For all those overclocking their D3s: The increase in profits with overclocking vs electricity usage is generally mutually exclusive!
There is an important caveat with this that should be mentioned: Do you believe in crypto?
What I mean is, a few years ago a friend of mine was obsessed with tuning his GPU rigs for energy efficiency over performance, his mantra was that if it makes $5 less a day but costs $9 less then that's like a bonus $4, I didn't bother with that as I believed in the coins I was mining/hoarding. I won in the end because his $9 a day saved is still $9 a day saved, but his $5 a day lost is now $200 a day lost because that lost crypto has risen in value.
You are absolutely right Ubersonic! You can still mine a good/promising coin with a loss which might turn into gains in the future, no doubt! It all depends how much you are able to shell out for your electricity bill without getting problems with your bank! Not everybody has cheap or free electricity. In my case, my day rate is too high for a profitable D3 mining (28 cent/kWh!) but my night rate is ok (17.5 cent/kWh). I also have solar, so during sunny days, I mine for free! If I mine with all my 5 miners 24 hours a day (without solar), I would have to pay for over 42000 kWh per year @ a daily rate of 23.6 cent/kWh, which means over $10,300 in electricity costs alone, and this is a lot of money for many people!