Re: [150TH] [PPLNS 0.5%] Jonny's Mining Emporium (bravo-mining.com)
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It's definitely a more expensive piece of hardware than Bitmain's latest. Dollar per hash and watts per hash are both better with the S9. However, Bitmain's hardware is flaky. Bitmain's customer service is painful to deal with. Bitmain's software is atrocious.
So... the question becomes, "how long will my hardware function without the need for maintenance or repair?". With the S9, the answer is "not that long". Hopefully Canaan has built the 721 to the same quality standards as their previous generations. I've got 20 A6 that are all hashing away. I think I've rebooted them a few times... and I replaced the fan on one. That's the extent of my maintenance.
I'm very happy with the quality and the up-front price premium is something I'm willing to pay to have the peace of mind.
It's actually reasonable for cost. Its the cost of operation that is 1.5X of the s9.. and important part of payback.
I know people have complained of the quality, but I haven't seen an issue, personally. As far as longevity, I think the history of keeping something for more than 18-24 months.. is unlikely. An S9 bought today better be sold within a year if you want to get any money out of it.
I've kept my S5s too long. I'll be lucky to get $100 bucks a piece for them... and I'll fell guilty about it.
