Stress Test Overiadding Overclock

[King_Gamma]

Hey guys,

I have been working on over clocking my GTX 780 but when I stress test the card the clock gets nowhere near the parameter I set. But when I run a game it reaches the overclocked base clock.

Does anyone know what's happening?

Thanks for your input!

[Grrizz]

Hey guys,

I have been working on over clocking my GTX 780 but when I stress test the card the clock gets nowhere near the parameter I set. But when I run a game it reaches the overclocked base clock.

Does anyone know what's happening?

Thanks for your input!

Its probably hitting the cards power limit, things like Furmark etc. cause the card to draw way more power then normal use e.g. on my GTX970 most games will be <90% (usually <80%) of the power limit but under Furmark it will go all the way up to 118%.

[King_Gamma]

Its probably hitting the cards power limit, things like Furmark etc. cause the card to draw way more power then normal use e.g. on my GTX970 most games will be <90% (usually <80%) of the power limit but under Furmark it will go all the way up to 118%.

Why would the base clock be lower on FurMark than in a game?

[Grrizz]

Why would the base clock be lower on FurMark than in a game?

To keep under the power limit the card will automatically throttle the GPU clock to reduce the cards power draw. You can use software like MSI Afterburner to see if that is what's happening (and increase the limit slightly).

[dragoon20005]

Why would the base clock be lower on FurMark than in a game?

we cant be sure why it does that

 

the clocks shown in Unigine is also not accurate too

 

but please do not use Furmark unless you want a nice GPU cup coaster

[King_Gamma]

To keep under the power limit the card will automatically throttle the GPU clock to reduce the cards power draw.

Is there a stress test that will not do that?

[King_Gamma]

we cant be sure why it does that

 

the clocks shown in Unigine is also not accurate too

 

but please do not use Furmark unless you want a nice GPU cup coaster

I have seen unigine doing the same thing with the base clock

[dragoon20005]

Is there a stress test that will not do that?

my suggestion is to use Unigine Valley or Heaven

 

or FutureMark

 

but use GPU-ZID to measure the speed and load

[Grrizz]

Is there a stress test that will not do that?

Things like 3DMark, Unigine or my favourite Catzilla that stress test in a more true to gaming style shouldn't push the power up as high, Furmark etc. just does it because it basically loads the GPU as heavily as is possible. IRL the best way to test a stable overclock is to try many different games and benchmarks on it because different types of loading can show instabilities even if they aren't the most intense loads like what you get from Furmark and OCCT.

[King_Gamma]

Things like 3DMark and Unigine that stress test in a more true to gaming style shouldn't push the power up as high, Furmark etc. just does it because it basically loads the GPU as heavily as is possible. IRL the best way to test a stable overclock is to try many different games and benchmarks on it because different types of loading can show instabilities even if they aren't the most intense loads like what you get from Furmark and OCCT.

Ok I will try 3DMark, Catzilla and some games. I have seen Unigine doing the same thing.

[Grrizz]

Ok I will try 3DMark, Catzilla and some games. I have seen Unigine doing the same thing.

If you are seeing limiting on Unigine and have increased the power limit as far as it will go there's not much you can do about it without modifying your BIOS, but do use something like Afterburner etc. to check that is in fact what is happening. The raymark test in Catzilla also pushes the power up a fair bit (nowhere near as much as Furmark) so if Unigine is limiting that likely will too.

[King_Gamma]

If you are seeing limiting on Unigine and have increased the power limit as far as it will go there's not much you can do about it without modifying your BIOS, but do use something like Afterburner etc. to check that is in fact what is happening. The raymark test in Catzilla also pushes the power up a fair bit (nowhere near as much as Furmark) so if Unigine is limiting that likely will too.

I have it set a 106% on afterburner.

[Grrizz]

I have it set a 106% on afterburner.

Sweet, just keep an eye on the power limit graph and if it hits 106% you'll know that's what's causing the throttling.

[King_Gamma]

Sweet, just keep an eye on the power limit graph and if it hits 106% you'll know that's what's causing the throttling.

Alright thanks!