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Best Serial Port Cards of 2026
Best Choice
1
StarTechStarTech 2-Port PCI Express Serial Card, PCI Serial Card (PEX2S1050) | RS232 Low Profile Serial Card, With 16C1050 UART
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.
2
StarTechStarTech 1-Port PCI Express Serial Card (11050-PC-SERIAL-CARD) | PCIe to RS232 (DB9) Serial Interface Card, 16C1050 UART, COM Retention, Windows/Linux, Standard/Low Profile Brackets
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.
Value for Money
3
StarTechStarTech 1-Port PCI Express RS232 Serial Adapter Card (PEX1S953LP) | PCIe RS232 Serial DB9 Host Controller Card, 16950 UART, Low Profile Expansion Card for Windows and Linux
33% Off Limited Time Deal 00:00:00
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.
4
CERRXIANCERRXIAN 2-Port RS232 PCI Express Serial Card - DB9 Dual Channel 16C1050 UART - Serial Port PCIe Card - Serial Expansion Card
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.
5
StarTechStarTech 2-Port PCI Express RS232 Serial Adapter Card (PEX2S953LP) | PCIe RS232 Serial Host Controller Card, PCIe to Serial DB9, 16950 UART, Windows & Linux, Low Profile Expansion Card
9.1
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
CERRXIANCERRXIAN M.2 M&B KEY to 4 x RS232 Serial Adapter Card ,M.2 to DB9 Expansion Card ,4 Port Serial DB9 RS-232 M2 2280 Controller Cardfor Desktop PC
8.8
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.
7
StarTechStarTech 2-Port PCI Express RS232 Serial Adapter Card (PEX2S953) | PCIe RS232 Serial Host Controller Card, PCIe to Dual Serial DB9 Card, 16950 UART, Windows & Linux, 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 SATA III PCIe Card, 6Gbps, NCQ (2P6G-PCIE-SATA-CARD) | PCI Express to SATA adapter/controller/converter, X1 slot, Full/low-profile brackets, Port Multiplier, HDD/SSD
8.6
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.
9
PUSRPUSR USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (2)
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.
10
ATENATEN USB To RS-232 Serial Converter Adaptor 1M Cable UC232A1, up to 921.6 Kbps, OS Compatibility Windows, Mac, Linux, (Android 3.2 and above) for laptop and desktop computers, #1 KVM Market Leader
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.
