Fan swaps that actually lowered noise

Been thinking about this all week. cable temperature is the diagnostic nobody checks. Warm connectors are wasted watts. What's everyone else seeing?

Late to this one but heat reuse in an allotment shed is what makes the maths work for me in winter. Convince me otherwise.

Undervolting bought me 21% efficiency for a small hashrate haircut, and I'd do it again. What's everyone else seeing?