Intel QH73 2.3 GHZ ES CPU

first of all sorry for my bad english . i have  msi z170a  pc mate motherboard and intel QH73 es cpu my pc won't start can you tell me what bios Version i need to downgrade to start my pc with this engineering sample cpu  i tried 2-3 bios file but i fail so i need your help <span>:anguished:</span>
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