For Prime Z790-A WIFI and motherboard models with 2 x PCIe GEN4 x4 slots, please make sure to place USB4 PCIE GEN4 CARD on the bottom slot for best performance.

Chipset
asmedia^® USB4^® ASM4242 Controller
External Connectors
2 x USB Type-C^® ports (Support USB4^® technology)
- Up to USB 40Gbps for USB4^® devices
- The Type-C_1 and Type-C_2 supports up to 20V/3A, 60W quick charge feature
2 x DisplayPort IN ports
1 x 6-pin PCIe power connector for quick charge function
1 x USB 2.0 header
1 x USB4  header
Interface
PCIe 4.0 x4 interface
VGA
Supports max. 8K@60Hz as specified in DisplayPort 1.4*
* Max resolution support will depend on your VGA source
Accessory
2 x DisplayPort cables (links graphics output from motherboard’s or discrete graphics card’s DisplayPort to the DisplayPort IN port on the USB4 PCIE GEN4 CARD)
1 x USB 2.0 cable
1 x 14-1 pin USB4 header cable
1 x User manual
Compatible Models
Support list under the Support tab of product information site or visit https://www.asus.com/support/
Operating System
Windows^® 11, Windows^® 10 64-bit

3.5 inch x 4.7 inch (8.89 cm*11.95 cm)