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Directly connecting USB-C Flash Drive connector 2x faster than using USB 3.x !?

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c627627

c(n*199780) Senior Member
Joined
Feb 18, 2002
So I experimented transferring a few 1GB files to a USB-C flash drive and noticed that there was a difference when connecting USB-C directly to the
motherboard's USB-C connector vs. using standard USB 3 connections.

The speed transfer roughly doubles (!) when using USB-C...

Could there be any anomalies in my testing?

Asus Z170-A Intel Skylake chipset motherboard.
Samsung DUO PLUS 128GB flash drive.
 
OP
c627627

c627627

c(n*199780) Senior Member
Joined
Feb 18, 2002
Ha, so I just found the culprit.
THIS ORIGINAL ADAPTER:

USBFlash.jpg

I have another Samsung DUO PLUS, the 256GB version, so using the system of elimination, I tested the adapter from another drive and discovered the culprit.
Here's the explanation, Samsung made the adapter so that it can ONLY be used one way correctly. The pictured arrows have to align.
If you flip it - then you are operating at half the speed - d'oh.

I discovered this independently, but it appears other reviewers figured this out too when I tried to do a search on this problem.


I doubt 1/10 users in the world are aware of this. People are using these popular drives at half the speeds they are actually capable of.
Samsung cheapened out on this.