Re: 16 Bitfury h-cards+1m-board+1pi+1PSU=400GH min guarranteed starts at 25BTC
Whoa, you want $17K for this?!!? So you're essentially trying to recover your Aug kit cost 3 months down the line. Nice try! 
This kit will mine 12.37 btc per month at the current difficulty; and this is assuming the kit can be overclocked to reach 500 GH. At 400 bare minimum GH it will produce 9.9 btc. So I'd say if I made an offer it would be in that range.
This kit will mine 12.37 btc per month at the current difficulty; and this is assuming the kit can be overclocked to reach 500 GH. At 400 bare minimum GH it will produce 9.9 btc. So I'd say if I made an offer it would be in that range.
Absolutely
I wanted to ad that each chip reached up 40GH with basic settings, and at top efficiency we've reached over 800gh/s. I let you imagine with what could be done with overclocking and manual tuning. When I announce 400 gh I talk about manufacture guarranteed rate. Real rates are much higher.
Here are examples of average work, without tuning up.
Also you have to take into account the very low energy (-/+ 256 w)
No miner is interested in "what if" wishful thinking. Can you demonstrate that this kit reached 800 GH? Also where did you read/saw that any bitfury kit is capable of reaching 800 GH?
Tell you what, I'll offer 13 BTC for the kit. I'll take a chance on whether or not it will overclock nicely or not (some cards have dead chips or just generally underperform so reaching astronomical hash rates is not always guaranteed).