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Second monitor is stopping 0 RPM mode on RTX 3070

t2na

t2na

t2na

Soldato
Joined
27 Jan 2020
Posts
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Location
West Sussex
Slightly odd one...

I moved my build from one case to another this afternoon (NR200 to Ncase M1) and was running some thermal / noises just now to get everything nice and quiet at idle and performing well at load as the fan setup is ever so slightly different in the Ncase vs. the NR200.

I noticed my 3070 FE fan speeds were showing at 30% - despite having no custom fan profile for the GPU in place (the card is undervolted with a memory overclock). Temps were around 30 deg so it was definitely not in the window where the fans needed to be spinning and I prefer to not touch the GPU fan curve so I can take advantage of the 0RPM mode.

Had a small look online and took a chance and I disabled my second monitor in the control panel and the fan speeds immediately dropped to 0% and I had the 0RPM mode working again.

If I turn the second monitor back on, the fan speeds go right back to 30%. The issue I have is that I can't for the life of me remember if this was happening in my old case - or whether a latest driver update from Nvidia has caused it? Has anyone come across anything similar? Appreciate any help.

Specs if anyone is interested / wants to know more detail:

Monitor 1: 27GL850
Monitor 2: AW2521HFL

5800x (cooled with C14s)
Asus B550i
16GB 3600 CL16
2x 1TB m.2 drives
3070 FE

2x 120mm fans as intake on the bottom of the case
2x slim 120mm fans as intake on the side bracket
1x 92mm fan as intake at the rear
 
I wonder where it is an actual bug, or where driving your two monitors are their resolutions and refresh rates, just causes the card to run the memory and/or core at a certain clock and the card sees the power consumption and turns the fans on rather than monitoring the temperature as we'd expect?

Point being, is it then possible to tweak those clocks to stop this? Or even run both monitors at a 60Hz just to test?
 
KompuKare said:
I wonder where it is an actual bug, or where driving your two monitors are their resolutions and refresh rates, just causes the card to run the memory and/or core at a certain clock and the card sees the power consumption and turns the fans on rather than monitoring the temperature as we'd expect?

Point being, is it then possible to tweak those clocks to stop this? Or even run both monitors at a 60Hz just to test?
Click to expand...
I did a little bit of a test this morning trying out what you said (thanks btw) and it doesn't seem to matter what I do - if I boot the PC with both monitors 'enabled' at whatever HZ then the GPU fans spin.

However, if I boot the PC with just the single monitor enabled - then enable the second one afterwards then the monitor works and the GPU fans don't spin. That's at varying refresh rates as well - so I booted my PC with just the main 1440p 144hz monitor 'enabled' - then after it boots, I enable the second monitor via control panel at 1080p 240hz. 0RPM mode works as intended.

It's only if I boot the PC with both monitors enabled that I get the issue - proper weird one.
 
Sure is properly weird then.

Still, with the Windows keyboard shortcut (Win+P) it's easy to turn the second monitor on and off. But you'd have you remember to turn it off each time you shutdown, so not ideal.
 
t2na said:
I did a little bit of a test this morning trying out what you said (thanks btw) and it doesn't seem to matter what I do - if I boot the PC with both monitors 'enabled' at whatever HZ then the GPU fans spin.

However, if I boot the PC with just the single monitor enabled - then enable the second one afterwards then the monitor works and the GPU fans don't spin. That's at varying refresh rates as well - so I booted my PC with just the main 1440p 144hz monitor 'enabled' - then after it boots, I enable the second monitor via control panel at 1080p 240hz. 0RPM mode works as intended.

It's only if I boot the PC with both monitors enabled that I get the issue - proper weird one.
Click to expand...


It's actually normal if you have two monitors or more on a gpu the fan will not go into idle state (with high refresh rate montors) as you will see if you use gpu-z the clocks never idle and stay slightly higher when 2 or more monitors are used so the fan has to stay on to keep the temps right. This has happened since day one of multi monitor use with high refresh rate montors. Stick both monitors to 60hz as a test and you will see the gpu will idle at 210mhz and the fans will stop, setting them to high refresh rate will stop the core clock speed to drop to 210mhz and then it will heat up and not have the fan stop feature.


1440p @ 144hz and a 1080p and 240hz will never idle at 210mhz, try setting them both to 60hz as a test and see , then at 100hz both and see again then raise the refresh rate of the montors and see where it will stop idling at 210mhz the core clock, use gpu-z.
 
amigafan2003 said:
Yes, it's a known bug.
Click to expand...
It's not a bug but a feature when using many monitors as the clocks can not idle when two or more monitors are enables and if using high refresh rate monitors it is even worse, he's using a 144hz and a 240hz monitor, to use them at that refresh rate the clocks can not be 210mhz the idle clocks to work right.
 
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My 3080 does more or less the same thing with a 1440p 170hz and 3x 1600x1200 60hz monitors attached. The fans won’t spin on boot, but once they’ve started spinning due to temperature (after plying a game for instance) they’ll never spin down below 1000rpm, even if the temp of the gpu falls below the threshold for them to have started/stopped.

the gpu draws around 30w at idle, which is better than the 60w that the 1080Ti it replaced used to do at idle!

as others have said, I think it’s a driver bug. I haven’t tried Nvidia Inspector as that caused big issues with the 1080Ti - maybe give that a try and see if the low-power idle mode works?

I say it’s a bug as this same monitor combination only drew 20w at idle with a Vega64 and the fans on that would happily ramp up and then ramp down to idle once the card had cooled.
 
CuriousTomCat said:
A second screen doubles the pixels. Double the pixels = double the work. Work = heat. It's physics.
Click to expand...
Totally get that - however the 0RPM mode is in place until a certain heat level which my GPU isn't reaching even with dual monitors. I have two NFA12x25's below the GPU running at 25% speed so the GPU stays nice and cool at idle.

@Purgatory - I took your advice and I tried all sorts of combinations to see if I could force it to happen or not happen. I used 1 monitor at 144hz and the other at 60, both at 60, both locked at 144hz and even tried each monitor individually - there is no consistency to it at all. At one stage a single monitor at 60hz had the fans spinning!

This is where I'm at currently - the below is with the 0RPM mode working.

Single monitor at 1440hz - GPU-z, HWiNFO, Afterburner etc. - https://i.imgur.com/5fa2yPp.png

Dual monitor at 144hz and 240hz - GPU-z, HWiNFO, Afterburner etc. - https://i.imgur.com/bEP0iFE.png

--

And just to throw another curve ball - the exact same settings as the second link above (144hz, 240hz) but this time the fans are spinning at 30%. No changes, just a restart of the PC 2 minutes after the above and straight into 30% speeds.

https://i.imgur.com/gPRW4w9.png

--

And last edit for now (I promise...) Both monitors at 60hz (1080p / 1440p), clock speeds at the same and temps are in the same rough window as above but the fan speeds still set to 30%.

https://i.imgur.com/8HSV4YB.png
 
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Harbz said:
Anyone know if this effects all nvidia 30X0 cards?
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I was helping a mate out the other day undervolt his 3080 and the same issue was happening on his card as well with the 30% fan speed with multiple monitors plugged in. From a bit of looking around online it definitely seems like it happens across at least the 3060Ti, 3070 and 3080 FE cards.
 
I am having the same issue with my 4090FE, the fans don't stop spinning even if the GPU has been idling at 30 degrees and 210MHz for minutes.

Is there any known fix?
 
I think it's happening because with 2 monitors, the GPU idles at 26w, and that turns the fan off, but with my 3 monitors, it idles at 40w, which is kind of strange considering the only 1 monitor difference.
 
With only 1 monitor it's idling at 12w. Seems like DP monitors consume 14w and HDMI consume 12w. I suppose the solution would be to increase the maximum wattage to keep the fans idling. No idea how to do that though.
 
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Finijumper said:
I am having the same issue with my 4090FE, the fans don't stop spinning even if the GPU has been idling at 30 degrees and 210MHz for minutes.

Is there any known fix?
Click to expand...

Well you could always set a custom fan profile with 0 rpm below a certain temp.

Unless the card is overriding software fan controls.
 
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muon said:
Well you could always set a custom fan profile with 0 rpm below a certain temp.

Unless the card is overriding software fan controls.
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It doesn't seem to be related to temperature, at least that was the situation with my 3070 FE.

My GPU could be in the mid 20's for temp but if I had two monitors running the fans would be spinning at 30%. The only way I got round it was to only have 1 monitor switched on when I started my PC and then turn the second one on a few minutes after.
 
Is everyone using the second monitoring for gaming?

For those with integrated graphics, could you connect the second monitor to the motherboard?
 
david25 said:
Is everyone using the second monitoring for gaming?

For those with integrated graphics, could you connect the second monitor to the motherboard?
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I don't use my secondary monitor for gaming so I'll try that. I didn't know I could use integrated and external gpu at the same time.
 
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