Changed 1080 to 1080TI , OC and usage issue

[wsarahan]

Hi guys how are you?

I had an 1080 SLi rig but i`m done with SLI, so many problems with games not optmized..... so i sold both cards and bought a 1080TI, this one:

http://www.gigabyte.us/Graphics-Card/GV-N108TGAMING-OC-11G#kf

Now the big issue that i never saw at my 1080`s

When the card reaches 99% usage the core clocks have a big drop no matter what temp

Example 60C 80% usage 2063 core / 60C 99% usage 2000 core...

How can i fix it?

I use here a 4770k@4.6 and a 2K PG278Q Gsync Monitor

 

[buellersdayoff]

Power limit throttling, minimize it by tuning a custom voltage curve. Or virtually eliminate it with extravagant water cooling system. It's normal and won't cost much performance losing around 50mhz in games

 

[Wall Street]

The reason the 1080 Ti downclocks more than the 1080 is because it has 50% more shaders but only a 39% higher default power limit (250 W vs. 180 W). Many 1080 designs also defaulted to higher than the nVidia stock power limit.

Watercooling won't eliminate the power target. Undervolting can help, but the easiest fix is below.

Open a command prompt as administrator and run the following line:

"C:\Program Files\NVIDIA Corporation\NVSMI\nvidia-smi.exe" -q -d power

You will see a printoff of power limit settings.

Run the following command and in the <newpowerlimit> field you need to enter a number that is higher than Enforced Power Limit but no greater than Max Power Limit. (e.g. for 300.00 watts, enter "300")

"C:\Program Files\NVIDIA Corporation\NVSMI\nvidia-smi.exe" -pl <newpowerlimit>

Now when you rerun the first command again, you will see that the Enforced Power Limit is higher. Please note that the card will now use more power, but will throttle less. nVidia has these power targets because it is easier on your power supply and case cooling to keep the power down. Before power limits, people would kill the VRMs on their cards or their PSUs with programs such a furmark, and this has virtually eliminated that problem.

 

[Wall Street]

Looking at your clock speeds, you probably already have a 100% power target actually. If this is so, the next step is to do a shunt mod. There are small resistors that are a faction of an ohm which shunt each rail of power coming into the card. By lowing the value of these resistors, you can trick the card into thinking it is drawing less power. Most people who do this mod just double up the resistance by soldering matching resistors above the original ones to make the card think it is drawing half of the actual power load.

If this sounds extreme, then you should just get used to the idea that at 100% load you are hitting power limit, and nVidia knows what is good for you (and there partner's RMA departments) so they will not let you exceed that limit.

 

[Ajay]

The reason the 1080 Ti downclocks more than the 1080 is because it has 50% more shaders but only a 39% higher default power limit (250 W vs. 180 W). Many 1080 designs also defaulted to higher than the nVidia stock power limit.

Watercooling won't eliminate the power target. Undervolting can help, but the easiest fix is below.

Open a command prompt as administrator and run the following line:

"C:\Program Files\NVIDIA Corporation\NVSMI\nvidia-smi.exe" -q -d power

Decided to take a look at that for my 1070 (obviously, not to set power limit to 300W), but there is no NVSMI directory.
Any ideas? TIA!

Edit: Duh, had to navigate there manually instead of cut and paste

 

[wsarahan]

The reason the 1080 Ti downclocks more than the 1080 is because it has 50% more shaders but only a 39% higher default power limit (250 W vs. 180 W). Many 1080 designs also defaulted to higher than the nVidia stock power limit.

Watercooling won't eliminate the power target. Undervolting can help, but the easiest fix is below.

Open a command prompt as administrator and run the following line:

"C:\Program Files\NVIDIA Corporation\NVSMI\nvidia-smi.exe" -q -d power

You will see a printoff of power limit settings.

Run the following command and in the <newpowerlimit> field you need to enter a number that is higher than Enforced Power Limit but no greater than Max Power Limit. (e.g. for 300.00 watts, enter "300")

"C:\Program Files\NVIDIA Corporation\NVSMI\nvidia-smi.exe" -pl <newpowerlimit>

Now when you rerun the first command again, you will see that the Enforced Power Limit is higher. Please note that the card will now use more power, but will throttle less. nVidia has these power targets because it is easier on your power supply and case cooling to keep the power down. Before power limits, people would kill the VRMs on their cards or their PSUs with programs such a furmark, and this has virtually eliminated that problem.

Guys, you are all amazing, the power limit is the issue

@Wall Street the enforce power limit is already the same as the maximum when i runned the first command, what should i do now?

 

[wsarahan]

Power limit throttling, minimize it by tuning a custom voltage curve. Or virtually eliminate it with extravagant water cooling system. It's normal and won't cost much performance losing around 50mhz in games

I never learned how to use custom curve OC in this cards, i use the old bar method, all the tutorials are in english and mine is not so good, i live in Brazil

 

[buellersdayoff]

Just to clarify, I meant minimize the down clocking.

 

[wsarahan]

Just to clarify, I meant minimize the down clocking.

No idea to do the curve without mess everything, the stable now for me is this:

 

[Wall Street]

Here are two videos describing the shunt mod to increase power limit:
https://www.youtube.com/watch?v=v1Qi8fxIi_Y
https://www.youtube.com/watch?v=v1Qi8fxIi_Y

https://www.youtube.com/watch?v=dSCNf9DIBGE

Here is a thread on doing a shunt mod with CLU thermal material rather than resistors:
http://www.overclock.net/t/1608437/...nt-mod-for-titan-x-and-many-other-nvidia-gpus
http://www.overclock.net/t/1608437/...nt-mod-for-titan-x-and-many-other-nvidia-gpus

I am not responsible if you kill your GPU ...

 

[wsarahan]

Here are two videos describing the shunt mod to increase power limit:
https://www.youtube.com/watch?v=v1Qi8fxIi_Y

https://www.youtube.com/watch?v=dSCNf9DIBGE

Here is a thread on doing a shunt mod with CLU thermal material rather than resistors:
http://www.overclock.net/t/1608437/...nt-mod-for-titan-x-and-many-other-nvidia-gpus

I am not responsible if you kill your GPU ...

I don`t have courage to to that kkkkk

If i try the OC curve what should i do? My defayult curve is like that now, how should i let this curve?

 

[buellersdayoff]

http://www.overclock.net/t/1601288/official-nvidia-gtx-1080-owners-club
Have a look there.
And the first page of the 1080ti thread where there is tips for over clocking http://www.overclock.net/t/1624521/nvidia-gtx-1080-ti-owners-club

 

[wsarahan]

http://www.overclock.net/t/1601288/official-nvidia-gtx-1080-owners-club
Have a look there.
And the first page of the 1080ti thread where there is tips for over clocking http://www.overclock.net/t/1624521/nvidia-gtx-1080-ti-owners-club

Thanks

But i can`t understand this curve method, i maybe be very stupid to not get the curve point

 

[buellersdayoff]

It is quite tricky, the 1080ti thread has some info for tuning the curve. The short version is to find what voltage you need for what clock speed (gpuz has data logging) then manually set those on the curve. Example - Assuming stock voltage you have around 2063, first bump up the offset to approximately +50 then open the curve and slide up the points from 1025 (1.025v) onward to 2076. These values may or may not work for your card, its up to you to find out what works best. You could run a benchmark eg unigine heaven, firestrike, in windowed mode and make minor adjustments on the fly.

 

[Charlie22911]

I did the shunt mod to both of my open loop 1080s, it actually has a suprising positive impact on frametimes.

I'm a bit hesitant to recomend using "liquid metal" due to it possibly alloying with the solder and causing issues, I used a conductive pen instead.

Note that directly soldering across the resistor will cause it to run in 2D mode however.

 

[ZGR]

Regarding the Power Limit issue: If you drag the Power Limit % slider on EVGA Precision or MSI Afterburner and hit Apply, it will overwrite your settings that you change via nvidia-smi.exe. 50% is 115W and 126% is 289W. Not sure if the MSI 1080 ti also supports 126% power limit boost.

Also @ OP. Expect your OC to be around 50 MHz slower in games due to your GPU warming up. My OC in my signature is actually 2114 Mhz or something like that but in reality it is 2050 Mhz base and 2063 boost in game. I would try to aim for something like that where your expectations are about 50 MHz lower unless you like maximum fan speed.