Mine also have the 4 pin regulator, they seem to work fine, if you don't forget to cool them ...
One of mine dropped all the components
because I tought it would run on stock frequency without extra cooling.
I re-soldered them all by hand using flux, and it's up and running again, with printed 40x40 air ducts and fans connected on them, now they behave and don't drop parts
Whatever you do, use the Kano version of cgminer, it runs more stable then the other versions found on github and is running with about 0.5A less power usage for the same frequency settings ...
One of mine dropped all the components
because I tought it would run on stock frequency without extra cooling.I re-soldered them all by hand using flux, and it's up and running again, with printed 40x40 air ducts and fans connected on them, now they behave and don't drop parts
Whatever you do, use the Kano version of cgminer, it runs more stable then the other versions found on github and is running with about 0.5A less power usage for the same frequency settings ...