Quote from: drakoin on January 22, 2014, 10:15:40 PM

About the same here. 25.6 eurocent = 0.35$. And in the past weeks, there were days with 4 euros per day worth of coins with my >900 khash/s.

Thanks for your doubts. You are right, it was already a lot of effort, and we have to be 100% sure that it's worth it, and choose the most profitable, and still most ecological way.

You inspired me to redo all of the calculations. See below, another posting.

Quote from: drakoin on January 22, 2014, 10:15:40 PM

3 times as much as electricity costs ... would mean 8.50 euros / MH / day reliably.

Tell me your secrets, please. Where do you mine?? Perhaps tell me by PM.

I have 5.1 euros per day for electricity (slightly less, but I rounded it up), I have 2269kH/s which nets me on average per 24h 17.8 euro/day with current ratings (average over last 17 days rounded down and not taking in to account that sometimes 1 of my machines wasn't mining meaning profits are actually higher). As you are so friendy and helpful i'll pm you the details of my pool, but it's no real big secret tbh...

Quote from: drakoin on January 22, 2014, 10:15:40 PM

Quote from: Quacko on January 22, 2014, 04:50:24 PM

but I doubt that for 10% lower hashrate that I can get to 30% lower power draw from the wall. I can check my overall powerdraw and spendings easy as I have a meter that allows me to put in the kWh price and it shows my total power consumption and total price, pretty easy!

You can see yourself in that posting below. Measurements for 5 different settings.

I don't fully understand what you mean with "Measurement for 5 different settings". But I want to add, if electricity costs you as much as 40% of your earnings, that makes your earnings 2.5x higher than what your electricity costs, meaning that if u lower your best total hashrate by 10% to underclock/volt you need to have more than a 25% TOTAL decrease in power drawings or you actually lose money by undervolting/clocking. Which still seems a lot imo. The guy who lowered his powerdraw so that he could have 2 280x cards on a 450W supply, what are his hashing speeds? Because that is what matters. I see all of you in this forum talking about kH/W, but that doesn't matter. You need to compare earnings vs spendings and nothing more. Meaning when you lower your total hashrate 10% your total earnings will lower 10%. For every euro you earn less per day, you have to spend more than a euro less per day or it's less profitable.
And when you do your calculations, make sure you use TOTAL system power, because only your card's powerdraw is useless. When you pay your bills, you have to pay for total powerdraw, not just your cards. So lowering powerdraw by 25% for every 10% hashpower lost means lowering total power draw by 25%.

Quote from: drakoin on January 22, 2014, 10:15:40 PM

Quote from: Quacko on January 22, 2014, 04:50:24 PM

I just solved my problem too that I had with my powerdraw not going down even when I undervolted. Turns out I had a driver problem on my windows machine.

Congratulations. Now that you mention it, please explain the driver before and after situation to us, as it is power-related - perhaps it can be useful for someone else?

Well I was on the beta drivers of AMD, and they apparently gave me problems or perhaps I had driver corruption I don't know rly. When I undervolted my card, it helped to draw less power, but only up to a certain point, after that lowering the voltages more didn't seem to do much. Thing is I installed the latest non-beta drivers now and now when I undervolt more it actually goes down some, not all that much, but still some.

I am currently running on 1.04V for 1040Mhz core and 1500Mhz ram. The system that I am undervolting draws 83W with the gpu disabled and 300W with the card hashing away.
I have to say though, I can't play games with that vcore. It crashes, hashing is fine, but games need at least 1.15V but that's probably due to the fact that in games it runs at its full default speed of 1100Mhz instead of 1050MHz that I use for hashing (If I increase the MHz above 1050 for hashing my hashrate actually drops, same for the memory).