(Paul) wrote in
:

[Hardrives slow and beeping]

And, if you examine the Hardware Monitor page in the BIOS, how
are your power supply voltages ? It could be that +5V is low,
and that is upsetting the drives. In the Asus group, we get more
power supply failures, than motherboard failures, so check that
first. ATX power supplies tend to regulate to +/- 5%, so the 5V
is only allowed to drop to 4.75V or go as high as 5.25V. If the
power supply is off by 10%, i.e. 4.5V, the disk drive controller
may have a problem with that.

If the power looks good, then go back to blaming the motherboard.
RMA if there is any warranty left.

The voltages are a bit out, but the 5V seems fine:

12V 12.128
5V 4.977
3.3V 3.072
VCore 1.825 (the BIOS is trying to get 1.75V here)

Could the 3.3V be at fault?