Did some testing about a week back under the most recent EBWF version.
 
 All at +100 core +100 memory in afterburner (seems to be the best RELIABLE spot in Afterburner, +150 core worked better but wasn't long-term reilable) on a Aorus (not the extreme) on a Windows 7 machine with 382.53 drivers.
 
 No undervolting (haven't gotten it to WORK on my 1080ti yet).
 
 125 watt TDP (50%) = 505 Sol/sec
 150 watt TDP (60%) = 620 Sol/sec
 175 watt TDP (70%) = 680 Sol/sec
 200 watt TDP (80%) = 725 Sol/sec
 225 watt TDP (90%) = 760 Sol/Sec
 250 watt TDP (100%) = 780 Sol/Sec
 
 My 175 and 200 watt TDP-limited figures are very close to your undervolted similar wattage figures via undervolting - I suspect we're ending up at close to the same voltage due to TDP limiting.
 The power figures I saw were what Nvidia-SMI reported, the actual figure and hashrate bounced around a bit like on any mining.
 
 I'm curious WHICH model of 1080ti you pushed past 300 watts power draw and what you used to estimate it with, as well as which driver version and OS you were using.
 

QuintLeo
 I'm curious WHICH model of 1080ti you pushed past 300 watts power draw and what you used to estimate it with, as well as which driver version and OS you were using.
 

This Palit Gamerock Premium 1080ti has 2x 8pin with a 350W power limit, the measurement is from wall minus the idle consumption (70-80W)of the system, the driver used was 385.69 WHQL and OS is Win10.
The PSU efficiency is 90% @ 50% load.
 
In Timespy Extreme Graphics Test 2 gpu voltage drops to a minimum of 1000mV with the 350W limit.
Now I'm using Asus XOC bios so I have eliminated any power limits and the peak power draw from wall with 1100mV is 490W(- idle load) so the PC actually uses 440W with the 90% efficiency, the GPU peaks @ 420W as estimated by Hwinfo. I'm using custom 120mm high pressure fans on the heatsink so temps are never a problem.
 
The closest estimation of the actual GPU power peak is (490W-idle consumption 80W) * 90% = 369W
 

With 1080ti it's pretty safe to crossflash BIOS.
 
The only known softbrick is if you flash a HOF or Lightning BIOS that uses 3x 8pin.
Then you need a spare graphics card or iGPU to restore the original BIOS.
 
Also my Palit card has a bios switch similar to FTW3 if all else fails :)

Both 

QuintLeo
 In theory that allows for up to 375 watts without exceeding PCI-E specs for power....
 

 
The spec is overprotective :)
Normal 18awg 6pin (2-3x 12V yellow lines, most PSUs got 3) can easily do 12V*8A*2= 192 watts without heating and 8pin 12V*8A*3= 288 watts
 
Some PSUs have 16awg which can do safely even more.

The spec IS massively overprotective - the actual 6-pin connector used by the PCI-E spec is rated at 8 amps continuous per pin (13 amps free-air max per pin but that is derated some for heat retention by the connector), or 24 amps (3 +12VDC and 3 ground) = 288 watts at 12VDC per connector, so there is ZERO derating required for 24/7 continuous operation as the connector is ALREADY derated to barely over 25% of it's actual rated power capacity by the PCI-E spec (75 Watts per PCI-E).
 If they are only using 2 of the designated +12VDC pins for power (and the other for sense), that's 16 amps or 192 watts which STILL leaves the connector at well under 40% of it's rated capacity.
 
The PCI-E 8-pin connector spec still only uses 3 of the pins for +12VDC which STILL leaves the connector at barely over 50% of it's rated power capacity (150 watts  per PCI-E)
 
 WIRING, on the other hand, needs to be watched at derated capacity in 24/7 usage as many power supply makers cheap out a bit on that and push it a LOT closer to it's actual specs (PCI-E doesn't specify the wiring size AFAIK).
 
 While the wire used by some power supplies is 16 AWG, that's normally used on 2-connector lead sets not just on singles and you have to watch what the rated draw is from BOTH connectors - and 16 AWG is only rated for 10 amps max anyway, or 8 amps for continuous usage.
 
 

that is basically the same thing just with a different metric. lowering the power target will in turn lower the max voltage to limit the max power.

Lowering the target TDP does work to improve efficiency - and is more widely available than direct undervolting (LINUX has power limit control, but I've yet to find a way to set undervolting in software under LINUX).
 
 In my testing with my Aorus GTX 1080 ti (and later spot checking with my Gigabyte and EVGA 1080 ti cards), it seems that pretty much any 1080 ti is capable of a bit over 4 efficiency using EBWF at +100 core +100 memory and TDP set to around 60% (150 watts) - but hashrate starts dropping fast much lower than that, and by the time you get to 125 watts (50% TDP) the efficiency starts DROPPING again because the core clock is getting severely power starved.
 
 I'm not claming this as the ultimate efficiency setup as I've not played with the 1080 ti as much as my 1070 ti cards, but I suspect it's fairly close.
 
 Boost clock has quite a few factors that go into it - it's the CARD that decides how high it can boost, the published figures you see for cards is a specified MINIMUM that any card of that model should be able to achieve on stock settings and pretty much ALL cards will be able to exceed that spec. How far a specific card will go depends a lot on the so-called "silicon lottery", which is a way of saying "how few flaws the wafer had in the area that your particular GPU came out of".
 

The factory rated "boost clock" for a card model is a guarentee that the card will get AT LEAST that high on boost clock, most will do better and some quite a bit better.
It also depends on the type of workload - some types like ZEC mining load a card down more than FAH or ETH mining or Dnet RC5-72 work (FAH loses some GPU loading when it's passing mass data to/from the CPU, ETH is heavy memory limited on most cards, DNet is entirely core limited and barely touches memory at all).
 
 
 

Does anybody know if cryptocurrency mining voids the 5years and 10years extended warranty from EVGA?
Just purchased 3x1080ti because the vendor assured me it covers mining since you keep it original and don't OC.
Thanks

igoricom
Does anybody know if cryptocurrency mining voids the 5years and 10years extended warranty from EVGA?
Just purchased 3x1080ti because the vendor assured me it covers mining since you keep it original and don't OC.
Thanks

99% of the time, OC'ing your card makes no sense for mining. you want to underclock, not overclock.