I now refuse to buy Bitmain S7, on principle. They used to be good, solid manufacturer. Not any more. Since S5, they've been producing sub-par miners, I'd classify them as just above junk. They have no Quality Assurance, don't believe the QA stickers on their S5 and S7 miners. Their chips vary as much as 20-25% below their advertized hashrate. They provide almost zero After Sale Service. What customer service? They laugh at your face when you run into trouble with your S5/S7 miners.
Bitmain got too big and now their head is in the cloud. Please support their competitors like Avalon; Do not point your miners to Antpool, there are many legitimate pools like kano, why do you continue to support centralizing Chinese Antpool with their bad practices like mining on empty blocks?
They did nothing for me about the s-7 batch 1. My loss was about 150$
The problem is math.
3500gh vs 4700gh
612 usd with shipping vs 500 usd with coupons and shipping
my failure rate on s-7 is 1 of 19 and the fail was low hashing 4400 gh vs 4800 gh
my fail rate on avalons is 1 in 11 and it was a full board 1650 gh vs 3300 gh
I did get service for it but it was my error so I paid for that.
To bring all those factors it does favor the discounted s-7.
I am not buying it , but I am not buying the avalon 6 in general I am mostly just annoyed at the gear choices I have.
Well it is Easter I should stay off the site and hang with the family.