![StarTech.com 4 Port PCI Express RS232 Serial Adapter Card - Single-Lane PCI Express - Breakout Cable - RS232 Extension - PCIe Serial Card (PEX4S553B) StarTech.com 4 Port PCI Express RS232 Serial Adapter Card - Single-Lane PCI Express - Breakout Cable - RS232 Extension - PCIe Serial Card (PEX4S553B)](https://m.media-amazon.com/images/I/71DfvZl72NL._AC_UF894,1000_QL80_.jpg)
StarTech.com 4 Port PCI Express RS232 Serial Adapter Card - Single-Lane PCI Express - Breakout Cable - RS232 Extension - PCIe Serial Card (PEX4S553B)
![Amazon.com: StarTech.com 4 Port PCI Express PCIe Serial Combo Card with Breakout Cable - 2 x RS232 2 x RS422 / RS485 - Dual Profile (PEX4S232485) : Electronics Amazon.com: StarTech.com 4 Port PCI Express PCIe Serial Combo Card with Breakout Cable - 2 x RS232 2 x RS422 / RS485 - Dual Profile (PEX4S232485) : Electronics](https://m.media-amazon.com/images/I/71sAYhwsSFL._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com 4 Port PCI Express PCIe Serial Combo Card with Breakout Cable - 2 x RS232 2 x RS422 / RS485 - Dual Profile (PEX4S232485) : Electronics
![StarTech.com 2S1P PCI Serial Parallel Combo Card with 16550 UART - IEEE 1284 Card - Serial Parallel PCI - PCI Serial Adapter (PCI2S1P) StarTech.com 2S1P PCI Serial Parallel Combo Card with 16550 UART - IEEE 1284 Card - Serial Parallel PCI - PCI Serial Adapter (PCI2S1P)](https://m.media-amazon.com/images/I/51lQrqg8FPL._AC_UF894,1000_QL80_.jpg)
StarTech.com 2S1P PCI Serial Parallel Combo Card with 16550 UART - IEEE 1284 Card - Serial Parallel PCI - PCI Serial Adapter (PCI2S1P)
![Amazon.com: StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16550 UART - Expansion Card - Windows & Linux (PEX2S553) : Electronics Amazon.com: StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16550 UART - Expansion Card - Windows & Linux (PEX2S553) : Electronics](https://m.media-amazon.com/images/I/411%2B6STNcGL._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_PIStarRatingFOURANDHALF%2CBottomLeft%2C360%2C-6_SR600%2C315_ZA111%2C445%2C290%2C400%2C400%2CAmazonEmberBold%2C12%2C4%2C0%2C0%2C5_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)
Amazon.com: StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16550 UART - Expansion Card - Windows & Linux (PEX2S553) : Electronics
![Amazon.com: StarTech.com 2 Port PCI Express RS232 Serial Adapter Card with 16950 UART - PCIe Serial Card - PCI Express RS232 Card - PCIe RS232 (PEX2S950) : Electronics Amazon.com: StarTech.com 2 Port PCI Express RS232 Serial Adapter Card with 16950 UART - PCIe Serial Card - PCI Express RS232 Card - PCIe RS232 (PEX2S950) : Electronics](https://m.media-amazon.com/images/I/81HXWKYK7fL._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com 2 Port PCI Express RS232 Serial Adapter Card with 16950 UART - PCIe Serial Card - PCI Express RS232 Card - PCIe RS232 (PEX2S950) : Electronics
![Amazon.com: StarTech.com 2-Port PCI RS232 Serial Adapter Card - PCI Serial Port Expansion Controller Card - PCI to Dual Serial DB9 Card - Standard (Installed) & Low Profile Brackets - Windows/Linux (PCI2S5502) : Amazon.com: StarTech.com 2-Port PCI RS232 Serial Adapter Card - PCI Serial Port Expansion Controller Card - PCI to Dual Serial DB9 Card - Standard (Installed) & Low Profile Brackets - Windows/Linux (PCI2S5502) :](https://m.media-amazon.com/images/I/71HycRT0OlL._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com 2-Port PCI RS232 Serial Adapter Card - PCI Serial Port Expansion Controller Card - PCI to Dual Serial DB9 Card - Standard (Installed) & Low Profile Brackets - Windows/Linux (PCI2S5502) :
![Amazon.com: StarTech.com 2 Port PCI RS232 Serial Adapter Card with 16550 UART - Serial Adapter - PCI - RS-232 x 2 - PCI2S550 : Electronics Amazon.com: StarTech.com 2 Port PCI RS232 Serial Adapter Card with 16550 UART - Serial Adapter - PCI - RS-232 x 2 - PCI2S550 : Electronics](https://m.media-amazon.com/images/I/81jrl0OntUL._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com 2 Port PCI RS232 Serial Adapter Card with 16550 UART - Serial Adapter - PCI - RS-232 x 2 - PCI2S550 : Electronics
![Amazon.com: DTECH 2 Port PCI Serial Card PCI to COM Port DB9 RS232 Expansion Adapter for Desktop Computer PC Windows 10 8 7 XP Vista with 16C550 UART : Electronics Amazon.com: DTECH 2 Port PCI Serial Card PCI to COM Port DB9 RS232 Expansion Adapter for Desktop Computer PC Windows 10 8 7 XP Vista with 16C550 UART : Electronics](https://m.media-amazon.com/images/I/61EH5nPPLNL._AC_UF894,1000_QL80_.jpg)
Amazon.com: DTECH 2 Port PCI Serial Card PCI to COM Port DB9 RS232 Expansion Adapter for Desktop Computer PC Windows 10 8 7 XP Vista with 16C550 UART : Electronics
![Amazon.com: MZHOU PCI-Express PCIe Expansion Card - 1X Serial COM interfaces - COM Port RS232 Interface - Adapter Converter Card, RS-232 Module with 4 Connections, 18-pin : Electronics Amazon.com: MZHOU PCI-Express PCIe Expansion Card - 1X Serial COM interfaces - COM Port RS232 Interface - Adapter Converter Card, RS-232 Module with 4 Connections, 18-pin : Electronics](https://m.media-amazon.com/images/I/71BwzobxtrL.jpg)
Amazon.com: MZHOU PCI-Express PCIe Expansion Card - 1X Serial COM interfaces - COM Port RS232 Interface - Adapter Converter Card, RS-232 Module with 4 Connections, 18-pin : Electronics
![Amazon.com: 2 Port PCI RS232 Serial Adapter Card with 16C750 UART - PCIe X1 to (2) RS-232 Serial Card : Electronics Amazon.com: 2 Port PCI RS232 Serial Adapter Card with 16C750 UART - PCIe X1 to (2) RS-232 Serial Card : Electronics](https://m.media-amazon.com/images/I/71lenaIEJoL._AC_UF894,1000_QL80_.jpg)
Amazon.com: 2 Port PCI RS232 Serial Adapter Card with 16C750 UART - PCIe X1 to (2) RS-232 Serial Card : Electronics
![Amazon.com: StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows & Linux (PEX4S953LP) : Electronics Amazon.com: StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows & Linux (PEX4S953LP) : Electronics](https://m.media-amazon.com/images/I/81ZFhYp+ffL.jpg)
Amazon.com: StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows & Linux (PEX4S953LP) : Electronics
![Amazon.com: DTECH 2 Port PCI-E Serial Card RS232 PCI Express Adapter COM Port Expansion for Desktop Computer PC Windows 10 8 7 XP Vista Linux Mac with 16C550 UART : Electronics Amazon.com: DTECH 2 Port PCI-E Serial Card RS232 PCI Express Adapter COM Port Expansion for Desktop Computer PC Windows 10 8 7 XP Vista Linux Mac with 16C550 UART : Electronics](https://m.media-amazon.com/images/I/41N2e5kTrOL._AC_.jpg)
Amazon.com: DTECH 2 Port PCI-E Serial Card RS232 PCI Express Adapter COM Port Expansion for Desktop Computer PC Windows 10 8 7 XP Vista Linux Mac with 16C550 UART : Electronics
![Amazon.com: 1 Port PCI RS232 Serial Adapter Card with 16C750 UART - PCIe X1 to RS-232 Serial Card : Electronics Amazon.com: 1 Port PCI RS232 Serial Adapter Card with 16C750 UART - PCIe X1 to RS-232 Serial Card : Electronics](https://m.media-amazon.com/images/I/615rVEw6A-L._AC_UF894,1000_QL80_.jpg)
Amazon.com: 1 Port PCI RS232 Serial Adapter Card with 16C750 UART - PCIe X1 to RS-232 Serial Card : Electronics
![Amazon.com: IO Crest 2 Port Serial PCI-e 1.0 x 1 with Full and Low Profile Brackets SI-PEX15037 : Electronics Amazon.com: IO Crest 2 Port Serial PCI-e 1.0 x 1 with Full and Low Profile Brackets SI-PEX15037 : Electronics](https://m.media-amazon.com/images/I/71ITsh+NmjL.jpg)
Amazon.com: IO Crest 2 Port Serial PCI-e 1.0 x 1 with Full and Low Profile Brackets SI-PEX15037 : Electronics
![Amazon.com: StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux (PEX2S953) : Electronics Amazon.com: StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux (PEX2S953) : Electronics](https://m.media-amazon.com/images/I/814wTtbUiUS._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux (PEX2S953) : Electronics
![Amazon.com: 1 Port PCI RS232 Serial Adapter Card with 16C750 UART - PCIe X1 to RS-232 Serial Card : Electronics Amazon.com: 1 Port PCI RS232 Serial Adapter Card with 16C750 UART - PCIe X1 to RS-232 Serial Card : Electronics](https://m.media-amazon.com/images/I/615rVEw6A-L.jpg)