There are currently at least 6 companies that have designed 14/16nm mining chips and put them into production (Innosilicon designed the A3 but it apparently never hit full production sorta making 7).
The issue is that only 2 of them (Bitmain and Avalon) currently sell miner units direct to individual small miners and that BitFury has been VERY slow about making chips available to their potential 3'd party miner manufacturers, not that there aren't enough companies with the chip designs to provide competition.

14 AWG wire is rated for 15 amps MAX by the NEC.
12 AWG wire is rated for 20 amps MAX.

 You need to go to at least 10 AWG.

 It's not practical to use a generator without a UPS unless you are willing to suffer through a short power outage before the generator can kick in, *OR* the generator is running all the time (EXPEN$IVE) and you have a VERY fast automatic transfer switch setup (ALSO expen$ive).



 IMO it's not cost effective to use a UPS on a miner - if your power drops out more than once every couple of months you're going to have issues with mining anyway, as you're probably going to lose your internet connectivity as well fairly frequently.

 No, they do not need to be the same card.

 Same MODEL of card will tend to be more stable though - as in run all R9 290, or all RX 470, etc, instead of mix-and-match.

My only issue with the power and reset buttons on the motherboard is that they're placed badly, anything but a riser or a VERY short board in the 3'd 16-bit PCI-E socket blocks them.
 This obviously isn't an issue in an all-riser rig.

 I've got at least one full-ATX motherboard that puts them in front of the memory sockets near the ATX 24-pin power plug, that is a MUCH better position for them for most folks (other than riser-rig miners).

 First I've seen of it, but it's not out of line *especially in a 6-8U rack* with known specs on the Bitfury chip.

 Shouldn't be millions - but I would not be shocked at a price in the 5-10 thousand USD range, or if it gets marketed mostly/exclusively to "large" buyers.

 The chips are heat-sinked through the board into THAT heatsink - which is enough for running Scrypt on them.
 The GC 3355 eats a TON more power doing SHA256 - I'm pretty sure that none of the CCMiner/SGMiner/etc varients intended for use with the Gridseed blades enables SHA256 because you were guarenteed to FRY the board if you tried.

 I can see WANTING to do this - but it would be like trying to run 200 MPH in a YUGO at Indy, it just won't WORK.

 Also, the reason that they came up with the "blade" designs was that the GC 3355 was NOT very efficient at SHA256 mining, it got beat out VERY quickly (IIRC it was similar efficiency to the Antminer S1, which wasn't even CLOSE to the S3 much less the S5) but it had no competition at ALL on Scrypt for several months and it took something close to 2 years for the competition to get significantly more efficient and make the GC 3355 non-profitable on Scrypt for most folks.

Bittrex seems to want a "message" as part of the transaction to deal with BURST at all - definitely does so on deposits, never tried to withdraw BURST from them.

 Don't try running them without a fan, but they don't need a real high power fan. Pretty much any 92mm fan should push enough air to keep them cool enough.

 DO NOT TRY TO DUAL MINE with one of these units - it WILL fry the PS part very very quickly.
 They were not designed for mining SHA256 on at all, even though the CHIPS are capable of doing so they eat WAY too much power than the regulator circuitry can handle (that part is MARGINAL even for just Scrypt mining).

 Any source of 12VDC that's reasonably well regulated should be fine - lot of folks ran these off PCI-E to Barrel adapters.

 As I recall ballpark 40 watts per side at the wall was the normal consumption of these, running on some 12V bricks of unknown efficiency - might see more like 30-35 at a guess running them off a Bronze or better computer PSU.

 amount of water in the air is constant, but air gets hotter = lower humidity level.

 Even WITH my evap running, I rarely see 40% humidity anywhere INSIDE my place, even when it's raining outside.

 Without the evap, commonly somewhere under 20% (can't tell HOW far under sometimes as my meter won't read anything under 16%).



 Which reminds me - a portable-type evap MIGHT work even in Tampa humidity, taking hot air from the output of the miners (which will be fairly low humidity) and sending it back into the input at 20-30 degrees cooler than the output - but you will STILL need quite a bit of ventilation to keep the humidity from building up, optimally more total vent CFM than the evap unit pushes.

 Evaps do NOT work well (except the EXPENSIVE 2-stage stuff) at the normal humidity levels in the Tampa area.
 One thing to keep in mind - a "dehumidifier" is nothing more than common mechanical air conditioning specifically used in a dehumidifier mode - most "common" window-type A/C units have a "dehumidity" option.
 ANY usage of mechanical A/C kicks your power costs up a TON - and it's rather redundant to use both an Evap unit and mechanical A/C.

 It's not so much that the units are expensive, but that dehumidifier is going to be expensive to RUN, while the Evap unit isn't going to work very efficiently.

 It's not that they are wrong, it's that nobody does the computations in power used per month when figuring how much power you need to be available.

 Heating is NOT an issue.
 I have somewhat less total power consumption on my rigs than you are targeting, yet I've had to keep at least 2 windows open during the last 2 winters (one of those in IOWA, where it hits negative-F COLD pretty much every winter at least some of the winter, the other in central Washington were it never saw 0 this past winter but did see sub-freezing for a few months straight every night) to avoid OVERHEATING during the winter.

 Your only issue is cooling - and given Tampa humidity, massive airflow is your only viable affordable option.

 The ONLY additional cost is the air filters - common 20x20 furnace filters work fine for this application, and are NOT all that expensive.
 At the scale OP is positing, you're basically be replacing 1 or at most 2 filters a month.

 I do agree that it's redundant in cases where evaporative cooling is in use.

 A LOT of commmercial spaces, especially smaller warehouse or retail, have 100 amp OR LESS service available.

 The BUILDING may have more, but many commercial spaces are not the entire building.

 use 15.12 not 15.2, much better driver version for mining (IMO the best AMD ever did, but unfortunately doesn't work on new cards like the RX series and I'm not sure if 15.12 works with the Fury/FuryX/Nano).

 I've had some of the single-fan Gigabyte GTX 1070 cards for a while, they stay plenty cool as long as the fan is unobstructed.
 1080 a good single-fan design should be OK but don't block the fan at all - 1080 don't eat that much more power than a 1070.
 I'd be VERY iffy about even thinking about mining on a single-fan 1080 ti design if one exists unless it's a high-end blower style.

 First 3-card-wide single-GPU card I've seen in a LONG time (HIS Ice-Q blower designs were effectively 3-card width).

 Should cool well, but obviously intended for use as the only card in a system, or max of 2 in a system.

 I'd say NVidia has already priced VEGA upcomming competition into their higher-end cards (the 1080 and 1080ti).

 Only reason I'm not adding more cards right now is that I don't have any more power available where I am at right now - and the place I have arranged to move into that DOES have more power has an existing tenant that's dragging their feet getting moved out.

 Yes - but in general the machine will end up being somewhat less stable than running a "pure" rig one way or the other.

 Easy to do on Windows 7 or 10 (almost the ONLY think Windows does better than LINUX), can be done under LINUX but the installation of drivers is a bit more complicated.

Don't.

 The "dual mine" mode on the Gridseed GC3355 chips soaked about 10 TIMES as much power as just single-mining Scrypt.

 There is a reason the Gridseed Blades pretty much used the SAME power circuit as the 5-chip orbs did - the orbs WERE designed to dual-mine with, the blades were NOT.

 Even on just Scrypt mining, the blade power circuitry was marginal at best, and tended to die a lot due to inadaquate heat sinking.

 The actual chips *might* handle dual-mining, the power circuitry isn't even in the right COUNTRY to do so, much less the right ballpark.


 Yes, the Dual Miner used the same Gridseed chip.