Did you know that running 144 Hz causes ridiculously high idle temperatures and power draw on your nVidia GPU? - Overclock.net - An Overclocking Community
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Did you know that running 144 Hz causes ridiculously high idle temperatures and power draw on your nVidia GPU?

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post #1 of 176 (permalink) Old 06-20-2014, 02:31 PM - Thread Starter
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Hey guys,

I wanted to talk about just what the title suggests. I have a feeling that many people don't realize this. Running your monitor(s) at 144 Hz will prevent your primary GPU from ever downclocking into the idle power state (i.e. 324 MHz core and memory clocks) causing ridiculously high idle temperature and power draw. Edit: We have figured out that with only a single monitor, the cards will downclock. With more than one monitor and at least one set to 144 Hz, they will go to the high idle state. 120 Hz and below will allow the card to be able to idle down on the desktop which leads to normal idle temps and power draw.

On my particular 780 Ti, the idle power state (achieved either by 120 Hz or 60 Hz refresh rates in NVCP) produces a temperature of 32C with a power draw of 10%, or 25W based on the 250W TDP. With the refresh rate set to 144 Hz, I see "idle" clocks of 810 MHz, 47C, and 55% power draw. That's an additional 113W used on the desktop, not to mention some pretty ridiculous idle temperatures.

Now, the reason I suspect that not many people realize this is because I would anticipate many more complaints and much more noise to be made on the forums if everyone knew. More and more people are running 144 Hz monitors now, and I think we will see even more with this next generation of G-Sync monitors. I can't imagine people are or are going to be ok with this ridiculous increase in temperature and power draw at idle by utilizing their 144 Hz monitors the way they're intended to be.

I have posted on the nVidia forums in the driver section inquiring if it would be possible to have a dynamic refresh rate in the driver. Basically, the way I envision it, there would be a 2D and a 3D refresh rate setting in the drivers. You could set 120 Hz for 2D (desktop) and 144 Hz for 3D. This would allow the best of both worlds. However, I have no idea if this is possible. The post received an acknowledgement from a forum moderator that it was a solid idea, but nothing more.

My point of posting here was to bring attention to this. Maybe some people more knowledgeable than I could chime in as to why the GPU's operate this way and what remedies could potentially be done. Maybe we could also start being a little louder about getting a solution to this from nVidia. As we see more and more 144 Hz refresh rates in the future, I would think this is something that will ultimately have to be dealt with.

Thoughts?

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post #2 of 176 (permalink) Old 06-20-2014, 02:34 PM
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There is still benefits to having a higher refresh even on desktop.

Anyways the reason that the cards don't downclock as far under high refresh is because the additional pixel clock that is needed at higher refresh rates. A bit more stressful on the card.

You will see the same thing with multi-monitor setups.
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post #3 of 176 (permalink) Old 06-20-2014, 02:38 PM - Thread Starter
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Quote:
Originally Posted by EVGA-JacobF View Post

There is still benefits to having a higher refresh even on desktop.

Anyways the reason that the cards don't downclock as far under high refresh is because the additional pixel clock that is needed at higher refresh rates. A bit more stressful on the card.

You will see the same thing with multi-monitor setups.

My 780 Tis always ran in the idle power state when I ran 5760x1080 as long as I had 120 Hz selected. If I selected 144 Hz then it would ramp up the clock as well. It is the same story with a single 1080P monitor.

I agree that having 144 Hz on the desktop is ideal, but I had a feeling it was pixel clock related. If it were possible to get normal temps and power draw and still have 144 Hz on the desktop that would be great, but it doesn't sound like it is. To me, the next best option is something dynamic. Would this even be possible? Of course, it would always be up to the end user as they could set whatever 2D and 3D refresh rates they wanted. If they wanted 144 Hz on the desktop they could do so.

Thank you for the response, btw.

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post #4 of 176 (permalink) Old 06-20-2014, 02:42 PM
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Works fine for me on a 770 (337.88).
Edit: Also worked fine when I was using a 780 classy.


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post #5 of 176 (permalink) Old 06-20-2014, 02:47 PM - Thread Starter
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Quote:
Originally Posted by 7ranslucen7 View Post

Works fine for me on a 770 (337.88).
Edit: Also worked fine when I was using a 780 classy.


Very interesting. Not sure why mine would not. I have Asus VG248QE's. Have tried it on 780's, Titans, 780 Ti's, 3930K + RIVF, 3770K + MVE. Have tried across many different drivers. All the same result.

Edit: What about others using 144 Hz? Do your cards idle down normally?

Edit 2: To 7rans, how do your cards clock all the way down to 135 MHz?

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post #6 of 176 (permalink) Old 06-20-2014, 03:06 PM
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Here is what I get but mind you my temps have not yet stabilized after disabling my second monitor


Here is with my second monitor turned on and temps have not stabilized yet after turning it back on



My second monitor is a 19inch TV AOC 1440x900 @60hz
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post #7 of 176 (permalink) Old 06-20-2014, 03:16 PM
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my 780 idles at 324mhz on my single 144Hz monitor (@144Hz). When surfing with firefox it stays at 324mhz but with chrome I get 3D clock speed (888mhz)


Did you measure that 'additional 113W' ?

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post #8 of 176 (permalink) Old 06-20-2014, 03:16 PM
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This has been the case even with 120Hz and older cards. At 120Hz my GTX460 only down-clocked half way but at 110Hz it drops all the way down to 50 on the core just like it does at 60Hz. So I keep mine set at 110Hz.

In the Nvidia drivers you go into the 3d settings and change the preferred refresh rate to highest available and when you launch a game it will flip the monitor to 120Hz (or in your case, hopefully 144Hz). Once you get done and exit the game the monitor will return to 110Hz.

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post #9 of 176 (permalink) Old 06-20-2014, 03:19 PM
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Crazy you started this topic because just the other day I set my monitor to 144Hz. I noticed my number 1 GPU didn't ever down clock to idle at 135MHz but instead stayed at 744MHz-ish. Didn't even put 2 and 2 together on this one. I also noticed the temp increase. About 10deg difference on my card vs the second card.

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post #10 of 176 (permalink) Old 06-20-2014, 03:38 PM - Thread Starter
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Quote:
Originally Posted by everlast4291987 View Post

Here is what I get but mind you my temps have not yet stabilized after disabling my second monitor


Here is with my second monitor turned on and temps have not stabilized yet after turning it back on



My second monitor is a 19inch TV AOC 1440x900 @60hz

Very interesting. I always have a second monitor plugged in, or three when I was running surround. Maybe with just a single monitor plugged in the card will downclock. It looks like yours idled normally by itself but not with the second monitor plugged in. I'll have to try it, but in the end I'm going to be running two monitors.

Quote:
Originally Posted by TiezZ BE View Post

my 780 idles at 324mhz on my single 144Hz monitor (@144Hz). When surfing with firefox it stays at 324mhz but with chrome I get 3D clock speed (888mhz)


Did you measure that 'additional 113W' ?

I will have to try unplugging my second monitor to see if it downclocks then.

As for the additional 113 ... 250W TDP*0.55(144 Hz idle power is 55%) - 250W TDP*0.10(120 Hz and below idle power is 10%). I didn't measure it directly, no.

Quote:
Originally Posted by Derp View Post

This has been the case even with 120Hz and older cards. At 120Hz my GTX460 only down-clocked half way but at 110Hz it drops all the way down to 50 on the core just like it does at 60Hz. So I keep mine set at 110Hz.

In the Nvidia drivers you go into the 3d settings and change the preferred refresh rate to highest available and when you launch a game it will flip the monitor to 120Hz (or in your case, hopefully 144Hz). Once you get done and exit the game the monitor will return to 110Hz.

I will see if I can set refresh rates for game profiles.


Edit: It appears that with a single monitor only, the card will idle normally. Plugging in a second monitor or more, even if it's running at 60 Hz will cause the high idle state if any one monitor or more are set to 144 Hz.

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