I never mined bitcoin with gpus but I mined Litecoin / dogecoin which was scrypt algo and it was very power hungry.
Back then psus were expensive and capacity wasn’t as high as today. The best bang for the buck was a 750Watt PSU. So I had a rig which basically only had 2 Gpus inside it and it was pulling 700 watts. So pretty much at capacity.
With ETH mining, I think with the same Psu I was able to mine with 4 gpus. Crazy how much power they used.
Litecoin mining with 280x/290 was a blast. I had my 290s flashed to 390 firmware which "unlocked" them and increased the hashrate. I think the wattage was above 200w per card and you had free house heating from the rig. Those cards were power hungry AS FUCK. Good times