Fans on most electronics are variable based on heat, so that would explain why people have different results. My work laptop is quiet until I get too much clutter around it, then it starts whining like a vacuum cleaner until it cools down.
People have to get past this idea that "fan noise is bad". The fan is working to keep the electronic device cool. If the thing gets too hot, it will eventually get very, very quiet when it stops working completely.
There was someone who took several PS5's apart and some consoles had different fans than the other or something. And it was completely random which Ps5 got the better fan setup. Let me see if I can find it again.
Got it https://www.google.com/amp/s/www.pl...ps5-fan-fans-cooling-louder-how-to-check/amp/
In their research, Les Numeriques found that one fan (Fan A) ran 38 dB at the air inlet while the other (Fan B) ran 43 dB at the inlet under the same conditions. It’s not a massive difference, and still much quieter than the PS4, which could exceed 60 dB at times. The different PS5 fans are the same size, fitting into the PS5 in the same way. Where they differ is in the blades, with vastly different configurations on each one. The quieter fan blades don’t extend all the way to the central spoke of the fan. The blades of Fan A are also more densely packed.