You’re really depending on your mobo to not blow a cap and using way more energy. A used older ryzen 5 is comparable and much better, and the mobos are current. Even a newer intel F processor isn’t much more the 3770K is way overpriced for its performance.
the 3770 was 30€ on ebay and given the rising TDP numbers on Intels latest desktop platforms, I really doubt it uses any more energy than a recent system.