I/O Port Cards

Best Deals
I/O Port Cards
1
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, TAA (PEX2S953)
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...
10
Amazon.com
2
7-Port USB 3.0 PCIe Expansion Card for Desktop PC, 5Gbps SuperSpeed Data Transfer, PCI Express to USB 3.0 Hub Card with Dedicated Channels & UASP Support, Plug & Play, Windows 11/10/8/7/XP/Vista/Linux
7-Port USB 3.0 PCIe Expansion Card for Desktop PC, 5Gbps SuperSpeed Data Transfer, PCI Express to USB 3.0 Hub Card with Dedicated Channels & UASP Support,...
10
Amazon.com
3
Sinefine 4 Ports PCI-E to USB 3.0 Expansion Card (2 USB Type-A and 2 USB Type-C Ports), Internal Converter PCI Express Expansion Card for Desktop PC Card
Sinefine 4 Ports PCI-E to USB 3.0 Expansion Card (2 USB Type-A and 2 USB Type-C Ports), Internal Converter PCI Express Expansion Card for Desktop PC Card
10
Amazon.com
4
ASUS GeForce GT 730 2GB GDDR5 Low Profile Graphics Card for Silent HTPC Builds (with I/O Port Brackets)
ASUS GeForce GT 730 2GB GDDR5 Low Profile Graphics Card for Silent HTPC Builds (with I/O Port Brackets)
8.8
Amazon.com
5
StarTech.com 5-Port USB PCIe Card, USB 3.2 10Gbps, PCI Express Card with 4X USB-C Ports, 1x USB-A Internal Port
StarTech.com 5-Port USB PCIe Card, USB 3.2 10Gbps, PCI Express Card with 4X USB-C Ports, 1x USB-A Internal Port
8.8
Amazon.com
6
PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC (Will Also Work on PCI-E x4, x8, x16 Slot)
PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC (Will Also Work on PCI-E x4,...
8.8
Amazon.com
7
New Genuine Rear I/O Port Card USB C for ThinkCentre M90s Gen 5 P340 P350 P2 P3 P360 5C50W00887
New Genuine Rear I/O Port Card USB C for ThinkCentre M90s Gen 5 P340 P350 P2 P3 P360 5C50W00887
7.9
Amazon.com
StarTech.com 5-Port USB PCIe Card, USB 3.2 10Gbps, PCI Express Card with 4X USB-C Ports, 1x USB-A Internal Port
StarTech.com 5-Port USB PCIe Card, USB 3.2 10Gbps, PCI Express Card with 4X USB-C Ports, 1x USB-A Internal Port
4.0
$81.99
$67.39
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, TAA (PEX2S953)
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...
5.0
$59.99
$46.95
Amazon.com
Sinefine 4 Ports PCI-E to USB 3.0 Expansion Card (2 USB Type-A and 2 USB Type-C Ports), Internal Converter PCI Express Expansion Card for Desktop PC Card
Sinefine 4 Ports PCI-E to USB 3.0 Expansion Card (2 USB Type-A and 2 USB Type-C Ports), Internal Converter PCI Express Expansion Card for Desktop PC Card
5.0
$16.99
$13.59
Amazon.com
ASUS GeForce GT 730 2GB GDDR5 Low Profile Graphics Card for Silent HTPC Builds (with I/O Port Brackets)
ASUS GeForce GT 730 2GB GDDR5 Low Profile Graphics Card for Silent HTPC Builds (with I/O Port Brackets)
4.0
$91.21
Amazon.com
7-Port USB 3.0 PCIe Expansion Card for Desktop PC, 5Gbps SuperSpeed Data Transfer, PCI Express to USB 3.0 Hub Card with Dedicated Channels & UASP Support, Plug & Play, Windows 11/10/8/7/XP/Vista/Linux
7-Port USB 3.0 PCIe Expansion Card for Desktop PC, 5Gbps SuperSpeed Data Transfer, PCI Express to USB 3.0 Hub Card with Dedicated Channels & UASP Support,...
5.0
$19.99
Amazon.com
New Genuine Rear I/O Port Card USB C for ThinkCentre M90s Gen 5 P340 P350 P2 P3 P360 5C50W00887
New Genuine Rear I/O Port Card USB C for ThinkCentre M90s Gen 5 P340 P350 P2 P3 P360 5C50W00887
Amazon.com
PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC (Will Also Work on PCI-E x4, x8, x16 Slot)
PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC (Will Also Work on PCI-E x4,...
4.0
$13.99
Amazon.com
Amazon price updated: November 30, 2025 11:45 am
Sinefine 4 Ports PCI-E to USB 3.0 Expansion Card (2 USB Type-A and 2 USB Type-C Ports), Internal Converter PCI Express Expansion Card for Desktop PC Card
Sinefine 4 Ports PCI-E to USB 3.0 Expansion Card (2 USB Type-A and 2 USB Type-C Ports), Internal Converter PCI Express Expansion Card for Desktop PC Card
5.0
$16.99
$13.59
Amazon.com
PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC (Will Also Work on PCI-E x4, x8, x16 Slot)
PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC (Will Also Work on PCI-E x4,...
4.0
$13.99
Amazon.com
7-Port USB 3.0 PCIe Expansion Card for Desktop PC, 5Gbps SuperSpeed Data Transfer, PCI Express to USB 3.0 Hub Card with Dedicated Channels & UASP Support, Plug & Play, Windows 11/10/8/7/XP/Vista/Linux
7-Port USB 3.0 PCIe Expansion Card for Desktop PC, 5Gbps SuperSpeed Data Transfer, PCI Express to USB 3.0 Hub Card with Dedicated Channels & UASP Support,...
5.0
$19.99
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, TAA (PEX2S953)
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...
5.0
$59.99
$46.95
Amazon.com
StarTech.com 5-Port USB PCIe Card, USB 3.2 10Gbps, PCI Express Card with 4X USB-C Ports, 1x USB-A Internal Port
StarTech.com 5-Port USB PCIe Card, USB 3.2 10Gbps, PCI Express Card with 4X USB-C Ports, 1x USB-A Internal Port
4.0
$81.99
$67.39
Amazon.com
ASUS GeForce GT 730 2GB GDDR5 Low Profile Graphics Card for Silent HTPC Builds (with I/O Port Brackets)
ASUS GeForce GT 730 2GB GDDR5 Low Profile Graphics Card for Silent HTPC Builds (with I/O Port Brackets)
4.0
$91.21
Amazon.com
New Genuine Rear I/O Port Card USB C for ThinkCentre M90s Gen 5 P340 P350 P2 P3 P360 5C50W00887
New Genuine Rear I/O Port Card USB C for ThinkCentre M90s Gen 5 P340 P350 P2 P3 P360 5C50W00887
Amazon.com
Amazon price updated: November 30, 2025 11:45 am

More information about I/O Port Cards

Expand your computer's connectivity options with I/O Port Cards. These handy devices allow you to easily add extra ports to your computer, giving you more flexibility and convenience. Whether you need additional USB ports, serial ports, parallel ports, or even audio ports, I/O Port Cards have got you covered. Quickly upgrade your computer today.

Questions about I/O Port Cards

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