Quote from: scriber on June 24, 2014, 03:04:43 AM

Quote from: KOTEKPL on June 23, 2014, 11:35:57 PM

I am having the same issue as you guys. One cta goes to 120c right away and shuts down. it was working for for the past 3 months. the other CTA runs amazing over 800gh all the time
the "bad" one always ran hotter. i replaced the paste about 4 times now and like 4 cores go to the sky and it stops. at its different ones just seems like something is shorting out or i dont know what the hell is happing. any input would be great. i used ic diamond themal paste on all chips the "good booard temp are way down and it hashes amazing the "bad board is still HOT!

edit did some tinkering. found that letting the board cool down and then just start the one sounds like a fan in one of the pumps is ticking... also found that the "out" side of both cores on the "bad board" are really hot and the "in"side is cold. On the "good" board both side are equally Warm cound it be a pump issue? both pumps show speed but not as fast as the other board. if the fins inside the pump broke off the the pump would stiill spin just be clogged/not going anyhting? Huh

im really tring to figure this out. already had one of the power blocks that the soldered on the board break off that's why i opened it up in the first place. fixed that and now this heat/power/idk/short issue

Does sound like a pump issue from what you described. Perhaps the impeller is damaged especially if its rpm is not up to speed like your good board. Contact the company who makes the coolers, they are located in canada I believe. Tell them how terrible Cointerra support is and you noticed they are using their product which might have failed on you. Btw I would not use thermal paste on these units, probably a good reason not to is that it continues to overheat and youve done the job 4 times. Use liquid pro its tried and proven here by numerous people including myself

The bad board pumps are 300rpm higher then the good board. why did the paste work so well with my other board? i will have to give the liquid pro a try...
i ended up taking one of the bad board coolers off and took the copper plate off the bottom and found a white rubber/cyclone piece inside. its suppose to work as a channel for the water to go on the copper plate fins i guess. thing is it was gunked up with this white residue and the water had no way to get to the fins... ended u p taking the whole white rubber piece out and now have one core up and hashing at 400gh. still hot as helll but at least its hashing. we will see for how long... o and the hoses on that core are now the same temp..
i will do the second one tomorrow and take some pics for reference.