i don't know why are you stuck with the voltage thing?
If you can't lower it by -100 then you simply won't do it, the hashrate stays same (or even better) if i don't undervolt.
The point is the ~ 850hs at 1260/2100 with samsung memory. Thats stock core/+100 mem, which doesn't add on the power consumption.
On full stock 1260/2000 i get around 815hs.
Will put this rom tomorrow on my 5x470 rig and run with sgminer if that's whats "the thing".
No no, do it on linux with sgminer
I want to see you do 800 + ..
There's a thread from a client of mine testing a 480 4G rom i did for him, i got 800ish on lniux.. he did 850 with ease on windows..
That's my point..
The undervolt point is fairly simple. Card A has an asic quality of X percent (a low one!), which means it has an X amount of leakage, which means it can easily be undervolted and will remain perfectly stable.
CardB has an asic quality of X percent (a high one 'yeah sounds weird..'), which means it has a different amount of leakage and will not easily undervolt.
If you happen to have a good batch, your cards will handle that. If not, you will have systems crashing non stop.
I had a very good batch of Nano's, i could easy do -125mV VDDC and -175!!mV MVDDC, on all of my 100 nano's, others with the same reference design nano's couldn't even handle -100mV MVDDC....
Again, that is my point....