XFX 470 8 GB Hyinx

[Dobreval]

Hello,
I encounter a problem with my XFX 470 8GB Hynix memory, invalid shares and I can’t solve it.
I tried:
*Tried other riser and only this GPU on the power supply - Invalid Shares Present

• Tried other miners - Invalid Shares Present
• Stock bios with stock settings - Invalid Shares Present
• Lower Memory clocks and core clocks - Invalid Shares Present
• Bios mod and try different OC like core clock 1150 with 1850 memory also 1100 with 1750 - Invalid Shares Present
  Below a screenshot with the GPU in question:
  
  

[rkulov]

Remove the dpm states. For all cards with 1100 core clock use core voltage 800-825. Use memory clock 2000 atleast.

[Dobreval]

If I use 2000 with 1100 and core voltage at 800-825 the GPU is unstable and the rig just restarts.