simo241

Yes it is Asmedia chipset, i sid know this chipset cause problem, well at this point is ok , only past things why in usb in system the speed of the usb is showed only 12mb/s on ly few port is 450 mb/s and not 5 g/s like every one

Thank you very much for your reply , i already use the command described see attached but still only 13 port showed , i exclude all the one not used till SS10[/img]

I attached my ioreg copy. My USB are the one on motherborad z270 pro carbon , then there is an usb 3.0 hub and one usb 2 hub attached to the internal port of the motherboard that are going to the case nothing elese , the two 3.1 port ( one is usb C )on the back of the motherboard are not showed but when i attached an usb 3.0 is loaded on boat port simone’s iMac.zip

Onemanosx, yes i did try also with a 3.1 usb and is loaded , i can use it but is not showed in ioreg, my concern is also that i arrive at maximum ss7 even if i still reach 13 port , where are tje other port ? I just wonder if maybe are showed in eho1 section

Hi, i use -uia_exclude_hs to show all available port but maximum ss port visible are only 3 , total i reach 13 as port limit so i should have another 2 port, also my usb 3 i loaded from same usb port that is not showed in the ioreg . My motherboard is an msi pro carbon z270