They ARE unprofitable at that high of electric cost, just checked using current stats and RIGHT NOW they are break-even at appx. 5.2 c/KWH - folks like me in VERY VERY CHEAP electric areas with rates less than that are still making money off them, but not by a lot.
 At 9c/KWH you're burning almost twice as much in electric cost as those miners are managing to make in Bitcoin mined value.

 An S9 should stay profitable for quite a while, even at 9c/KWH - just not VERY profitable - as diff increases are quite slow at this point and Bitcoin price seems to be recovering slowly from the recent exchange hack/theft.

Right now, the best options (depending on which coin and depending on if you're more worried about hash/watt or hash/$) would be the AMD RX 480 / RX 470 (pretty much a tossup between those two) and the NVidia GTX 1070.

 The AMD pair wins on most coins, but there's a couple spots the NVidia rocks even on "hash/$".

 OK, that shouldn't be the issue - most of my machines see that on hot days around here with just an evap cooler running in a room that I wish I could get a bit more airflow through.

 It's almost got to be lack of airflow IN the case, or you're pushing them too hard when they have poor airflow due to being too close together.

 The problem with NewEgg product ratings is that they're generally from folks that have only had a product for a month or so, often less.
 A BAD NewEgg rating is a definite red flag indicating major issues, a good one is more like "short term good, long term unknown".

 On the other hand, I do respect JonnyGuru reviews - which make it even more interesting given they LOVED the Seasonic X1250 and EVGA 1300 G2 units I use a lot of, with specific comments and testing showing near-Plat efficiency on GOLD units.

 Still, can't beat $120 on a 1000watt high-efficiency PS that looks like it might be built for the long run.

 Whoa - how hot is the temperature in the room the machine is in?

 I wish you'd mentioned the "in India" part in your original post.

 Install XFCE in place of that Trinity nightmare Ubuntu used to use by default (or run XUbuntu which is pretty much the same concept), then set up your startup file in the "startup settings" menu.
 I remember reading that Ubuntu either moved to a different desktop manager in 16.04, or were going to do so in 16.10, but don't remember which offhand.

 I never found a way to auto-startup ANYTHING under Trinity that had to have X running before the program itself started.


 Seasonic X850 is usually about the same price as the EVGA Supernova 850 - I've got several of my rigs running those PS.

 I have no idea who Rosewill has building their power supplies, and I tend to stick with manufacturers I've had few issues with (which comes down to Seasonic, *1* dead PS at less than 10 years usage in almost 20 years out of probably 35-40 of them by now, EVGA has a good rep on their Supersonic series but my experience with those is limited so far, and Silverstone had good luck with for a long time on about 20 used but have had issues with a couple of their recent PS).

not "nomodeset"
"nogpumanager"

I've NEVER seen "nomodeset" help on this issue, it seems to be more about "don't reset the boot graphics mode when you LIKE the mode you boot in".

Innosilicon - once they actually start shipping the A4.

 Avalon - if and when they actually release the A7 and start shipping it.

 Bitmain has just been taking advantage of a TEMPORARY "no significant competiton" timeframe.

 If Hawaii is the R9 290x, it's not a great choice for Ethereum anyway - more power draw, for no better results than the R9 290 manages.

Wait for dealers like ZoomHash to start selling them, or work with other folks in the "group deal" about a combined order.

GTX 1070 works with CUDA 7.5 version of Genoil and a CUDA 5.x version of QTMiner

 You have it backwards - you can't run CUDA 8 code on anything LESS than a GTX 1xxx card, but the GTX 1xxx cards CAN run older CUDA code - abet they usually won't be as well optimised for it as for more recent code that takes advantage of their new features.

 Which does NOT always work - the disable it in grub HAS always worked for me.


 I've tried to get my A10 APUs to work with Ethereum - but trying to allocate 2GB to them in the MB BIOS settings has always caused the MB to crash during boot in EVERY motherboard model I've been able to try it in (a couple of my older ones don't even offer the option).
 IMO it's a good thing I have other uses for them - I suspect the hashrate with DDR3 would be sad compared even to a 2GB HD7750 with the SAME number of shaders but much faster DDR5 for RAM.

 You'll have to do some digging, some of the links are outdated that I found when I was looking for them.
 I don't have the URL where I found them in WORKING form around any more - think it was from the ETH forum.

 They are intended to work well with ANY miner - were originally built during Litecoin GPU days, I'm used them with qtminer and genoil with no issues and see no reason they wouldn't work well with Claymore.

 The parts of the card they turn off are only used for video output stuff - don't use one of these BIOS on a card used for gaming, the performance WILL suffer.

The older numbers were overoptimistic estimates before they had a chance to actually settle down and work with a significant number of chips - *AND* seem to have been based at least in part on using an A2/Dragon sized miner machine with more and larger boards in it.

 If you look at the SIZE spec on the final A4 as announced, it's less than half the size - even accounting for space savings of the power supply in the A2, the A4 is STILL ballpark less than half the size.

12 pc = 12 pieces AKA 12 S9 miners, in context.

 I'm pretty sure they would work with non-reference cards, but don't actually HAVE any to try that with.

R4 at same price, current 11.85 S9 batch selling for LESS than the R4.

 Is BitMain ever going to get a bloody CLUE?

 ETH doesn't need a lot of CPU support - an older Sempron 145 SINGLE core was handling my 3x R9 290 rig with no issues (other than slightly slow DAG creation time, but no noticeable hashrate issues).
 Only reason I eventually put my X240 dual-core in that machine was that it didn't have a home any more - but that rig might get the Sempron back shortly so I can move the X240 into a machine I'm getting ready to build for F@H usage (which DOES require more CPU support).

 ANY semi-current multi-core CPU should handle a 6 card rig easily on ETH - and from what I've seen, XMR isn't noticeably different on needing CPU support, folks just put good CPUs in their XMR rigs for the significant added hashrate.

 Some of the current Skylake Intel multi-core CPUs should be able to generate some noticeable XMS hash, while being under-70 watt parts.

Redundant, with the various TheStilt BIOS versions for those cards around.

 His BIOS versions don't just set the voltage, they also turn off some of the parts of the cards that aren't needed for mining, AND tighten up the memory timings a LOT making them a ton more efficient AND much more overclockable with LESS heat.

 Depends on your setup - I've got a couple machines that were built to fold, and RIGHT NOW I'm making more on CURE than they were making on ETH.

 For more common AMD builds, forget CURE - even the RX480 or R9 290 don't do anywhere near enough PPD to come close on CURE to what they can make on ETH.

 GRC pumped a lot too - but all 3 are sliding back down again and GRC doesn't seem to be profitable for anyone on ANY configuration even with the pump, it's just a way to help pay the electric if you're doing certain BOINC projects ANYWAY.

 (edit - did a calculation based on my 3x R9 290 rig - and WITH the pump it actually WOULD be profitable on GRC - to the tune of less than 50 cents/day vs appx a dollar/day used for electric).


 Now if NewEgg would get off the dime and get the bloody hard drive shipped for the new machine I got all the OTHER parts for Friday.....


 (edit - Even with CURE dropping back towards recent stable pricing, my high-end F@H rigs are more profitable on it right now than on ETH - but my older multi-960 rig is about a tossup, and my multi-950 rig is getting switched back over to ETH or possibly to XMR later today.)