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Best Serial Port Cards of 2026
Best Choice
1
StarTechStarTech 4-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Host Controller - PCIe to Serial DB9-16950 UART - Low Profile Expansion Card - Windows & Linux, TAA
9.8
Exceptional
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
2
PUSRPUSR Serial RS232 RS485 to Ethernet Modbus RTU to Modbus TCP Gateway Modbus to Ethernet Converter USR-TCP232-410s
9.7
Exceptional
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
3
SxhlsellerSxhlseller 2 Port PCI Express RS232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit for Linux, PCIe Serial Expansion Card PCIe Serial Host Controller Card
9.6
Exceptional
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
4
StarTechStarTech 2-Port PCI Express RS232 Serial Adapter Card (PEX2S953)
9.5
Excellent
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Value for Money
5
StarTechStarTech 1-Port PCI Express RS232 Serial Adapter Card (PEX1S953LP)
9.2
Excellent
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
6
StarTechStarTech 2-Port PCI Express Serial Card, PCI Serial Card (PEX2S1050)
9.0
Excellent
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
7
CERRXIANCERRXIAN 2-Port RS232 PCI Express Serial Card - DB9 Dual Channel 16C1050 UART - Serial Port PCIe Card - Serial Expansion Card
8.7
Very Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
8
StarTechStarTech 2-Port PCI Express RS232 Serial Adapter Card (PEX2S953LP)
8.4
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
9
StarTechStarTech 2-Port SATA III PCIe Card, 6Gbps, NCQ (2P6G-PCIE-SATA-CARD)
8.2
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
10
StarTechStarTech 2-Port SATA III 6Gbps PCIe x1 SATA/eSATA Card, NCQ (PEXESAT322I)
32% Off
8.1
Good
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
