StarTech PEX2S953 PCI Express RS232 Card, 2 Ports

Bring RS232 connectivity back to systems that no longer include native serial ports. The StarTech PEX2S953 adds two DB9 serial connections through a PCI Express slot, making it easier to keep printers, modems, point-of-sale devices, and industrial controllers online without relying on USB adapters or external converters. This card is designed for environments where serial communication must remain predictable. It supports a maximum baud rate of up to 921.6 Kbps and includes a 256-byte FIFO cache, helping maintain stable data handling across connected devices. The Asix AX99100 chipset provides the foundation for broad compatibility, while support for Windows and Linux simplifies deployment across mixed operating environments. As a replacement for the PEX2S952, this model is a practical fit for teams standardizing on a known serial expansion path. It is especially useful where uptime, device compatibility, and clean internal integration matter more than temporary workarounds. For infrastructure teams maintaining legacy equipment, this card preserves access to serial workflows while keeping the host system modern and uncluttered.