Any good pc diagnostic and optimizer to recommend (freeware)?

my GPU monitor doesn't work properly (no shader clock and vmem amount shown)
I believe there is something wrong with the system. Any good tools to recommend?
Thanks

用Driver Sweeper 將AMD D DRIVER 連根拔起,再裝,都唔得
GADGET 個Shader clock and vmem amount 都係 ZERO

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有冇CHING有這樣的經驗? - GPU MONITOR 唔WORK

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師兄你用咩"GPU Monitor"?

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