File transfer speed comparison: USB3.1 Gen2 Type-C and USB3.1 Gen2 Type-A

I've got USB3.1 Gen2 Type-C to Type-A adapter Sanwa supply AD-USB29CFA (Fig.1).

Fig.1: AD-USB29CFA.

Attach it to USB 3.1 Gen2 Type-C storage device and tested CrystalDiskMark.

Computer:
AMD Threadripper 2990WX
Asus Zenith Extreme, Firmware 1601

USB Mass Storage Device:
ENCU3NV-JO1 M.2 to USB3.1 Gen2 Type-C converter.
Samsung 970 Pro 512GB M.2 NVMe SSD inside.


NTFS formatted, NTFS Allocation unit size=64KB.

Fig.2:  ENCU3NV-JO1 M.2 to USB3.1 Gen2 Type-C converter.

Motherboard backpanel USB3.1Gen2 ports are used to connect USB mass storage device (Fig.3).

Fig.3:  USB ports used. SS10 marked, magenta colored. Upper port is Type-A and lower port is Type-C. Both USB 3.1 Gen2 (SuperSpeed+ 10Gbps) ports.

Fig.4: WWShowUsbDeviceTree shows USB storage connected to Type-C port as "TypeC". magenta line means this device is linked at SuperSpeed+.














Fig.5: WWShowUsbDeviceTree shows "TypeA" on USB storage connected to Type-A port using AD-USB29CFA. magenta line means this device is linked at SuperSpeed+.

CrystalDiskMark Results

Fig.6: CrystalDiskMark result of Type-C port.

Fig.7: CrystalDiskMark result of Type-A port.

Fig.8: Comparison graph.

 

Conclusion

There is no significant speed difference between Type-C USB3.1Gen2 port and Type-A USB3.1Gen2 port. Both works at SuperSpeed+ speed.

It is confirmed that AD-USB29CFA is USB3.1Gen2 SuperSpeed+ capable adapter. It is Recommended.