This article covers GiGaPlus 2.5Gb PCIe ネットワークカード 2500Mbps イーサネットインターフェースアダプター Realtek RTL8125B Wake on LAN 2.5G NIC準拠 Windows.

Overview

The GiGaPlus 2.5Gb PCIe Network Card is a PCIe expansion card featuring the Realtek RTL8125B chipset, providing wired connectivity up to 2.5 Gbps — 2.5 times the bandwidth of traditional Gigabit Ethernet. It's an affordable upgrade for desktop PCs that lack built-in 2.5G LAN, ideal for speeding up file transfers, network backups, and high-bandwidth tasks. The card ships with both a standard and a low-profile bracket, ensuring compatibility with a variety of desktop cases. OS support spans Windows 11/10/8.1/7, Linux, and macOS.

Connectivity & Compatibility

The card installs into any PCI Express slot (x1, x4, x8, or x16) and uses the Realtek RTL8125B Phy to support 2.5GBASE-T, while remaining backward-compatible with 1000BASE-T and 100BASE-TX. Wake-on-LAN is supported, enabling remote wake-up over the network. Under Windows 10, the driver is automatically recognized; for other operating systems, drivers are readily available from Realtek's official website. The included low-profile bracket allows installation in slim or small-form-factor desktop cases.

Product Info

Launched in 2023, the GiGaPlus 2.5Gb PCIe Network Card is priced around ¥10,000 (~$70 USD). It sits in the entry-to-mid tier, offering a cost-effective path to upgrade from 1G to 2.5G wired networking. The manufacturer provides lifetime technical support. Package contents include the network card (standard bracket pre-installed), a low-profile bracket, and a quick-start guide. It is widely available via major online retailers like .

Best Use Cases

This card is ideal for users who want to upgrade their desktop's network performance without replacing the motherboard. It's particularly beneficial for NAS owners who frequently transfer large files — the jump to 2.5 Gbps significantly reduces waiting times. Creative professionals handling large video or design files will also appreciate the faster local network speeds. Finally, if you already have a 2.5 Gbps-capable router or switch but your PC only has 1 GbE, this card is a simple and affordable upgrade. Do note that to achieve 2.5 Gbps speeds, all network devices along the path must support the same standard.

Product Disclosure (Amazon)

  • Manufacturer: GigaPlus
  • Seller: Ｂ＆Ｂストア
  • Fulfilled by: Ｂ＆Ｂストア
  • ASIN: B0CHRPTYG9
  • Note: This article covers a manufacturer-made product based on Amazon listing details.