I undervolted my GTX 1080 to 0.7V - Results

[Tech Wizard]

Posted it on overclocking subreddit originally - 

 

 

 

TL;DR: Making Pascal super efficient

 

Undervolted my Gigabyte Windforce 1080 to static 700mV, which resulted in a maximum stable frequency of 1506MHz (also static). This undervolt halfed power consumption from most aftermarket 1080's 200W, down to 100W (20W less than a 1060). Not bad full load temps for an air-cooled card after a 20 minute Fire Strike loop.

Also did a normal Fire Strike run for a GPU score of 18 685, with underclocked core (1506MHz / stock mem).

 

Also quickly checked what the highest frequencies I could achieve with 750mV & 875mV out of curiosity, and the card could achieve 1633MHz & 1898MHz with those voltages.

 

https://imgur.com/a/2SO8UEe

 

[Livinloud]

When I get home i'll use my 1080ti and undervolt it and post my results for you. Though mine is watercooled and probably sitting at 16c atm.

[Livinloud]

Ok I don't have picture or the watts because I was using my phone to screen shot while using it remotely you can't see it at all...but on MSI I put the slider down to 50% it used average 725mV at 25c running 1047mhz core and 5500mhz memory for a score of 21432 on graphics score..that just doesn't seem right lol.

 

Ok suppose it is correct. Normal speed no OC score of 28450 with temp max at 38c. drawing 1025mV

[Mick Naughty]

Stock with a reference board. 

 

Lowering voltage would heavily limit the card if it were to run at 1500 compared to 1900 or so. No gain if the fans are still at 100. Can do the same thing with an fe card and boost higher. 

[xg32]

3 hours ago, Tech Wizard said:

.

nice one, i personally just adjust with the power limit, at its lowest it can do 1350mhz with the fans off, 1750mhz 200w is pretty good too

[X_X]

@Tech Wizard Curious, if trying to save power then why the fixed voltage and clock, why not let them drop down when idle?

 

FWIW my 1050Ti does 1400 GPU clock at 0.7V (0.84V using multimeter) and crashes at 1500 so your doing a whole lot better than me

 

At 1400 Heaven shows 68W using GPU-z but 50W using nvsmi and Hwinfo. I think GPU-z is calculating it using the TDP % and default power which leads to incorrect results when default power is changed - bug. Not sure it really matters in this case as nvidia has said 1050Ti power readings are crap, so much so that they removed them from the latest drivers.

 

 

[Tech Wizard]

7 hours ago, X_X said:

@Tech Wizard Curious, if trying to save power then why the fixed voltage and clock, why not let them drop down when idle?

 

FWIW my 1050Ti does 1400 GPU clock at 0.7V (0.84V using multimeter) and crashes at 1500 so your doing a whole lot better than me

That undervolt was under load. When idling it's sitting at 139MHz / 0.6V