If you keep the temp of your cards low enough, it's not an issue.

 If you have not maxed out your available power capacity, pushing a GPU is more profitable (unless you have a CRAZY HIGH power cost, then you might want to calculate out the question).

For the GTX 1070, it's debateable from one day to the next if ETH or ZEC is more profitable - it tends to be very close as miners "chase the profit".

 For the GTX 1080, don't bother with ETH - it's INFERIOR to the 1070 on ETH, while being much better than the 1070 at ZEC.



 NVidia isn't "bad on ETH", it's more about "GDDR 5X is bad on ETH" - which is why the 1080 and 1080ti are not good ETH mining choices, coupled with the 1070 having a fairly high MSRP / hashrate ratio compared to AMD RX 470/480/570/580 cards and the GTX 1060 (which is probably the BEST overall NVidia card to mine ETH with now that NVidia GPU pricing is getting back to semi-rational and AMD GPU pricing is heading that way).

The higher "overclock" versions tend to have better cooling solutions - the Aorus line is a specific case in point.

 The only GOOD point to the reference-type and FE-type blower cards is in a closed case where they tend to exhaust most of the hot air OUTSIDE of the case - but some well-designed fan-type cards can argue the point, like the "no video connector at all" Sapphire Nitro-based "mining" cards.

How about that Rosewill "GPU mining" case?

 Less expensive than any non-open-frame alternative I've seen, though it does seem to have some minor limitations.

https://www.newegg.com/Product/Product.aspx?Item=N82E16811147270&cm_re=mining_case-_-11-147-270-_-Product

 Someone has a review thread on it in here somewhere.


 A closed case setup can keep cool if you have enough CFM of fans blowing air through it.
 Keep in mind that *ALL* recent ASIC miner designs are close-case type, and have a lot higher heat density than most GPU rigs ever thought about.

It's not Windows - it's that very few of the AM4 socket motherboards are intended to run more than 2 or PERHAPS 3 GPUs at a time.

 The Biostar "BTC" model seems to be the major exception so far.


 Windows 7 is easily capable of running 4 GPUS out of the box if the MOTHERBOARD supports that (as I recall it's actually a DRIVER limitation at 8 GPUs, not an actual Windows limitation).


 It might be worth trying one of the "mining-specific" Linux distributions, sometimes the actual issue is the BIOS on the motherboard, which LINUX tends to just IGNORE so it can talk direct to the hardware once it's past the initial boot stage while Windows prefers to work WITH the BIOS even when it's less efficient and can cause issues.

 Their profitability varies a lot - sometimes good, sometimes bad, depending on what folks are offering on their market for each specific algorithm at the time - and they are OFTEN high profit on one and low on another.

 Keep in mind they are a MARKET for hash, not a pool as such.

It would be MUCH more efficient to use that water for evaporative cooling.

 You're looking at a LOT of water flow to be able to cool anything significant with that method.

 Another alternative - you've got about half of a "geothermal loop" involved in your setup.

I was going to ask about LINUX support, but then I noticed the style of the terminal window.

 OK, so sue me for missing the "support" line the first time around.

 9-)


 Based on the stats, I'm guessing the Innosilicon A4's ASIC chip at the core of this?

 As far as I know, the Gekkoscience and the Futurebit Moonlander are the ONLY USB-based miners currently in production.

 Any USB based device, especially "stick" type, is going to be much lower hash/$ than full-up miners, it's VERY rare to ever achieve a significant percentage of ROI on them.

Even a legitimate cloud mining company is normally going to be less profitable to use than running your own hardware - they are in the business to make a profit after all, and the "contracts" are always structured so that they WILL make a profit, and whatever might be left over is what YOU get.

 If you're in a very high electric rate area, that might be different since your costs might EXCEED the costs of the cloud mining contract.

 Dunno why this is being paid out, the superblock is BROKEN again and has BROKEN twice in the last week or so.

 100F isn't all that hot - most computers and ASIC will handle that just fine if you don't push them on overclocking super-hard.

 The Yahoo server farms in their "chicken coop" design are targeting 85 or 90F input temps as I recall - and those are STANDARD rack-mount systems with the only fans involved the fans in the servers themselves.
 They do some interesting air-flow management tricks so they don't need more fans, but the tricks rely on rack-mount servers and wouldn't work for most cryptocoin mining gear (IBeLink or Pinidea would be current exceptions).

 Gigabyte's location is less than 10 miles from the Columbia River (I think it's more like 5) in a small city - water availability is not an issue if they wanted to use it.
 For evap cooling, "cool" water doesn't MATTER - the heat pulled by just evaporating is more than 100 TIMES the amount of heat to raise the temp of water by one degree.

 I tried to sign up for one of their "open houses" but they are "all filled up" on ALL of their current dates.

 They can mine a FEW algos effectively, but they are less flexable than the 1070 or the RX series cards and outside of ZEC the coins on the altos the 1080ti are GOOD at tend to be small and can't asorb a lot of hashrate without profitablity crashing.

 ZEC among many others - ETC is small potatoes in comparison.

 On the other hand, a well-tuned rig of RX 470/480/570/580 with bios-modded cards can still pull in about $2/day per card right now on ETH, RX card pricing has been dropping quite a bit over the last month, and availabiity is getting somewhat better.

 151 watt TDP - same as most other 1070 models that don't push the clock rates very very high by factory default.

 1080 model is 180 watt TDP - same as other 1080 models in it's clock rate range.

People are still building new ETH rigs (though in lower quantities per week than last month) because they think the rigs will pay off before ETH moves to Proof-of-Stake.

 Probability has dropped on that though, which is why the "rate" of new rig addition has dropped, though if ETH price stays in climb mode the rate might go up some for a while.

In my limited experience so far with the Zotac "mini" cards, they work well and stay reasonably cool as long as they have good access to air.

 This applies to both their 1070 and 1080 varients.

 They appear to be doing straight-through airflow, with what appears to be a damper system for cool times.

 Ambient temps in the area tend to stay below 100F (we've had a HOT summer compared to norms this year in the area but I think we only touched 100 one time - LOTS of days with highs in the 90s though).

 It's possible they have some sort of evap system set up at the intake (ref. the Yahoo "chicken coop" data center design), but I suspect they just rely on massive airflow.

Sure - all you need is a half million to start with for ordering ASIC chips from Bitfury, then a bunch more money to design and build an actual miner around those chips.

Bitmain used to make a water-cooled miner (C1 model I think) - but it apparently didn't sell well enough to continue making it.

 Main issue is the sheer number of chips involved, and the difficulty of getting the "plate" flat to ALL of them (this appears to be why Bitmain moved away from monolithic heat sinks after the S5).