Best Serial Port Cards

SATA Card 8 Port, PCI-E to SATA 3.0 Controller Expansion Board with Low Profile Bracket, SATA3.0 Interface Expansion Card for Windows 7/8/XP/10

LinksTek 2-Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE RS232 Card, PCIE Serial DB9 Port Card (PCIE-SE2)

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)

StarTech.com PEX2S553 2 Port Native PCi Express Rs232 Serial Adapter Card with 16550 Uart Pex2S553 (Green)

StarTech.com 1-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 (PEX1S953LP)

ELIATER 2-Port PCIe Serial Expansion Card with Industrial DB9 RS232 COM Ports, 16C550 UART WCH382 Chip for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, Low Bracket Included

axGear Serial PCI-E Controller Card DB9 Com Port PCI Express Adapter 2 Ports RS-232 DB9

Deal4GO SD2SP2 Micro SD Card Adapter 1.2A SDLoader Mod for Nintendo Gamecube NGC Serial Port 2 MicroSD Card Adapter (3rd Party)

8 Port Serial DB9 RS-232 PCI Controller Card RDC C6238 Chipset

StarTech.com 2-Port PCI Express Serial Interface Card, Dual Port PCIe to RS232 (DB9) Serial Card, 16C1050 UART, Standard/Low Profile Brackets, COM Retention, for Windows/Linux (21050-PC-SERIAL-CARD)