7gpu in dual mining and with core above 1150? you can multiply 535-540 by about two i guess
i have 6x 480 downclocked and downvolted and it use about 1050w of the wall
I dont dual mine, at least not yet. ETH only for now.
So calculating the wattage based on every card's software-based consumption is so inaccurate?
I haven't got my KillAWatt yet, but I assumed that 200w for Risers, SSD, CPU/Mobo, plus whatever the software says + 10% would be at least in the ballpark. Well, not a real problem but, I do have to get my electric skills cleaned up.
Really, the only way you can measure a system is "at the wall" by using a KillAWatt. There is so much more that goes into it than what you see in a tool like GPU-Z. Usually you will see 100-150W per card used, depending on the card and how much it is undervolted. (Remember, it is also the power draw from the riser as well) So yes, you will likely be at 1000W or so with a 7GPU 470 rig if you did some high end undervolting.
Now as far as your tweaking issues, one thing to keep in mind is that anything you can do in something like afterburner, you can also do on the card's bios itself. So once you know each card's sweet spot, you can technically work some bios magic and have those as the default settings on the card itself. Modding a bios is nowhere near as easy as the windows tools... windows is made to be easy! It can be a pain, and you can also brick your card doing it, but the OS itself is more suited for a stand-alone mining operation. So in the end, you can get those tasty hashrates you want, even with a mix-and-match setup, if you apply those settings in the bios itself. I initially was using all of the OC settings in SmOS, but changed them all to bios-mods as I added more rigs.