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post #7511 of 10472
Quote:
Originally Posted by reflex75 View Post

But I'm trying to figure out why 2 different cards, if set to the exact same level of initial boost clock (let's say 1759Mhz) will boost to different clocks?

Different cards often have different VID (=different thermals, power requirement, ...). This is one of the things almost all GPU reviewers completely ignore and still compare for example power usage without mentioning the GPU base voltage.
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post #7512 of 10472
Quote:
Originally Posted by s1rrah View Post

What is "locking the voltage" and how do I do it?

with your curve open you press L this will lock it at the point you select from going higher on clocks/voltage
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post #7513 of 10472
Quote:
Originally Posted by GNUster View Post

I guess this is simply related to the power consumed by the game and thus the heat produced. That is, on the Strix the gpu and vram conduct heat to both the heat sink and backplate. Thus, in a more demanding game (like Witchter 3) your vram gets hotter due to the shared heat sinks with the gpu (and hence your vram is less stable) even if you use the same mem clock that is stable in all your less demanding games (like BF1).

So it is a downside of STRIX that it conducts heat also from VRAM? How other AIBs handle it? It this some sorf of design flaw?
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post #7514 of 10472
Quote:
Originally Posted by Benny89 View Post

So it is a downside of STRIX that it conducts heat also from VRAM? How other AIBs handle it? It this some sorf of design flaw?

Not at all, most mid/high end cards do the cooling this way because overall it gives you a more stable card for regular use. However, when you push the card to the limit, you have to consider those side effects and adapt your cooling solutions appropriately.

Edit: The most typical solution to your problem would be to overall scale up your cooling capacity by applying a water block. With that, you would have enough head room to keep all components below critical temps even under most demanding conditions.
Edited by GNUster - 4/28/17 at 4:23am
post #7515 of 10472
Quote:
Originally Posted by GNUster View Post

you have to consider those side effects and adapt your cooling solutions appropriately.

Exactly. Coming back to Benny89s situation, I would recommend a more aggressive fan curve and see whether that will keep the GPU < 60C stabilizing the OC for Witcher 3.
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post #7516 of 10472
Quote:
Originally Posted by Clukos View Post

Some charts from my testing results with The Witcher 3 maxed at 4k (with hairworks 8xAA) from this post: http://www.overclock.net/t/1624521/nvidia-gtx-1080-ti-owners-club/7470#post_26053260





Note that these results are without shunt mod, air cooling (MSI Gaming X) and the maximum attainable curve OC I could get to run stable on this game (2113MHz 1.0930mv). I'm power limited in both stock and overclocking tests. But it shows that while the 1080 Ti is a power hungry beast, you can also make it a power efficient beast if you want to (for thermals/acoustics) without losing too much performance thumb.gif

- Recommended for those with aftermarket cards that don't want to shunt mod and want a quiet/cooler 1080 Ti
- HIGHLY recommended for those owning a 1080 Ti FE!

Note that memory OC doesn't affect power draw that much so you can push it as much as you want to. Core voltage affects power draw the most out of anything.

Great work with the graphs for comparison.
as a FE owner I appreciate stuff like this massively rep++
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post #7517 of 10472
Quote:
Originally Posted by nrpeyton View Post

Great work with the graphs for comparison.
as a FE owner I appreciate stuff like this massively rep++

totally agree I gave him +rep too! nice work!
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post #7518 of 10472
Quote:
Originally Posted by GNUster View Post

Not at all, most mid/high end cards do the cooling this way because overall it gives you a more stable card for regular use. However, when you push the card to the limit, you have to consider those side effects and adapt your cooling solutions appropriately.

Edit: The most typical solution to your problem would be to overall scale up your cooling capacity by applying a water block. With that, you would have enough head room to keep all components below critical temps even under most demanding conditions.

OK thanks for all the help and info. But since when "critical temps" are below 70C? I was overclocking my 980Ti to the absolute limit and it was on air on 74C max and never downclocked more than 15mhz down from inittial OC result.

Pascal card downclock several times when in usage. 980Ti downlocked ONCE. Initital OC 1565 on core, downclock after 60C to 1555 and stayed there forever and ever.

Strange that 60C is suddenly some temp threshold with those cards.... frown.gif
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post #7519 of 10472
Even 50C is a threshold, the lower you go with Pascal the higher it goes in clocks.
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post #7520 of 10472
Quote:
Originally Posted by Benny89 View Post

Strange that 60C is suddenly some temp threshold with those cards.... frown.gif

There is no specific temperature. It's just the higher the temperature the more easily the GPU will crash when it's on the edge of stability. The 60C threshold I only suggested based on your Witcher 3 data.
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