about t17e and m21s

[moritezza]

hello

currently i have few t17e and they need lot of work for check hashboard broken or i lost hashboard and need to send to repair

i want switch to m21s, its stable or its like t17e hot and unstable?

can anyone tell me?

Thanks

[BitMaxz]

You might be just received a defective t17e unit from Bitmain the only difference between t17e and m21s is the power and noise.

You can adjust m21s to run at low power mode with less noise compared to t17e and also the power consumption is higher than t17e.
Check the reviews from Phil here https://bitcointalk.org/index.php?topic=5169309.0

And check t17e Phil's review her https://bitcointalk.org/index.php?topic=5203927.0

Then decide if you stay with t17e or switch to m21s.

[philipma1957]

frankly neither one was very good.  The m21s died this week it is 14 months old. the 17e's are 12 months old and still work I have had endless issue with them.

So 1x 21s = so so most likely it was a loss.
     2x 17e = so so most likely these will break even since they are still mining.

[moritezza]

frankly neither one was very good.  The m21s died this week it is 14 months old. the 17e's are 12 months old and still work I have had endless issue with them.

So 1x 21s = so so most likely it was a loss.
     2x 17e = so so most likely these will break even since they are still mining.

which miner you trust and its stable?
i had 6xt17e and now just 3 of them works 
can you which model of miner with ~50TH and with like this price is stable and without endless issue.

Thanks.

[mikeywith]

frankly neither one was very good.  The m21s died this week it is 14 months old. the 17e's are 12 months old and still work I have had endless issue with them.

Did the whole miner die or just the PSU?

which miner you trust and its stable?
i had 6xt17e and now just 3 of them works 

You can blindly shop for any miner on planet earth and rest assured that it will be much more robust than the T17e, my personal experience with all the 17 series is terrible, the only exception was the S17 pros which I won't call a great experience but just not that bad compared to the rest.

M21s has been great for me, MicroBT gears, in general, are better built than Bitmain, Avalon is even more robust according to my knowledge that is based on other miners reviews since I don't own any Avalon gears, Phil's luck with the M21s might be bad and that's about it, he got 12 months on that t17e which in my book is outstanding luck, if you can get M21s for a good price, go for it, keep in mind they are LOUD as hell, they make Antminers sound quiet, and the other downside is there is no custom firmware, so tunning and all that isn't going to be an option.

[moritezza]

thanks, ill looking for m21s
but can anyone suggest me any miner with ~50TH and stable like s9j?
honestly s9j is really stable
i looking for a miner with ~50TH and stable (not very hot, never Break asics and etc)

Please suggest me the bests you tried.

Thanks.

[mikeywith]

What power range are you looking for? since you are considering M21s then you don't seem to care much about the efficiency, if that is case, why not get 5*S9j and underclock them, going under 470 in the frequency and about 8 volts you should achieve about 70w per th, which isn't far away from the M21s' efficiency of 60w/th, price wise, S9j wins big time.

Current used gear prices in China

M21s 56th = $900
S9j 14.5th = $90

at 70w per terahash S9j won't be doing 14.5th, it will be doing the only 10th, so you will need 5 of them, the total cost will be $450, you will pay more for shipping 5 miners as opposed to a single miner, but you will get a total of 5 PSUs / 5 Control boards and 15 hash boards as opposed of 1 PSU and control board and only 3 hash boards, if you lose a board on those S9js your loss is only 1/15, one board on the M21s is 33%, a PSU failure on M21s is 100% failure while on S9j it's only 20%.

My way of doing the math when purchasing mining gears is a bit weird and many people think it's funny, but to me, the points I explained above really mean something, I would buy S9js over M21s every single day of the year if the price difference is this large and I wouldn't really care about the extra total power consumption of 0.5Kwh.