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StarTech.com 16 Port PCI Express Serial Card - High-Speed PCIe (PEX16S550LP)
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Adamant Computers - Custom Computers and Gaming PC. Parallel Printer Port PCI Card
2-Port PCI Serial Card - U.S. Converters LLC
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2-Port DB9 (RS-232) Serial PCI Card, 16550 UART, Full Profile | Eaton
1 port Serial RS232 PCI card Powered IO Industrial - Shentek
PCI-E to 8 Port USB 3.0 (2xUSB-C, 6x USB-A ) Expansion Card 5Gbps,Exte – RIITOP
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Quad-Serial Port / RS-232 PCIe Card
StarTech.com 1 Port Low Profile PCI Express Serial Card - 16550 - Add a RS-232 serial port to your standard or small form factor computer through a PCI Express expansion slot -
StarTech.com 2-port PCI Express RS232 Serial Adapter Card, PCIe RS232 Serial Host Controller Card, PCIe to Serial DB9 COM Ports, 16950 UART, Low Profile Expansion Card, Windows/macOS/Linux | www.shi.com