Confused about internal USB

[Yodaking8549]

So I’ve recently bought all the parts of a new gaming rig (parts list: https://de.pcpartpicker.com/user/Yodaking8549/saved/#view=WghTmG)

and PCPartpicker says I need two internal adapters: 

USB 3.2 Gen2 to USB 3.2 Gen 1 and

USB 3.2 Gen1 to USB 2.0

(btw the case is the one with the slower ports)

I am very confused and didn’t really find anything regarding this topic online. My questions are do I need these adapters or are the internal connectors downwards compatible and if I do need these adapters where can I purchase them?

Thanks in advance

[mMontana]

Look for your case manual. From that, you'll understand how many ports (and possible... headers) you can use from your mainboard.

Then you have a decision.

Kept unused the internal USB headers, if the case provided are not enough

or

Buy one (or more) bracket with USB ports and headers to connect to mainboard.

[Alex Atkin UK]

38 minutes ago, Yodaking8549 said:

So I’ve recently bought all the parts of a new gaming rig (parts list: https://de.pcpartpicker.com/user/Yodaking8549/saved/#view=WghTmG)

and PCPartpicker says I need two internal adapters: 

USB 3.2 Gen2 to USB 3.2 Gen 1 and

USB 3.2 Gen1 to USB 2.0

(btw the case is the one with the slower ports)

I am very confused and didn’t really find anything regarding this topic online. My questions are do I need these adapters or are the internal connectors downwards compatible and if I do need these adapters where can I purchase them?

Thanks in advance

I had this too.  Basically the motherboard connectors for USB 2.0, USB 3.2 Gen1/2 and USB-C (likely what they are referring to as USB 3.2 Gen2 but technically wrong) are different.

 

Like you surmised, as each one just adds more pins for newer functions, they are backwards compatible with adapters.

 

For example on my case I have two USB 3.2 Gen1 ports hooked up to a USB 2.0 header with an adapter.  The other two are just connected normally and as it has a USB-C that is connected normally too.

 

However if it didn't have USB-C then I could use an adapter to connect the USB 3.2 Gen1 ports (which AFAIK aren't really a thing, Gen1 and Gen2 are the same number of pins) to the USB-C header.

 

Its only USB-3.2 Gen2x2 where you would lose a USB lane (extra pins on the USB-C port) so it would only work in 10Gbit mode. [can someone confirm this is correct?  I'm not 100% on this part!]

[Yodaking8549]

But if the connector fits, am I able to just plug it or is there a risk of me frying the motherboard 

[mMontana]

The risk of frying the motherboard... is there. Most of the headers are pre-pinned, so it's really less likely to happen.

10 pin for dual USB 2.0 ports

20 pin for dual USB 3.0 type A ports

20 pin compact for USB type C 3.2 2x2 port

 

However... do not rush. Take your time and double check. Better done with PC of and PSU switched off.