Quote from: SychoPhant on December 23, 2014, 03:50:03 PM

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[quote author=raskul link=topic=903102.msg9922620#msg9922620 date=1419319929]
I have some serious reservations about how Bitmain have gone about creating their newest miner, the S5.

After seeing the magazine adverts and watching the speculation build, it would seem, to me at least, that they are designing a miner which has a good chance of failure due to the risky design.

Bitmain have done a private batch of S3++ using the chain design on an entirely new chip, in preparation to sell the S5 en-mass.
S3++ hasn't been released to the public, so we can only presume that there are a few large farms, with vested interest, mining large scale, across the world on a private batch of S3++ miners.

The string design is a very bad method to use, after so many experienced the troubles with the Prisma from AM... and... AM had to recall an entire batch.

Sure the S5 is BMT's most efficient miner to date but it's quite late to the party, the SP20 can reach this efficiency [b]and below[/b] with proven dc2dc stable design and... without what seems to be, by Bitmain, a risky cost cutting exercise.

I can't help but think something is not quite right here... presuming that there were problems with the chips, or the boards on the S5's for them to appear this late after advertising... having an open-top design of the casing, surely won't allow enough airflow, either?

I can't get my head around what Bitmain are trying to accomplish here, so I'm putting it out there... it's a product which has high chance of failure and I can foresee many RMA'd units.

:-\
[/quote]

Seems serious old boy....

Is there any evidence of localized heating or hot spots on the boards?
How about in the Bui, any sign of uneven cooling?
Are you running at 12v or 9?
What guage cables are you running from the PSU and is there any sign of excess heating?

I have no evidence as units are yet to ship, simply from what I see on the announcement thread, makes me irk towards something not quite right about the design. Undecided

Quote from: SychoPhant on December 23, 2014, 03:50:03 PM

One wouldn't want to invest in something which has design problems. Do you have much experience in asic or electronic design yourself?

I never buy batch 1 miners for the specific reason that you just can't be sure and I only have experience in these fields from my home mining endeavours. It's a serious gamble to lay out vast amounts of money on something which has not gone through proper independent testing. I'd preferred to see a few independent reviews before any miner goes on sale, not just BMT.

Quote from: SychoPhant on December 23, 2014, 03:50:03 PM

I'll put my bulk order of 52 on hold till I hear back from you old chap.

I cannot make decisions for you, you should weigh up the facts for yourself and decide accordingly. I'd just like to see any initial bumps evened out before anyone puts their money into it.

Quote from: SychoPhant on December 23, 2014, 03:50:03 PM

Toodle pip for now....

all the best to you and yours this festive season.