* Also: you need to own it, be hashing with it, and have measured the power draw at the wall. No hearsay. I own two SP30s so I know from experience how they perform.
I've got a bunch of SP30. They are pretty good. Awesome even. But, no matter. They still won't ROI - ever. They run really well and it is a damn good system. However difficulty is high, BTC price is low. The calculus changed and it just doesn't make sense. I wonder when the .2 W/GHs gear is coming out? The next gen stuff is going to be interesting.
The question I have is firmware upgrades. My machines are running perfectly at 4.4T. Should I upgrade? What if this fucks things up? I kind-of like the machines running at full speed without any interruptions. I don't know if it is such a good idea to upgrade. Zvi?
Well, I believe that with 99% probability that should not create any problems, but if they all give 4.4, I see no reason to upgrade.