Skip to main content
  • In Stock
  • Sold by Newegg
  • Make an Offer
  • New
Brands
Show More
Price
Show More
Type
Show More
External USB Ports
Show More
Thunderbolt 3
External 1394 Ports
Sold by
All Top Brands
Availability
Condition
Current Promotion
Discount
Useful Links
Customer Ratings
  • Featured Brands

    See Deals from Rosewill
Sort By:
View:
Socobeta PCIe to USB 3.2 Gen 2 Card HighSpeed 10Gbps 5 Ports Expansion Card for Desktop Black
Quick View
  •  
  • $122.99 
  • Free Shipping
PCI Serial DB9 RS232 Adapter 8 ports Serial DB9 RS232 to PCI Adapter RS-232 expansion Converter Card chip Systembase
Quick View
GLOTRENDS 200mm PCIe 4.0 X4 Riser Cable for M.2, WiFi, Firewire, USB, Sound Cards, etc
Quick View
  •  
  • $45.99 
  • $5.99 Shipping
Aomoproing 1Piece 14 Pin TPM 2.0 Module For Intel Trusted Platform Module
Quick View
  •  
  • $37.89 
  • Free Shipping
Low Profile 4 Ports PCI-E to USB 3.0 HUB PCI Express Expansion Card Adapter 5Gbps for Motherboard
Quick View
  •  
  • $22.78 
  • Free Shipping
Intel® Ethernet Converged Network Adapter X520-DA2
Quick View
Intel
Intel® Ethernet Converged Network Adapter X520-DA2
  • Brand: Intel
  • Series: X520-DA2
  • Model: X520-DA2
  • Type: Ethernet Adapter
  • Model #: 440-808088000303225
  •  
  • $63.99 
  • Free Shipping
PCIe x1 SATA Expansion Card, 8-Port SAS/SATA 6Gb/s, UEFI Support
Quick View
  •  
  • $142.99 
  • Free Shipping
OIAGLH 6N9RH 80G5N JV6C8 PHR9G 06N9RH 080G5N 0JV6C8 0PHR9G for Ultra SSD M.2 PCIe X4 Solid State Storage Adapter Card Server
Quick View
  •  
  • $137.99 
  • Free Shipping
eShinreal 4-Port SFF-8087/8088 SAS/SATA Expansion Card (SAS2X36 Chipset)
Quick View
SUNIX 4-port RS-232 Universal PCI Serial Board Model SER5056A+L
Quick View
SUNIX 4-port RS-232 Universal PCI Serial Board Model SER5056A+L

Limited time offer, ends 08/15

  • Type: PCI to Serial Port Card
  • Specifications: Serial Communication -Interface; RS-232 -Controller: SUNIX SUN1999 (16C950 UART Compatible) -Bus: Universal PCI 64/32bit 3.3V/5V PCI Ver 3.0, 2.3, 2.2, 2.1 -No. of Port: 4-port -IRQ & IO: Assigned by System -FIFO: 128 byte (Hardware) -Signal: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND, RI -Baud rate: 50 bps to 115.2 Kbps -Data bit: 5,6,7,8 -Stop bit: 1,1.5,2 -Parity: None, Even, Odd, Space, Mark -Flow Control: None, Xon/Xoff, RTS/CTS -Protection: +/-2KV ESD protection for each signal Human Body Model (HBM) -PCB connector: DB44 Female Driver Support -Windows Client: XP/Vista/7/8/8.1 (X86/X64) -Windows Server: 2000 / 2003 / 2008 / 2008 R2 / 2012 / 2012 R2 (X86/X64) -Windows Embedded: Windows CE 4.2/5.0/6.0 XP Embedded / POSReady 2009 / POSReady 7 / Embedded System -Linux: Linux 2.4.x / 2.6.x / 3.x ...
  • Model #: SER5056A+L
  •  
  • $221.99 
  • Free Shipping
Intel® Ethernet Converged Network Adapter X520-SR2
Quick View
  •  
  • $44.99 
  • Free Shipping
eShinreal 12Gb/s PCIe x8 to 24 Port SAS SATA HBA Controller Card-SAS 3224
Quick View
Vszerda PCI-E PCIe Express 1X Riser Extension Card Angled
Quick View
Vszerda PCI-E PCIe Express 1X Riser Extension Card Angled

Limited time offer, ends 08/29

  • Model #: ST8022R1
  •  
  • $17.99 
  • Free Shipping
CREST SI-PEX40071 SATA III 8 Port Controller Card PCE-e 2.0 x2 with Low Profile Bracket
Quick View
  •  
  • $99.79 
  • Free Shipping
TPM 2.0 Module, 10Pin SPI TPM 2.0 Module, Interface Vertical Stable High Safety 9670 Chipset 10Pin SPI Module for SuperMicro AOM TPM 9670V S
Quick View
  •  
  • $37.84 
  • Free Shipping

Giving a computer additional capabilities requires fitting the computer with an add-on card, also called an expansion card, interface card or just plain card. Expansion controller cards have sockets that connect to conductors carrying data within the system. The connector you use depends on the card and computer. Cards provide communications interfaces, extra memory, video sound I/O capabilities, system interfaces for discs or tape backup devices and additional processors in general. Controller cards are an excellent example of an add-on card because the card acts as an interface for the motherboard, and other computer components like HDD, optical drives and keyboards. Add-on cards are suitable for use with printers and other devices in office environments.

Add-on Cards Improve Audio for Gaming, Movies and Music

Having a computer with a dynamite sound card or audio system makes gaming, watching movies and listening to music a lot more enjoyable and immersive. The sound card is an add-on card that facilitates each audio component, including multimedia applications such as music composition, presentations, audio editing and entertainment. Most PCs offer a standard sound experience, and improving the audio quality is simple with sound card accessories. Some standard accessories in the collection are USB audio interfaces, high-performance headphone amplifiers and virtual 7.1 channel surround sound systems. You can also add parallel printer cards to increase or upgrade the system.

PC Game Controllers Raise the Full Immersion Experience

Kicking your gaming to a whole new level of experience necessitates selecting a PC game controller that mirrors the gear handled in real-life situations. Some players feel comfortable using straightforward game controllers, like racing wheels or flight joysticks. Those who want the ultimate experience with full immersion in their favorite game need to consider empowering their system's performance. With the introduction of more elaborate controllers, such as VR headsets, rudder pedals, pro racing wheel stands and flight simulation, the upside is the new controllers require no new add-on cards. Plug the game controller USB cable into your system and Windows® 10 will detect it, and you are set up. Being immersed in your gaming scenario means using suitable PC game controllers. The performance will leave you feeling like you just flew a plane or raced a car like a professional, without leaving your house. As you track your statistics and see how much your game scores improve, empowering your system with quality PC controllers will prove worthwhile.

VR Accessories Possibilities Are Endless

Distinguishing the many uses of Virtual Reality (VR) accessories goes beyond gaming. Many fields in the educational and business community utilize VR accessories for vocational training, engineering and designing. The accessories begin with headsets, cables, connectors, 3D glasses, Bluetooth® remote controls and carrying cases. Some accessories come as a bundle, so you have gear and hardware upgrades like controller cards. Once the equipment is in place, you can begin gaming, training or virtual conceptualizing with high efficiency. The possibilities for you to produce and discover using the VR equipment and software are endless.

Bestselling Add-On Cards Reviews:

michael p.
7/3/2026 9:46:15 PM
Works great.

“ For those who don't know, you can put any size PCIE addon card from x1 to x16 into a PCIE x16 slot and it will work just fine. ”

EN-Labs USB C Motherboard Header PCIe Card, USB 3.2 20Pin Internal Connector PCI Express Card for Front Panel, USB 10Gbps Type-E A-Key & USB 2.0 Type-A Female Expansion Card with Full-Profile Bracket
Matthew W.
6/10/2023 7:37:42 AM
Easy way to add fast storage to Dell Precision Workstation

“ Better construction and heat distribution then the more expensive Dell add on card. ”

ASUS Hyper M.2 x16 PCIe 3.0 x4 Expansion Card V2 supports 4 NVMe M.2 (2242/2260/2280/22110) up to 128 Gbps for Intel VROC and AMD Ryzen Threadripper NVMe RAID