It depends which gpu's will you use.
One of the best power vs hashrate gpu for eth is AMD 6600. It gives around 31 - 32 mh/s with 55-60W only.
AMD 6700 gives 42 mh/s with 90-95W.
Nvidia 3070 - 60-62 mh/s with 120-130W

All this info is if you mine ETH.
For other coins the hashrate will be different