StarTech.com 4 Port PCI Express RS232 Serial Adapter Card
Single-Lane PCI Express, Breakout Cable, RS232 Extension, PCIe Serial Card (PEX4S553B)
PCI-e Serial Card
StarTech.com 4 Port PCI Express PCIe Serial Combo Card with Breakout Cable
2 x RS232 2 x RS422 / RS485, Dual Profile (PEX4S232485)
The included breakout cable saves expense as an all-in-one solution, and allows the addition of multiple serial ports through a single PCI Express slot
StarTech.com 1 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART (PEX1S553LP)
StarTech.com 2-Port PCI Express Serial Card with 16C1050 UART
RS232 Low Profile Serial Card, PCI Serial Card (PEX2S1050)
SIMPLE INSTALLATION: The PCI dual serial adapter features IRQ sharing and supports plug-and-play connection. It has a standard-profile bracket installed, and an optional low-profile bracket.
StarTech.com 2 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART
PCIe RS232, PCI-E Serial Card (PEX2S553LP)
SIIG Legacy and Beyond Series 2 Port (Dual) Serial
RS-232 PCIe Card with 16C550 UART
Chipset: ASIX/MosChip MCS9900CV-AA
Manhattan Products 152082 Manhattan Serial PCI Express Card Quickly and Easily Adds Two DB9 Ports to PCI E
ELIATER PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 RS232 COM Port Adapter WCH382 Chip for Desktop PC Windows 10 with Low Bracket
This card capability allow for upgrade with additional serial cards to your computer easily.
SIIG Dual (2) Serial Port/RS-232 and Single (1) Parallel Port PCIe Card Compatible with 16C550 UART (JJ-E20411-S1)
Easily adds two serial port and one parallel port through an available PCI Express slot. 16C650 UART serial port with data transfer rate up to 250Kbps. Compliant with PCI Express 2.0 Gen 1. Compatible with IEEE 1284 -1994 parallel port standard for SPP/Byte/ECP Mode.
ELIATER PCIe Combo Serial Parallel Expansion Card PCI Express to Printer LPT Port RS232 Com Port Adapter IEEE 1284 Controller Card WCH382 Chip for Desktop PC Windows 10 with Low Bracket
This card capability allow for upgrade with additional serial or parallel cards to your computer easily.