Simplecom EC318 PCI-e x4 to USB 3.2 Gen2x2 20Gbps USB-C Expansion Card


Availability : In Stock



EC318 is a PCI Express to SuperSpeed USB 20Gbps expansion card that features USB 3.2 Gen2x2 USB-C interface. This expansion card supports a data transfer rate up to 20Gbps and provides enough bandwidth for fast portable SSD storage devices.

Designed for PCI-e 3.0 and above version, this PCI-e card is applicable to most PCs with PCI-e interface (PCI-e x4 x8 or x16) on the motherboard. It works up to 20Gbps for data transfer when connecting to USB 3.2 Gen2x2 compliant peripherals, while maintaining compatibility with existing USB peripheral devices.

EC318 is also backward compatible with the previous USB version and supports UASP (USB Attached SCSI Protocol) for enhanced performance. This card is an ideal choice for external storage devices, HD webcams, video capture devices, and more. The card draws power from the PCI-e slot on the host computer with a SATA power connector for additional power.


  • Expands your desktop PC to one USB-C 3.2 Gen 2x2 port
  • SuperSpeed USB 20Gbps
  • PCI Express 3.0 x4 lanes (also works on x8 or x16 lanes)
  • Compliant with PCI Express Specification 3.0
  • Compliant with USB 3.2 Specification Rev. 1.0, Intel xHCI Specification 1.2
  • Compliant with USB Attached SCSI Protocol (UASP) Specification 1.0
  • LED indicator for power and connection status
  • Includes low profile slot cover for supporting low profile cases
  • Plug and play, no driver required


  • Bus: PCI Express 3.0 x4 lanes
  • Interface: 1x USB-C (USB 3.2 Gen2x2)
  • Controller: ASM3242 and ASM1541 USB 3.2 Gen 2x2 controllers
  • Speed Support: SuperSpeed USB 20Gbps/10Gbps/5Gbps, HiSpeed USB 480Mbps
  • Power Source: Powered by PCI-e slot, SATA Power Connector for additional power
  • USB Power Output: 5V3A max
  • Supported System: Windows 8 and above


1x USB 3.2 Gen 2x2 1-Port PCIe x4 Card
1x low profile bracket
Important Note

EC318 does not support DP Alt Mode or USB Power Delivery.
Windows 7 is not supported.
EC318 is designed for PCI-e 3.0 interface. 


Our hardware comes with a 1-year warranty and we will be glad to provide a replacement/refund if the device is deemed faulty.

  • We accept return of an item within 7 business days from delivery. To be eligible for this, returned item must be unused and in the same condition as you receive it. Ensure it is returned in its original packaging. Processing of refund will be attended to after item has been received. This may take 5-10 business days depending on your location. 

  • All items purchased will have 12-month hardware warranty.  

  • All items that will be returned will have a Restocking Fee of 10% depending on the item condition. 
  • If you encounter any problem with the item, contact our support hotline right away to assist you of your concern.  

  • For defective items, our warehouse team will be the one to validate whether the item is indeed defective. 
  • We offer warranty repair. Warranty varies depending on the product indicated on the advertisement. Please pay attention as warranty can be 12-months, 36-months and 60-months. If the item cannot be repaired and is within warranty period, we will offer item replacement provided item is still available. 
  • All shipping costs to and from our warehouse will be shouldered by AVH direct.