Hello everybody,
as promised a bit more info on my 'delivery experience' with bitmine.ch last Wednesday.
Initially I choose to get my units shipped, but because
a) I met the bitmine guys already and we had a very good and informative discussion
b) and I live near by
I decided to pick them up myself.
Giorgio sent me an email before and told me not to come before 5 pm, because they only got the mining boards with the Avalon chips mounted on them from the factory by mid day. When I arrived only half of my batch was ready to go and the other half was still in final assembly. Christian and Giorgio took me on a tour through the assembly process and explained how and why they build the clones the way they are.
The weakest link in the Avalon miner design is actually the shitty TP-Link router, which runs OpenWRT with cgminer on it. But as they wanted to create a clone they needed to copy that as well. The by far better and probably more stable solution would be a Raspberry Pi, but I guess in their next project (announcement went out today) this unit plays a vital part.
The machines I got are very well made and as written before are a 99 % copy of the existing Avalon design. The only difference is the case, because the Aluminum Case from YiFu is just to heavy and not practical at all.
The unit comes with the latest firmware (20130723) and the default settings clock wise is 325 MHz, which gives you around 100 to 105 GH/s.
I experimented with one machine a little and overclocked it to 350 Mhz which resulted in a stable 110 GH/s with a error rate of nearly 7 % (!), which is far to high. Temperature readings at the time where T1:20 T2:46 and T3:47 in a 19 degree cooled server room.
Overclocking the chips to 375 Mhz was a absolutely disaster at a hashing rate of 64 GH/s and error rate of over 50 %.
And here for fun and frolics some pictures:
Not 100 % ready yet ... | 
One Clone coming up! |
More to come soon! | 
After a looooong day ... |
That's it ... so my impression is that bitmine.ch is run by trustworthy guys who try to keep their promises and stay honest all the time. I sucks that Avalon did not deliver chips and in turn wasted their (initially good) reputation. The great no bullshit policy turned into a complete mess for the whole community.
I hope it was worth it YiFu.
Mine and peace for everybody!
one4many
