The StarTech PEX4S553 is a 4-Port Native PCI Express RS232 Serial Adapter Card with 16550 UART that lets you add 4 RS232 (DB9) serial ports, using a single PCI Express expansion slot. This 4-port serial adapter card allows you to harness the full capability offered by PCI Express (PCIe), while reducing the load applied to the CPU by as much as 48% over conventional bridge-chip serial cards. Plus, it includes 4 half-height/low-profile brackets, allowing the card to be installed into almost any PC case, regardless of form factor.

Brand New - A brand-new, unused, unopened, undamaged item in its original packaging.

This item comes with a Limited Lifetime manufacturer's warranty.

• 256-byte deep FIFO per transmitter and receiver
• Includes half-height/low profile mounting brackets
• Native single-Chip, single lane PCI Express
• Four high speed RS232 serial ports, with support for data transfer rates up to 128000bps
• Compliant with PCI Express Base Specification 1.1
• Built-in 16C450/550 compatible UART

• Device Type: Serial adapter
• Dimensions (WxDxH): 1.9 cm x 13 cm x 12 cm
• System Requirements: Linux, Microsoft Windows Server 2008 R2, Microsoft Windows Vista (32/64 bits), Microsoft Windows 7 (32/64 bits), Microsoft Windows XP (32/64 bits), Microsoft Windows Server 2003 (32/64-bits), Windows 8 (32/64 bits), Windows 10 (32/64 bits)
• Weight: 80 g
• Form Factor: Plug-in card
• Interface (Bus) Type: PCI Express 1.1 x1
• Ports Qty: 4 ports
• Data Link Protocol: RS-232
• Data Transfer Rate: 128 Kbps
• Processor: 1 x MosChip Semiconductor MCS9904CV-AA

• 1 x StarTech 4 Port Native PCI Express RS232 Serial Adapter Card with 16550 UART PEX4S553
• 1 x Bracket with 2 DB9 Male Ports
• 4 x Low Profile Brackets
• 1 x Driver CD
• 1 x Instruction Manual