Add four independent Gigabit Ethernet ports from one PCI Express x4 slot and keep network expansion simple. The StarTech ST1000SPEX43 is built for systems that need multiple wired connections for segmentation, testing, virtualization, or multi-network access without consuming additional slots or external adapters. Its Realtek RTL8111G chipset provides a proven foundation for dependable Ethernet connectivity in client, server, and workstation environments. The plug-in card form factor fits standard internal deployments where a clean installation and predictable port density matter more than convenience accessories. This card is a strong fit for infrastructure teams that need to separate traffic, attach to multiple subnets, or add redundant paths while preserving chassis space. For TAA-oriented procurement and enterprise environments, it offers a practical way to increase port count through a single PCIe x4 interface while keeping the system internal, organized, and serviceable.