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Best Method To Overclock a 1080 Ti Under Water, No Shunt Mod. Good Under Air Too, Lower Temps.

post #1 of 57
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Do this first.

http://www.overclock.net/t/1625653/how-to-get-voltage-slider-in-afterburner-working-on-a-1080-ti/0_20

After you do this drag voltage and power slider to max, Core Voltage +100%, Power Limit 120%.

Also if you are getting 'Display driver has stopped responding' do below. It works for Windows 7 to Windows 10.

https://support.microsoft.com/en-us/help/2665946/-display-driver-stopped-responding-and-has-recovered-error-in-windows-7-or-windows-vista

Before you start running Heaven do the bolded settings in Nvidia control panel, it'll make your overclock more stable. Also in any game use Single Display Performance Mode and Prefer Max Performance, your games will be more stable with your overclock and have a more constant FPS. Apparently Optimise For Compute Perfmanace helps constant frame rates as well.





Next you want to CTRL F in Afterburner, open the custom voltage curve, CTRL D to set it to defaults. Then you want to hold Shift, drag it to say +145 1999 core at 1050v and hit apply in Afterburner

It'll run around 1999 core at 1.062v in Afterburner in Heaven. Don't run Heaven though, drag the 1031v point up without holding Shift to the same as the 1050v point and hit apply.

If you do it right everything to the right of 1031v should be in a straight line.

Try lower voltages if you are on an air cooler and want to keep temps down, though you may need to start with lower clock speeds as well.

Keep your memory between +400 and +500 to start even if you can do more.

Crappy video I made how to actually do the custom voltage curve. redface.gif

It's how to do a 1.093v voltage curve, to do 1.031v you need it to look like the voltage curve picture farther down this guide.. Since I flashed the Strix BIOS on my FE I'm getting 2100 at 1.093v with no throttling. thumb.gif

Open Heaven at a lower resolution than your screen resolution NOT in full-screen mode so you can still see Afterburner.

When you run Heaven if you get no driver crashes or screen freezing about three seconds and restarting that's good. Now raise the 1031v point with Heaven running one notch at a time to high core speeds like from +145 to +155 and hit apply, then between each time wait 30 seconds or so.

Keep doing this until the driver crashes or screen freezes three seconds and Heaven restarts. Close Heaven then drop in back down one notch, hit apply, and reboot. Your frame rate and stability will be compromised until you reboot.

Now do a full benchmark run with Heaven. If nothing crashes core is good. If driver crashes or screen freezes just drop it down one more notch. At 1.031v max core you can get you should get zero drops in voltages and core speed, should stay at 1.031v and the core it's at.

You can have GPU-Z running and logging to see your core does not drop during the run and be sure you had no driver crashes. If core and volts drop drastically a few seconds, then resumes, your driver crashed.

Ideally, this is what your final voltage curve should look like, but with the maximum core you determine by this method.
After you get best voltages with maximum clocks drag each point in your voltage curve without holding Shift until it looks similar to this.



After you get core stable run Heaven and hit Shift to pause it at a scene. It'll show the frame rate up top with screen paused. Stop it at a lower frame rate scene when the frame rate only fluctuates a few FPS while paused, usually a scene with no clouds or smoke or anything.

Now adjust your memory up/or down until you get the frame rate as high as it'll go with no driver crashes or artifacts. HIGHER ISN"T ALWAYS BETTER. I find at +642 is a few frames slower than +610.

Your frame rate may only be higher a few FPS at best memory speed but that's fine.

You have now found a low voltage best clock speed compromise for your water/air cooled 1080 Ti. biggrin.gif



Being obsessive about these things, I've found under water, no shunt mod, voltage slider maxed out, the trick is to find the best clock speeds you can obtain at the lowest possible voltages for sustained voltages and core speeds. drool.gif

If I run my core at +177 2062 at 1.031v I get a solid 1.031v and 2062 core on a full 1920x1080 Heaven run. This is the lowest I can go on voltages with zero driver crashes at +177 core. drunken.gif

If you look at my GPU-Z log and Afterburner logs not once did I dip below 1.031v or 2062 core. thumb.gif

GPU-ZSensorLog.txt 91k .txt file

HardwareMonitoring.zip 3k .zip file

With 2093 core 1.093v it bounced up and down from 1.050v to 1.093v and in between, clock speeds changing as it does of course. ph34r-smiley.gif

So while you can brag about maximum clocks (I got 2100 benching) for every day 24/7 scenarios a balance between voltages and clock speed seems to be key. cheers.gif

Hope this helps some. I'm reluctant to do the shunt mod as in my case my video card sits vertical and I'm not going to have the CLU run under my EK block and ruin my card. redface.gif
Edited by KedarWolf - 4/20/17 at 7:02pm
    
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post #2 of 57
Awesome write-up man! Adding this to my research doc for when my FTW3 arrives!
post #3 of 57
Yup good job!! gonna do now. Stinks I cant get both cards on one curve I have to do for each, but i'll know each cards potential and daily safe zone. thumb.gifthumb.gif
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post #4 of 57
Thread Starter 
Quote:
Originally Posted by Jbravo33 View Post

Yup good job!! gonna do now. Stinks I cant get both cards on one curve I have to do for each, but i'll know each cards potential and daily safe zone. thumb.gifthumb.gif

Doing them each individually is the way to go for sure. smile.gif
    
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post #5 of 57
Quote:
Originally Posted by KedarWolf View Post

@KedarWolf

Nice guide but I have a few questions

So there is no need to put voltage at 100%, Power at 120% and Temp at 90c before hitting ctrl+f?

Also at 1050mV +101 gets me to 1999, not +145 as you have stated above. I wonder why my FE is different?

Edit: Also once I raise the 1031mV is appears to raise my 1050mV and on values automatically.
Edited by joder - 4/2/17 at 12:54pm
post #6 of 57
Thread Starter 
Quote:
Originally Posted by joder View Post

Quote:
Originally Posted by KedarWolf View Post

@KedarWolf

Nice guide but I have a few questions

So there is no need to put voltage at 100%, Power at 120% and Temp at 90c before hitting ctrl+f?

Also at 1050mV +101 gets me to 1999, not +145 as you have stated above. I wonder why my FE is different?

Edit: Also once I raise the 1031mV is appears to raise my 1050mV and on values automatically.

Yes, max out sliders first.

Not sure why yours is different though. redface.gif

And yes, it'll go the the lowest voltage the slider is at at the top line. If you see my voltage curve 1031v at as high as I have it and everything to the right is a straight line. It'll top out at 1.031v in Afterburner though but if you run Heaven in a window with Afterburner open you can see your clocks and voltages.

Sometimes the curve is a bit off but you can adjust it on the fly in Afterburner with Heaven running to get it right. smile.gif
Edited by KedarWolf - 4/2/17 at 1:01pm
    
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post #7 of 57
Quote:
Originally Posted by KedarWolf View Post

Doing them each individually is the way to go for sure. smile.gif
Quote:
Originally Posted by KedarWolf View Post

Yes, max out sliders first.

Not sure why yours is different though. redface.gif

And yes, it'll go the the lowest voltage the slider is at at the top line. If you see my voltage curve 1031v at as high as I have it and everything to the right is a straight line. It'll top out at 1.031v in Afterburner though but if you run Heaven in a window with Afterburner open you can see your clocks and voltages.

Sometimes the curve is a bit off but you can adjust it on the fly in Afterburner with Heaven running to get it right. smile.gif

Thank you for the clarification.

Yeah my afterburner acts sort of weird... I am running 4.3.0. The curve sometimes will show a jump in OC (+165 to +175) when I manually change it, but the clock on the left hand side will stay at 2050 for instance.

I noticed I couldn't get to 2062 @ 1031... I also noticed it happened right when the card hit 50C. I wonder if this is coincidental or not. I just did a successful run at 2050 @ 1031.

Edit: are you holding shift as you continue to raise your 1031 point? I ask as I notice that there is a big cliff down from 1031mV to 1025mV and not a smooth transition in Frequency like you have in your screenshot above.
Edited by joder - 4/2/17 at 1:32pm
post #8 of 57
Quote:
Originally Posted by KedarWolf View Post

Doing them each individually is the way to go for sure. smile.gif

i have to wire the second gpu to the monitor correct? i can obviously do this method to the top card which i have done already after disabling sli. but to monitor and do the second card im a little confused cuz my monitor is plugged to my first.
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post #9 of 57
Thread Starter 
Quote:
Originally Posted by joder View Post

Quote:
Originally Posted by KedarWolf View Post

Doing them each individually is the way to go for sure. smile.gif
Quote:
Originally Posted by KedarWolf View Post

Yes, max out sliders first.

Not sure why yours is different though. redface.gif

And yes, it'll go the the lowest voltage the slider is at at the top line. If you see my voltage curve 1031v at as high as I have it and everything to the right is a straight line. It'll top out at 1.031v in Afterburner though but if you run Heaven in a window with Afterburner open you can see your clocks and voltages.

Sometimes the curve is a bit off but you can adjust it on the fly in Afterburner with Heaven running to get it right. smile.gif

Thank you for the clarification.

Yeah my afterburner acts sort of weird... I am running 4.3.0. The curve sometimes will show a jump in OC (+165 to +175) when I manually change it, but the clock on the left hand side will stay at 2050 for instance.

I noticed I couldn't get to 2062 @ 1031... I also noticed it happened right when the card hit 50C. I wonder if this is coincidental or not. I just did a successful run at 2050 @ 1031.

Edit: are you holding shift as you continue to raise your 1031 point? I ask as I notice that there is a big cliff down from 1031mV to 1025mV and not a smooth transition in Frequency like you have in your screenshot above.

No, after you raise your whole curve using Shift you individually drag each point. Adjust it on the fly with Heaven running, you may need to drag it a bit higher without holding Shift to get it to 2062.

After I get max core at 1.031v I manually adjust each point for an even curve.

Edit: And it seems like it does throttle once it gets above 50c, why I have my pump at 75%.
    
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post #10 of 57
Thread Starter 
Quote:
Originally Posted by Jbravo33 View Post

Quote:
Originally Posted by KedarWolf View Post

Doing them each individually is the way to go for sure. smile.gif

i have to wire the second gpu to the monitor correct? i can obviously do this method to the top card which i have done already after disabling sli. but to monitor and do the second card im a little confused cuz my monitor is plugged to my first.

No, in Afterburner you have Sync off, leave SLI on, and in Afterburner choose the first card, adjust the core and ram, than choose the second card, adjust the core and ram.

Uncheck here.



Do each card individually here with SLI on. Choose Card 1 first, then do Card 2 second.


Edited by KedarWolf - 4/2/17 at 2:44pm
    
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