HBP Posted September 30, 2018 Share Posted September 30, 2018 Ok, so the story goes, I upgraded from a z77x board to a Z270 which has USB 2.0, 3.0 and 3.1. When I use a usb 3.1 to usb adaptor cable and plug into the the usb 3.0/3.1 port I get usb 3.1 speeds. When I plug it into the usb 3.1 port (the new mini interface) I only get 480 Mb/sec. What am I doing wrong? Send me 1 is the usb converter cable, Send me 2 is the USB 3.1 cable. I am trying to identify what is changing when I use the conversion cable too connect I get 5g/s speed vs 480m/s. so how does the cable make the connection different? trying to understand. HBP Send me 1.zip Send me 2.zip Link to comment https://www.insanelymac.com/forum/topic/335723-what-gives-with-usb-31/ Share on other sites More sharing options...
STLVNUB Posted September 30, 2018 Share Posted September 30, 2018 Sounds like ports aren't configured properly I had to make a SSdt with my ports (10 2.0/8 3.0) to get them to work at 2.0/3.0 speeds. I don't use a port limit patch, but have USBInjectall.kext and XHCI-300-series-injector.kext COFFEELAKE-USB-SSDT.aml Link to comment https://www.insanelymac.com/forum/topic/335723-what-gives-with-usb-31/#findComment-2637770 Share on other sites More sharing options...
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