I've been seeing an interesting behaviour in the sim over the last few days. It's getting warmer here in Australia now and it's beginning to show in the sim.

I've got an 8 core Ryzen 7 and a 1080 Ti. The first thread of the CPU never gets above about 35% and the rest of them are even lower, but the GPU is always maxing in the mid to high 90s. The interesting thing is that with the warmer weather there are now recurrent pauses of a couple of seconds or more which took a bit of investigation to track down, but it seems to correlate with the temp of the GPU. I've got airconditioning in my sim room, the side covers off my box and external fans blowing inside because it gets hot here in the summer, but I've never seen these long pauses before.

As soon as I got the fans on and the room cool the behaviour vanished, and what was interesting to me was that the sim wouldn't crash even if I left it for a while which is what happens when the CPU gets hot. It was just unresponsive, taking time to process inputs such as mouse or keyboard controls.

I'm posting this in the MSFS forum because this is specifically MSFS behaviour. It's the other way round in the older sims; the CPU gets hot and crashes while the GPU remains relatively cool. Mods may feel free to move this topic to the hardware forum.

Your card should not be getting that hot with MSFS unless you’ve OC’ed it by a lot, unless it’s starting to fail!  
 

Sounds like you’ve got your cooling situated but you shouldn’t have to run it in an open case in a AC room with a separate fan blowing on it!  You may have gotten a bad card as it should not be running like that or there would be a ton of posts on it in here already! 

 

Running it that hot for too long will kill the card!

 

 

 

Edited October 4, 20205 yr by Kilo60

The perfect Temp for a GTX 1080 Ti is 72 ° at full chat (i.e; 100%)

If you're hotter - cool it more.

Do something, anything, dry-ice? Blow on it big time. Take it outdoors. Anything. . .

Tell it you don't love it anymore - that will make it cool off . . .

 

This sim gives my old Titan (Maxwell) a thorough workout!  I was constantly in the low 80s and I felt that was a bit warm, and with a blower card, the noise is...well....let's just say I can turn off the sound in the sim and if flying the jets, just use the sound of the blower as my sim sound...its that loud!

Until I see the 3000 series/Big Navi drama unfold to the point where I can actually get one, this card stays.

With that in mind, I took her apart and cleaned her well (she had dusty fins for sure), and replaced the stock paste (that was just caked on cookie dough at that stage) with some Kryonaut paste and she is never getting to 80 anymore....very happy and well worth the 1-2 hour investment in time.

Plenty of YouTube vids to show you all the steps....give it a shot and you should be in a much better place cooling wise.

Edited October 4, 20205 yr by Steve Dra
spelling

6 minutes ago, Will Fly For Cheese said:

The perfect Temp for a GTX 1080 Ti is 72 ° at full chat (i.e; 100%)

If you're hotter - cool it more.

This is what mine runs at when chugging near 100%. I'd be interested in hearing what the OP's card runs at.

Yeah. The noise. I hope the new cards are a lot quieter. Mine sounds like the maid is vacuuming a shag carpet. 

Ah, you guys have misread my ambiguous language - I wasn't saying I had mid to high 90s temperature wise, I was saying mid to high 90s % usage wise, ha ha. It's at 100% most of the time. I haven't checked the temps yet - I'll look into that next. Just feeling the card with my curious fingers it's lukewarm, it's not hot or anything. But the frequent pausing is plain as day and disappears when I cool the room.
 

Well my 2080 super is whisper quite in MSFS at 2k and everything on High/Ultra.  My old 1080 sounded like a jet engine almost all the time with a very modest OC...!

 

 May just be that series of cards?

I thought I would answer the topic question.

Your 1080ti, and most modern Nvidia GPU's have a thing called GPU Boost. It's job is to adjust your GPU's clock rate according to the power and cooling it receives.

With more power and less heat, you get higher clocks. With less power and more heat, you get lower clocks.

It operates independently of OCing, so even if you OC'd your GPU to 2000mhz, it will drop the clocks back to default or lower at certain temperatures.

It's possible that the hotter weather is simply dropping your GPU's clock rate. Ambient temps will certainly affect it, even with good cooling.

I have a 1080ti with a full water block running on a custom water loop, and it runs cooler in the winter than the summer.

Given you notice the change when it's hotter, there's a chance this is why. It's also possible (but less likely) that the hotter weather is affecting your PSU, where a drop a power is affecting it.

You can track your temps, clock rate, etc.....with an app like Afterburner, too see what's happening while you use it.

 

 

FWIW, just done a leg to test the temps. GPU sits on about 83C. Ambient temp about 25C, no aircon but a fan on either side of the box. No pauses.

48 minutes ago, Highmike said:

FWIW, just done a leg to test the temps. GPU sits on about 83C. Ambient temp about 25C, no aircon but a fan on either side of the box. No pauses.

If a GPU gets too hot the card throttles back to protect itself.

The throttle temp for a 1080ti is 84 degrees so sounds like your cad is throttling back due to heat.

Solutions in order of ease of implementation:

1. lower ambient room temp using an air conditioner

2. if the graphics card or PC in general is full of dust clean it, if blowing air directly on fans hold them and do not let them spin

3. replace the thermal grease between the GPU and heatsink with something better like NT-H2 do not use liquid metal (this dropped my 2060 temps by 5 degrees or so)

4. run your case with the side lid off in hot weather

5. do some research into good case airflow and invest in better case fans

6. (silly somewhat impractical option) buy an EK water block and water cool the GPU

 

 

Edited October 5, 20205 yr by Glenn Fitzpatrick

10 hours ago, Highmike said:

I've been seeing an interesting behaviour in the sim over the last few days. It's getting warmer here in Australia now and it's beginning to show in the sim.

I've got an 8 core Ryzen 7 and a 1080 Ti. The first thread of the CPU never gets above about 35% and the rest of them are even lower, but the GPU is always maxing in the mid to high 90s. The interesting thing is that with the warmer weather there are now recurrent pauses of a couple of seconds or more which took a bit of investigation to track down, but it seems to correlate with the temp of the GPU. I've got airconditioning in my sim room, the side covers off my box and external fans blowing inside because it gets hot here in the summer, but I've never seen these long pauses before.

As soon as I got the fans on and the room cool the behaviour vanished, and what was interesting to me was that the sim wouldn't crash even if I left it for a while which is what happens when the CPU gets hot. It was just unresponsive, taking time to process inputs such as mouse or keyboard controls.

I'm posting this in the MSFS forum because this is specifically MSFS behaviour. It's the other way round in the older sims; the CPU gets hot and crashes while the GPU remains relatively cool. Mods may feel free to move this topic to the hardware forum.

i have a founders 1080ti and when it hits 84c it will drop the core clock down to where it doesnt go over the 84c mark, make sure you have a good fan curve, i use msi afterburner 

My hardware clocks down to prevent it from overheating, but I'm on a gaming laptop, and I don't know if modern desktop computers utilize the same safeguards. Of course this means the cooler the processors, the higher clock speeds I get, so I might just stick my laptop outside this winter so I can get some extra fps 😉

One thing to try, as @steveuk1 said, get MSI Afterburner and set up a custom fan curve.

Definitely helps!

Depending on your Graphics card, you can download an app such as "MSI Afterburner" that allows you to manually set fan speed graphs. You can then ramp up the fan speed a little if the default settings seem to be struggling. GPU's at full tilt do run hot though. Stuttering could be an initial sign of overheating, as will freezes and crashes. A small free app such as HWMonitor can track your CPU and GPU temps throughout the session and give you a report back on average and maximum temps encountered during your sim session. Can be very useful if you are concerned about temps.

Edited October 5, 20205 yr by RaptyrOne