of use cases including home gaming PCs, office workstations, home NAS devices, soft routers and small form factor builds.
Product Specifications
Controller Chip: Realtek RTL8125
Host Interface: PCIe x1 (backward compatible with PCIe x4 / x8 / x16 slots)
Network Port: 1 × RJ45 Ethernet Port
Supported Speeds: 2500Mbps / 1000Mbps / 100Mbps auto-negotiation, full-duplex
Mounting Brackets: 1 × Full-height bracket (pre-installed), 1 × Low-profile bracket
Cooling: Red Aluminum Heatsink
Operating Systems: Windows 10/8.1/8/7/XP/Vista (32/64-bit), Windows Server 2012/2008 R2/2008/2003, Linux (kernel up to 5.6)
Package Contents
1 × FENVI 2.5Gbps PCIe Network Card
1 × Low-Profile Mounting Bracket
Important Notes
1. To achieve full 2.5Gbps speed, please use Cat5e or higher Ethernet cables and ensure your router, switch or NAS also supports 2.5Gbps Ethernet. The card will auto-negotiate to the highest mutually supported speed.
2. Please download and install the latest official driver.
3. The low-profile bracket is designed for compact SFF cases and 2U rackmount chassis. Standard full-tower desktops can use the pre-installed full-height bracket directly.
