USB3 with CentOS7 on R730

Hi,

I am trying to use USB3 with CentOS7 on an R730.
USB3 is enabled in BIOS.

lspci shows :
00:14.0 USB controller: Intel Corporation C610/X99 series chipset USB 
xHCI Host Controller (rev 05)
00:1a.0 USB controller: Intel Corporation C610/X99 series chipset USB 
Enhanced Host Controller #2 (rev 05)
00:1d.0 USB controller: Intel Corporation C610/X99 series chipset USB 
Enhanced Host Controller #1 (rev 05)

Speed test gives only 13MB/s:
dd count=500 bs=1M if=/dev/urandom of=/mnt/usbdisk/test

524288000 Bytes (524 MB) kopiert, 37,9013 s, 13,8 MB/s


Any experiences with this?

Thanks in advance!

Kind regards,
Nicole

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