This article covers StarTech.com GbE 4ポート増設PCI Express対応ネットワークLANアダプタカード 4x Gigabit Ethernet拡張用PCIe NICカード ST1000SPEX43.

Overview

The StarTech.com ST1000SPEX43 is a PCI Express network adapter card that adds four independent Gigabit Ethernet ports to a desktop, server, or workstation. Powered by the Realtek RTL8111G chipset, each port delivers up to 1000 Mbps throughput, making it an affordable solution for multi-network connectivity. Fully compliant with IEEE 802.3/802.3u/802.3x/802.3ab standards, the card supports Auto MDIX, Wake-on-LAN, and 9K jumbo frames. It works with a wide range of operating systems including Windows 10/11, Linux, macOS, and FreeBSD, making it a versatile choice for both business and home lab environments.

Connectivity & Compatibility

Interface: PCI Express x1 (works in x4/x8/x16 slots) Ports: 4× RJ45 Gigabit Ethernet Chipset: Realtek RTL8111G (broad OS compatibility) Supported OS: Windows 10/11, Linux, macOS (select versions), FreeBSD Standards: IEEE 802.3, 802.3u, 802.3x, 802.3ab Note: Low-profile bracket not included; you may need to purchase one separately for small form factor cases.

Product Info

Released around 2015, the ST1000SPEX43 remains a popular choice due to its reliability and value. Pricing on Japan is approximately ¥24,500. The card comes with a 2-year hardware warranty and lifetime free technical support from StarTech.com. Accessories include the card and standard bracket only; drivers are downloaded from the manufacturer's website. Market positioning is mid-range. It offers excellent cost-per-port compared to Intel-based enterprise NICs, making it ideal for SMBs, home labs, and budget-conscious server builds.

Best Use Cases

Home lab enthusiasts: Build multiple network segments with a single card — perfect for experimenting with routers, firewalls, or VLAN setups. Small office / server administrators: Add redundant or aggregated network connections to file servers or backup servers without breaking the bank. Virtualization users: Expand physical NIC count for VMware or Hyper-V virtual switches, improving network performance in multi-VM environments. Always verify chipset compatibility with your hypervisor. Not recommended for: Users needing 10GbE or higher speeds, or those requiring a low-profile bracket out of the box.

Product Disclosure (Amazon)

  • Manufacturer: StarTech.com(スターテック)
  • Seller: Startech Japan KK
  • Fulfilled by: Amazon
  • ASIN: B015FTXD0Y
  • Note: This article covers a manufacturer-made product based on Amazon listing details.