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Q. About 1080Ti overclocking.

r7slayer

r7slayer

r7slayer

Soldato
Joined
2 Oct 2012
Posts
3,246
Hey guys.

I'm looking at adding my 1080Ti to my custom loop at some point. However i aiming this question specifically at people who have overclocked their 1080Ti and most likley have it under water or a AIO solution.


When up around the 2Ghz + mark do you often find it still throttles down? Iv'e seen a lot of people on the net even under water say it still throttles and reason being is it's still hitting that power limit even at 120%. This seems to be knocking the frequency down to 1950~Mhz for some people

Now if that's the case i'm seriously going to consider doing the shunt mod with some various precautions

Going to use clear nail varnish gloss stuff to put around the solder points and the area of the two shunts i will be shorting then using a glue gun to make sure the liquid metal does not go anywhere. This should provide added protection and if needs be very easily reversible. Iv'e seen lots of people just add Liquid metal and get a good 30% drop in the power limit which is more than enough.

I just don't want to go to this extreme if its only going to warrant a possible 50-70Mhz extra overclock stable.

If i do go down this route after serious consideration i will post my findings etc just incase anyone else is considering it. I guess AIB cards wont have this power limit problem though as they will have hardware level modifications to nVidias design that overcome this. However then there is the Voltage problem lol.
 
1080Ti as the 1080 also, are power limited to 1.093v and due to the tech limitations thermal throttling starts from 32C.

So your target is not to hit 32C. If it does, then I would advice you to replace the thermal paste on the GPU with Thermal Grizzly Conductonaut (Liquid Metal), which is far safer than CLU. Raise fan speeds or add more rads. Imho a XE 480 with 4 Vardars at 80% should cut it if you want advice on that.
 
I'm at +160 which gives me 2083 initially and then 2050mhz when up to temp but with no throttling due to power - MCW82 gpu core only block with a copper spacer, stock shroud for VRM's etc.

I also have +500 on memory and the most i have seen is 118%, which is close but not throttling for me
 
Interesting and thanks andy. Im happy as long as i can hold 2050 stable. Would like to get close to 2100 but i feel thats optimistic.
Ive seen mine hit 110-120 in stress test such as 3dmark which is why im initially asking. Even saw it hit 122% which was just a breif second. I think it needs to but up there for longer for it to throttle but it just makes me think its going to be more power limited rather than voltage limited and certainly not thermal limited.
 
If you can keep it below 32c and perform the shunt mod then 2100mhz stable should be possible unless you get a poor chip.

You seem to know what you're doing with the mod as I've seen some people do it in ways that aren't reversible which is just madness on a brand new card at the higher end of pricing.
 
Mine sits at 2050Mhz with no drop in clock speed, at least not that I have noticed.

Max clock speed I have had is 2076Mhz and it doesn't seem to want to go higher.
 
Ayahuasca said:
If you can keep it below 32c and perform the shunt mod then 2100mhz stable should be possible unless you get a poor chip.

You seem to know what you're doing with the mod as I've seen some people do it in ways that aren't reversible which is just madness on a brand new card at the higher end of pricing.
Click to expand...
Thats what im hoping. To get around there. It seems as long as you only put the liquid metal on the top of the shunt so it touches both sides where the metal show, it should lower the resistance. But gotta make sure it does not touch the solder. Thermal grizzly liquid metal does not eat solder afaik. Cool labs apparently can do. But as long as i use nail varnish which comes off with alcohol rub and using a glue gun isolate the two shunts it should prevent it from going anywhere. The glue will just peel off and liquid metal will wipe off. So should be reversible.

I think im going to go
ahead with this mod. Ill just be voltage limited after.
 
Mean Mr Mustard said:
I have mine under water and it throttles down under full load. Temperatures are around the 50-55c level at full load, core clock fluctuates between 1920 and 2000 mhz.
Click to expand...
Yea seems you may be hitting the power limit of the card. Its what ive seen other people report. Starts throttling at 32 degrees and every 10 degrees more it drops 13mhz. So you should only be seeing at 26mhz drop at those temps
 
Under water I tend to max out at around 40-42c with heavy GPU games.
This gives me 2080mhz providing I have vsync disabled. If limited to 144mhz then card tends not to go above 36-38c
When limited to 144mhz the card is down to 1900mhz purely because it does not need to perform any better.
 
Robzere31 said:
Under water I tend to max out at around 40-42c with heavy GPU games.
This gives me 2080mhz providing I have vsync disabled. If limited to 144mhz then card tends not to go above 36-38c
When limited to 144mhz the card is down to 1900mhz purely because it does not need to perform any better.
Click to expand...

If you fully utilise your card in a game where its at 99% load you may see it throttle. Not because of temps but power usages aka power limit. You can raise it to 120% but a lot like me hit this thus card throttles. Some people dont notice it but if you actually watch your card frequency like i do on a second monitor with hardware monitor you will see it throttle.

Its how gpu boost 3.0 works.
 
Of course which I've referred to above, but this isn't going to net you much more than about 50mhz if you're lucky and when doing mods like that there's always a risk of bricking your card and making it ineligible for RMA.

For example, you can short it too much that'll it make the card go into a permanent fail safe mode and run at really low clockspeeds.
 
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Ayahuasca said:
Of course which I've referred to above, but this isn't going to net you much more than about 50mhz if you're lucky.
Click to expand...

Yes but there are benefits to doing it ;) less power fluctuations and better frame times and more stable clock with less to no movement in core clocks.
 
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