XFX RX 580 GTS Black Edition 8GB - need undervolt settings

[skittelsy1234]

my rx 580 gets 82c after 10 minutes of gaming without oc and still raising temps on 1500rpm i need some good undervolting settings that is stable for this card

 

[tennis2]

Can you provide the frequency of each of the 7 P States as shown in WattMan - Frequency (Dynamic)