My Windows 10 Polaris Rig won't undervolt

- I tried the claymore command line -cvdcc
- I tried OverdriveNTool 0.2.5
- I tried MSI Afterburner v 4.5.0 (the vcore is greyed)

I attached a sample picture of my RX 480 Card. The Vcore should be 825 but it's 918 ( GPU-Z and HW Info show the same high vcore)

https://lh6.googleusercontent.com/29EAj2ZhK7LyRDH-foxk-NMghrdo2ke2Nnygf4iS3P8fBVHnYLCk8zg5qmRzvyJZucNPY61Z_Mkf9o7Sdc1J=w2560-h1330-rw

How can I fix this problem?