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More Core Clock = Less Points in 3D Heaven - Page 2

post #11 of 25
Thread Starter 
Quote:
Originally Posted by Fulvin View Post

Throttling causes the core clock to drop under load, which you can see in the GPU-Z graph or using Afterburner. If it does not throttle, you should see a nice straight graph showing constant 1200Mhz, or whatever you have it set to.

Have you over volted it? If you have not, then it's very likely that it's downclocking / throttling under load.

Never touch in voltage, i don´t feel confortable with playing with voltages.... I see, what you mean, and i´m almost sure that's what's happening. When i play Far Cry 3, i can see that core clock is not stable, it moves between 1200MHZ - 850MHZ, so i think that´s it ...

So, if i go with more voltage, the objective is to make that line flat at whatever core clock speed i choose, right ??
post #12 of 25
Yes.

And don't be afraid to over volt. Provided your cooling permits, you can safely push it all the way up to 1.3V. You can see in GPU-Z that when the vdroop (voltage drop under load) kicks in the actual voltage will be much less than what you typed in.
post #13 of 25
Thread Starter 
Quote:
Originally Posted by Fulvin View Post

Yes.

And don't be afraid to over volt. Provided your cooling permits, you can safely push it all the way up to 1.3V. You can see in GPU-Z that when the vdroop (voltage drop under load) kicks in the actual voltage will be much less than what you typed in.

So double cheking:

1 - Unlock voltage control in MSI Afterburner ( i have a grey area in voltage setting, that´s normal in the WF3 but i think can edit with notepad to enable voltage control - I think i read something like that ... )
2 - Try to find the sweet core clock just before the trottling begins
3 - raise a little bit in the voltage and then repeat step 2
4 - Repeat step 3 until reach a voltage never higher than 1.3V as long as temperature is acceptable ( Less than 70ºc )

Is that right or something is missing ? Should i raise power control bar to +20 value or keep that at 0 ?

Again, thanks a lot !
post #14 of 25
Might be that your card is voltage locked. I don't use AB myself and I can't tell you how to unlock it.

Once you have that settled:

First I'd raise the voltage to 1.25V and set the core to 1100Mhz and go up in 25Mhz increments from there. <5min loop of Heaven should indicate worst instabilities fairly quickly. You also need to bump the power target to max, +20%, which will allow for the card to use as much power as it needs, no more no less. Temps below 80c are fine. Monitor the core speed while testing and you can raise the voltage above 1.25V if you have the temp headroom, but generally 1.25V takes you a long way.
post #15 of 25
you may need to increase the voltage slightly and or cooling, it may be throttling, or creating artifacts, with are subtracted from score, significantly
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post #16 of 25
Thread Starter 
Quote:
Originally Posted by Fulvin View Post

Might be that your card is voltage locked. I don't use AB myself and I can't tell you how to unlock it.

Once you have that settled:

First I'd raise the voltage to 1.25V and set the core to 1100Mhz and go up in 25Mhz increments from there. <5min loop of Heaven should indicate worst instabilities fairly quickly. You also need to bump the power target to max, +20%, which will allow for the card to use as much power as it needs, no more no less. Temps below 80c are fine. Monitor the core speed while testing and you can raise the voltage above 1.25V if you have the temp headroom, but generally 1.25V takes you a long way.

Thank you all for the help...

One last question ( i swear ) smile.gif ..... If i type a voltage like 1.25, am i choosing the upper limit of the voltage alowed by me for the GPU ?
post #17 of 25
I suppose you can interpret it like that, but essentially that's simply the target voltage you want for the GPU to receive. Due to vdroop it won't be exactly on spot, but rather a little lower.
post #18 of 25
sort of

Target is the actual voltagage supplied by the voltage regulators, Vdcc or measured is the voltage measured under load

due to the nature of real time measurement (its more complicated than that, but its sufficient for now), it introduces current loss, this is called Vdroop

so Target-Vdroop=Vdcc(measured)

Also, check your ASIC and report it here. In GPU-Z, right click on the title bar. its in there.
Edited by The Mac - 5/19/13 at 10:03am
post #19 of 25
Thread Starter 
Quote:
Originally Posted by The Mac View Post

sort of

Target is the actual voltagage supplied by the voltage regulators, Vdcc or measured is the voltage measured under load

due to the nature of real time measurement (its more complicated than that, but its sufficient for now), it introduces current loss, this is called Vdroop

so Target-Vdroop=Vdcc(measured)

Also, check your ASIC and report it here. In GPU-Z, right click on the title bar. its in there.


ASIC reported is 65.5% .... Can you please explain what that means ?
post #20 of 25
Quote:
Originally Posted by ruiviterbo View Post

ASIC reported is 65.5% .... Can you please explain what that means ?
It doesn't say that much really.
Lower ASIC cards is often more "leaky". That means you will need more power to achieve a stable O/C. However the ASIC-value is up for debate.

So, high or low ASIC-value has very little to do with the actual final O/C results. I have seen low ASIC-value cards overclock to almost insane levels. And high ASIC-value cards that O/C very poorly. And the other way around aswell...

In my opinion, i choose a lower ASIC card, after what i have seen and also based on my own Sapphire 7950 Vapor-X, that card has a extremely low 59.1% ASIC.
However, that Vapor-X does 1200 on core easy and 1600-1700 on memory.

Since you have the boost version, 1000MHz, i think it is set to 1.25v as default? Atleast my former Gigabyte 1000MHz had 1.25v as default.
So what you need to do is raise the Power limit to +20%. Start there and try it out, it should be enough.

If you leave it to 0 you will, as you have noticed, get a throttling card.
Edited by Falcy - 5/19/13 at 3:44pm
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