ASROCK C216 WS User Manual page 55

®
We recommend to use Intel C216 SATA ports (SATA3_0,
SATA3_1, SATA2_2, SATA2_3, SATA2_4 and SATA2_5) for
your bootable devices. This will minimum your boot time and
get the best performance. But if you still want to boot from
ASMedia SATA3 controller, you can still enable this in UEFI.
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