Quote from: jstefanop on December 20, 2017, 05:44:25 PM

Quote from: Hintsal on December 20, 2017, 05:11:48 AM

Quote from: philipma1957 on December 20, 2017, 04:58:26 AM

Quote from: Hintsal on December 20, 2017, 12:23:19 AM

Ok I asked before if the fan was supposed to be wicked loud. Well I think mine is crapping out now. The thing screams like it has a bad bearing. My question is can I disconnect the fan and put a USB fan to blow on it and provide the cooling? I would even put 2 on it since they are so quiet. One pointed at the heat sink and one at the other side. Ohh and is the fan easy to remove?

Same issue .

I pulled the bad fan and I run very well using an external fan.

I think three fans are reported as defective by you me and a third person

I have a video of them on YouTube wait for it:

Boom here it is

https://www.youtube.com/watch?v=H-4QqZKMKWA

Cheers. So do I just unbolt it and unplug it from the board and I'm good to go? Eventually planning to try modding them from their current 3.4mhs

The fans are sleeve bearing, so they will spin up faster after the sleeve is worn in which causes them to make more noise. Nothing wrong with them, just couldn't afford putting in 5+ USD ball bearing fans for a $50 miner. Only issue with first batch fans is that they overshot the RPM after sleeve wear-in so they spin closer to 13K RPM instead of 10K. Next batch will have this resolved and should have some extra fans if anyone has one that spins way too fast.

FYI high quality ball bearing replacement for these would be something like this, but as you can see they are not cheap.

https://www.digikey.com/product-detail/en/sunon-fans/MC25100V2-000U-A99/259-1569-ND/2757806

1. How do you measure fan speeds/rpms?
2. What is approx. lifetime of fans included?
3. Which particular model (of fan) would you use if cost would't be an issue? or any of ball bearing will do?

4.How can I use some kind of bfgminer record? to be able to see what happend like 3 or 5 hours ago (errors, restarts, block finds...). I know what letters means but I want to see it as some
kind of data file with all details through the time like I see it live on monitor. Is it even possible?

Thanks man, I appreciate it.

EDIT: I see #3 answer.