How achievable is this Max Overclock

[BRiiTASH]

Im considering pushing my GTX 1080 OC as far as possible. My current OC is +120% max power limit, +144hz clock speed and +140hz memory speed.

 

Ive seen a youtuber push +220hz clock speed and + 500hz memory speed. The catch is the had core voltage at +80%.

 

My current option for that is locked at +0% but im considering unlocking this and setting it to +80% to stabalise the OC.

 

My question is, are there any risks/dangers pushing the core voltage to that level. I havent touched core voltage yet but if it helps attain the Max OC I will do.

 

I have GTX 1080FE but its watercooled with an EK FC1080 and 480mm rad.

[A Silver]

As far as I know it may shorten the life but I am not 100% sure

[Bananasplit_00]

You basically can't hurt your GPU with the default bios, just crank it if you want

[Gamerguy207]

Did the YouTube have any special cooler on there gpu or no. Second you could try his overclock but not as intense ( voltage, clock, etc) and make baby steps to the overclock if you want and test stability 

[BRiiTASH]

8 minutes ago, A Silver said:

As far as I know it may shorten the life but I am not 100% sure

Im only keeping it till Volta is announced anyway.

[A Silver]

Just now, BRiiTASH said:

Im only keeping it till Volta is announced anyway.

Ok, you might as well try it then

[BRiiTASH]

5 minutes ago, Gamerguy207 said:

Did the YouTube have any special cooler on there gpu or no. Second you could try his overclock but not as intense ( voltage, clock, etc) and make baby steps to the overclock if you want and test stability 

He used an AIO Corsair H95 i think, that was all.

[Cookybiscuit]

Pascal doesn't really overclock very well anyway, you can increase the clocks but after a point it'll stop giving you any performance benefit, it may even make it worse as I gather they added some kind of error correction algorithm rather than let it crash or produce artifacts. You'll also probably find in reality your card is running way above the advertised clock speed, so overclocking it any further might be hard. That said, you can't really damage modern Nvidia cards by overclocking them, so just try it and see what happens, just keep bumping up the clocks and see what happens.

 

Once you've figured out what its max stable clock is you might try undervolting it too. Your mileage may vary but on my 1080Ti it'll do exactly the same 2000Mhz at 1.012v as it does whatever the max allowed by the BIOS is, I have no idea how that works or why, I think they just hit a wall and after a certain point more voltage doesn't help. If you Google it, undervolting is a pretty common thing for people to do on Pascal, it'll let it run quieter and at the same speed.

[Vellinious]

20 minutes ago, Cookybiscuit said:

Pascal doesn't really overclock very well anyway, you can increase the clocks but after a point it'll stop giving you any performance benefit, it may even make it worse as I gather they added some kind of error correction algorithm rather than let it crash or produce artifacts. You'll also probably find in reality your card is running way above the advertised clock speed, so overclocking it any further might be hard. That said, you can't really damage modern Nvidia cards by overclocking them, so just try it and see what happens, just keep bumping up the clocks and see what happens.

 

Once you've figured out what its max stable clock is you might try undervolting it too. Your mileage may vary but on my 1080Ti it'll do exactly the same 2000Mhz at 1.012v as it does whatever the max allowed by the BIOS is, I have no idea how that works or why, I think they just hit a wall and after a certain point more voltage doesn't help. If you Google it, undervolting is a pretty common thing for people to do on Pascal, it'll let it run quieter and at the same speed.

At a certain point, the clock increases will stop giving performance benefits because the GPU is running too warm.  For instance, a GPU that runs very well with the core at 2100 @ 60c, will perform better at 20c.  Likewise, pushing the core clock higher with warmer temps won't yield but marginal results, if any at all, as opposed to doing the same thing with the core temps very low.

It's all about the core temps with Pascal.  The cooler you keep them, the higher they'll be able to boost, and the better they'll run there.


As for the OP.  There's absolutely nothing in the stock bios that's going to allow you to hurt your GPU.  Just remember...the cooler the better.  With the FE model, you'll likely hit the power limit perf cap, long before you find the max overclock of your GPU.
 

[Evolution90]

5ghz is possible if you don't mind using a transformer to power your GPU instead.

[BRiiTASH]

When unlocking my core voltage in msi afterburner it gives me the option to force "constant voltage". I understand this is neccessary for manually OCing a cpu, but is this neccessary for OCing the gpu when applying a core voltage % increase to stabalise the overclock.

[BRiiTASH]

Ok so i didnt realise i was actually running a +240hz on core clock speed anyway and +140 on memory. Im going to test it at +245hz Core clock and +496 memory with +50% core voltage and see what happens.

[Vellinious]

2 hours ago, BRiiTASH said:

Ok so i didnt realise i was actually running a +240hz on core clock speed anyway and +140 on memory. Im going to test it at +245hz Core clock and +496 memory with +50% core voltage and see what happens.

By setting an offset on the core, you're allowing the software to create a frequency / voltage curve for you.  You'd be much better off setting the voltage / frequency curve yourself.

[BRiiTASH]

1 hour ago, Vellinious said:

By setting an offset on the core, you're allowing the software to create a frequency / voltage curve for you.  You'd be much better off setting the voltage / frequency curve yourself.

Honestly no idea how to do that. I can set a custom fan curve but thats about it. Any tips on how to do it afterburner would be appreciated.