Quote from: kilo17 on February 27, 2016, 07:52:36 AM

I am not an engineer but that board design looks crazy to me. Why on earth would there be 26 chips on 1 side of the PCB and 3 on the other side.
That looks like it would be a disaster to cool and the traces look whacky with the square layout of the chips on the side with 26.

Who told you that these three chips require cooling ?

26 chips go with thermal paste to heatsink , such as Antminer S5.

Quote from: ukrcoin on February 27, 2016, 07:00:03 AM

...
Have you question, I will try to answer

But where to take the S3 owners screws and springs for it ?

I see that it is only suitable for Antminer S5 upgrade, not for S1, S3 or C1, where the blades are the other way around.