Usb 3.0 vs 3.1 gen 1 speed

I thought they were both the same.

Bought an usb 3.0 cable to connect a ssd.
Best speed I could get was 28/30MB/s.

Bought an usb 3.1 cable and speed went over 300MB/s.

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Is it plugged all the way in?

There can be different factors in play here. When you say USB 3.1 do you mean the Type-C connector?

What end are your connecting to your computer? The Type-A [rectangular] connector has two rows of four pins, if you don't put in fully into the port, only the front four pins will be connected and the cable will act like a USB 2.0 cable. USB 3.1 (Type-C) clicks all the way or it won't work at all.

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All the way in

Both cables use type-a to connect to the pc.

The other end of the cables have a 2.5 connector for the ssd.

I can not push the slow cable any further into the pc as it seems to be bottomed out and firmly seated.

The way the type-a is made is it has a metal portion which goes into the usb port and then a plastic portion.

If you insert it until the plastic portion is butted against the pc that's as far as it's going to go.

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Just curious

You changed to a new 3.1 cable and everything works fine now ?
The 3.1 was plugged into the same port that didn't work with the 3.0 ? Confused

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(NT) Yes
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The 3.0 cable is old and beginning to fail ?

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Whatever the reason

The 3.0 cable is quite slow.

I just trashed the thing and moved on to a 3.1 cable.

I'm making a guess that 300MB/s is ok for usb3.

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