Hi Guys, i got 4 units of B250 Mining Expert,

And on 2 or 3 units, i got a problem with the 2x4 pin 12volt power plug near the cpu.

For un unknown reason, i got to much power came from this plug, with the result of a fused plastic connector to the motherboard, and the plastic around the cable are molten. Power supply about 1700w, chinese one.  (but was working ok for a few month before)

Do you know the cause of it ?  Maybe a riser bad powered (adaptator?) resulting the necessary power to come from the motherboard instead?

Same, got a problem too with the 3rd molex connector, passing too much power and molten the wire (yellow one). (this time i got a bad molex power adaptator)