Quote from: entr04y on December 14, 2014, 08:59:02 PM

I have a C1 that I have had for about two weeks. the first week or so it was fine, but it has started to drop chips after a few hours of running. the chips that X out are generally on the 2nd two boards and it can be anywhere from 1 or two per board to and the entire board that goes offline.

Even when the chips are not showing X, the hash rate bounces around between about 700 and 1100ghs.

I have one Rosewill capstone PSU (1000W gold) dedicated to running the C1 and cooling pump.

It came with the 10/16 firmware and was set to 250/0725. I tried updating the software to 11/26 and set the freq/voltage to 250/0760, but it is still very inconsistent.

I have two C1s, and the other one seems to hash steadily at just over 1000ghs on the 10/16 firmware at the defaults of 250/0725. The second one also has it's own dedicated Roswiill Capstone 1000w.

Any suggestions, or do I have a defective unit?

(i've sent the same content to info@bitmain)

If its time related then start investigating power related things. The PSU would be the first thing to look at. Try powering only the bad blade pair (as long as they're the ones that power the controller) only and see if they still drop out. Alternatively, you could just swap your PSUs over and see if the problem moves.