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:
AJ762B HP 81E 8Gb 1-port PCIe Fibre Channel Host Bus Adapter 697889-001
Quick View
Linkreal 1 Port SFF-8643 to PCIe x16 Slot Adapter
Quick View
Linkreal 1 Port SFF-8643 to PCIe x16 Slot Adapter
  • Type: Controller Card
  • Model #: LRFC6911N
  •  
  • $26.00 
  • $10.00 Shipping
Linkreal PCIe x4 to 2 Port SFF-8643 Slot Adapter Card
Quick View
Linkreal PCIe x4 to 2 Port SFF-8643 Slot Adapter Card
  • Type: Controller Card
  • Model #: LRFC6921N
  •  
  • $33.00 
  • $10.00 Shipping
VANTEC UGT-M2PC200 M.2 NVMe + M.2 SATA SSD PCIe X4 Adapter
Quick View
VANTEC UGT-M2PC200 M.2 NVMe + M.2 SATA SSD PCIe X4 Adapter
  • Type: PCIe to M.2
  • Internal Ports: 2 x M.2 (NGFF) PCIe v3.0 or PCIe v2.0 x4 (4 lanes)
  • Operating Systems Supported: Windows 7/8/8.1/10, or Linux
  • Specifications: Primary M.2 Type: NVMe or AHCI SSD using M Key only Secondary M.2 Type: SATA SSD using B Key M.2 size: Length support 22x42mm, 22x60mm or 22x80mm Internal Interface: 2 x M.2 (NGFF) PCIe Interface: PCIe v3.0 or PCIe v2.0 x4 (4 lanes) Power: PCIe Bus powered (3.3V)
  • Model #: UGT-M2PC200
Hpe 817753-B21 ETHERNET 10/25Gb 2-Port 640SFP28 Adapter Network Card
Quick View
  •  
  • $218.25 
  • Free Shipping
Linkreal PCI Express x16 to 8 U.2 SFF-8643 NVMe SSD Adapter Card
Quick View
Linkreal PCI Express x16 to 8 U.2 SFF-8643 NVMe SSD Adapter Card
  • Type: Controller Card
  • Internal Ports: 8 Port SFF-8643
  • Standard: PCI Express x16 to 8 U.2 SFF-8643 NVMe SSD Adapter Card
  • Data Transfer Rate: 6.0 Gbps
  • Model #: LRNV9348-8I
  •  
  • $149.00 
  • $10.00 Shipping
Linkreal PCI Express 3.0 x8 to 4 xM.2 NVMe SSD Adapter with Heatsink and Fan Cooling System
Quick View
Linkreal PCI Express 3.0 x8 to 4 xM.2 NVMe SSD Adapter with Heatsink and Fan Cooling System
  • Type: PCI Express to M.2 Card
  • External Ports: 4 x Serial Ports
  • Internal Ports: 4*M.2
  • Standard: PCI Express to M.2 NVMe SSD Expansion Card
  • Model #: LRNV9524-4I
  •  
  • $188.00 
  • $10.00 Shipping
Jimier SD SDHC SDXC to High-Speed Extreme Compact Flash CF Type I Adapter For 16/32/64/128 GB EP-078
Quick View
  •  
  • $15.57 
  • Free Shipping
  • $12.46 - $15.57
Jimier PCI-E Express 16X to 16x Male to Female Riser Extender Card Ribbon Cable 20cm EP-075
Quick View
HP IEEE 1394b FireWire Interface Card PCIe x1 LP HP HI348 491886-002 632487-001
Quick View
  •  
  • $29.99 
  • $11.00 Shipping
M.2 (NGFF)  key A/E/A+E to Mini PCI-E  Adapter with FFC Cable
Quick View
M.2 (NGFF) key A/E/A+E to Mini PCI-E Adapter with FFC Cable
  • Type: Mini PCI Express to Mini PCI Express
  • Model #: 1045
  •  
  • $18.68 
  • $1.99 Shipping
NGFF(M.2)  B-key  SATA-Bus SSD to SATA3 Adapter by DDR memory slot installation
Quick View
  •  
  • $15.88 
  • $1.99 Shipping
NGFF(M.2)  nvme M key SSD to PCI- E 1X Adapter(vertical installation)
Quick View
  •  
  • $9.88 
  • $1.99 Shipping
2 in 1 Combine M.2 NGFF key B & mSATA SSD To USB 2.0 Adapter
Quick View
  •  
  • $16.68 
  • $1.99 Shipping
Lenovo Riser Card 4XH7A09843
Quick View
Lenovo
Lenovo Riser Card 4XH7A09843
  • Model #: 4XH7A09843
GIGABYTE GC-MAPLE RIDGE Thunderbolt 4 PCI-Ex4 add on Card USB Type-C DisplayPort
Quick View
GIGABYTE GC-MAPLE RIDGE Thunderbolt 4 PCI-Ex4 add on Card USB Type-C DisplayPort
  • Type: PCI Express to Thunderbolt
  • Model #: B-GIGABYTE GC-MAPLE RIDGE
SYBA USB 3.0 4-port PCI-Express x1 Controller Card, VLI VL80x Chip Model SD-PEX20133
Quick View
SYBA USB 3.0 4-port PCI-Express x1 Controller Card, VLI VL80x Chip Model SD-PEX20133
  • Type: PCI Express to USB Card
  • External USB Ports: 4x USB Ports
  • Standard: USB 3.0
  • Data Transfer Rate: Up to 5.0 Gbps
  • Model #: SD-PEX20133
VANTEC UGT-M2PC130 M.2 NVMe PCIe x4 Low Profile Adapter With 110 Length Support
Quick View
VANTEC UGT-M2PC130 M.2 NVMe PCIe x4 Low Profile Adapter With 110 Length Support
  • Type: PCI Express to M.2 Card
  • External Ports: 1 x M.2 (NGFF), M Key
  • Internal Ports: 1 x PCIe x4 Slot
  • Operating Systems Supported: Windows 7/8/8.1/10, or Linux
  • Model #: UGT-M2PC130
SYBA PCI to Serial 2-port host controller card Model SD-PCI-2S
Quick View
SYBA PCI to Serial 2-port host controller card Model SD-PCI-2S

Limited time offer, ends 08/29

  • Type: PCI to Serial Port Card
  • External Ports: 2x DB9 serial port connectors
  • Operating Systems Supported: Windows 98SE/ME/2000/XP/NT4.0, Linux & DOS Operating System
  • Weight: 0.4
  • Model #: SD-PCI-2S

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