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Efficiency tuning for zen3 (5900x)

Hi, 
I currently use a 5900x and I am very happy with its performance, but not so much with its power consumption. Is there a way to reduce the power consumption?
On older chips you could undervolt, but afaik, undervolting doesnt really work for zen2 and zen3. I used CTR on my last chip (3800x) but was told, that it is a bad program and I shouldnt use it. I also currently use PBO with Curve Optimizer, which gives a nice boost in performance but doesnt really do a lot for power consumption. Do you have any idea?
Thanks for your help

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Run it at stock, or eco mode for lowest consumption. As soon as you touch pb2 or curve your consumption/output will go up.

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