GPU core clock is stuck

Feb 3, 2019
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My gpu core clock is stuck at 450mhz while gaming ( it should go up to 1100mhz) , if i turn on streaming then it gets locked at 1000mhz but then temps are 80-95c... This started happening since i upgraded my pc with new mb ram and cpu.
My gpu is r9 270x
MB b450 aorus m