Description:1. 2.5Gbps High‑Speed NetworkPowered by Realtek RTL8125 chip, auto‑negotiates 2.5G/1G/100M/10Mbps. Surpasses traditional 1G Ethernet for fast NAS, raw video and game file transfers. Delivers low‑latency stable connection for gaming, better than wireless networking.2. Red Aluminum HeatsinkStacked red aluminum heatsink handles heavy‑load heat dissipation. Prevents thermal throttling, speed drops and disconnections for sustained 2.5G performance.3. Dual Mounting BracketsFull‑height & low‑profile brackets included. Fits ATX towers, SFF and HTPC compact chassis.4. PCI‑E X1 InterfacePCI‑E X1 slot, backward compatible with X4/X8/X16. Easy install for desktops without native 2.5G LAN. Great for gaming PC, workstation and NAS.PCI‑E Ethernet Card 2.5Gbps RTL8125 Chip RJ45 Gigabit LAN Adapter for Desktop PCDescription:

1. 2.5Gbps High‑Speed Wired Network Performance

Built‑in Realtek RTL8125 main chip, supports auto‑negotiation of 2500Mbps /1000Mbps /100Mbps /10Mbps. Break through the limits of traditional 1Gbps gigabit ethernet. Greatly shorten waiting time when transferring large NAS files, raw video resources and game library. Stable low‑latency wired connection brings smoother gaming experience compared with wireless network.

2. 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.

3. Two‑Size Bracket for Different PC Cases

Comes with full‑height standard bracket and low‑profile half‑height bracket. You can switch brackets freely to fit full‑size tower desktops and compact SFF / HTPC small chassis, greatly improving installation compatibility.

4. Standard PCI‑E X1 Interface

Adopts PCI‑E X1 slot, backward compatible with PCI‑E X4 / X8 / X16 motherboard slots. Easy to install for desktop PCs without 2.5G network port. Perfect hardware upgrade for gaming PC, workstation and home NAS FENVI

Chipset: Realtek RTL8125

Interface: PCI‑E X1 (backward compatible with PCIe x4 / x8 / x16 slots)

Network Port: 1 × RJ45 Ethernet Port

Supported Speed: 10/100/1000/2500Mbps auto‑negotiation

Standards: IEEE 802.3, 802.3u, 802.3ab, 802.3az, 802.3bz

Network Media: 10Base-T (Cat3+), 100Base-TX, 1000Base-T (Cat5+), 2.5GBase-T Auto

MDIX: Yes (Auto crossover detection)

LED Indicators: 100M / 1G / 2.5G Link/Act Advanced

Full Duplex Support: Yes (IEEE 802.3x flow control)

Cooling: Red Aluminum Heatsink

Bracket: Full‑height bracket + Low‑profile bracket

Supported OS: Windows10, Windows11, Linux

Package Includes:

1 x RTL8125 2.5G PCI-E Gigabit Ethernet Adapter

1 x Low Profile Bracket

Important Notes

1. To reach full 2500Mbps speed, you need to use CAT5e / CAT6 network cable and connect to 2.5G capable router or switch.

2. Driver official installation is required for full function.

3. Please confirm available PCI‑E slot on your motherboard before purchase.