Can AOD change VIDs on your system?
I had planned to pick up the Sapphire as the next RD790 board but when you say it doesn't have VID options, that scares me.
Try this MSR: 0xC0010070
EDX = 0x00000000 (always)
EAX
0x3000400A = 1.150VID
0x3000385A = 1.200VID
0x3000375A = 1.212VID
0x3000350A = 1.225VID
0x3000300A = 1.250VID
0x3000285A = 1.300VID
0x3000275A = 1.312VID
0x3000250A = 1.325VID
0x3000200A = 1.350VID
It should change CPU VID and hence volts (check in AMD PM).

I'm not sure of all the ranges because I've not played with it more but the pattern is obvious. It's very easy to change VID and voltage this way without problems (you can include it in RWE).
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