Yawn. Miners this efficient were available over 8 months ago.
I don't understand why Bitmain would waste time and money updating the S4. What a waste.
They had the chips available it was easy to do.
This is actually good for miners with 205 volts and low power costs.
If you are not in this group then it is worthless to you.
Like myself you need the s-6 or s-7