After the last update, I have some fan(s) (not sure which ones yet) kinda revving on & off during flight - it’s really noticeable as I look around or change outside views.
I’m using Open Hardware Monitor but haven’t been able to figure out which fan is spinning up from that - is there a way to filter the results? (I’m using the graph view so I don’t have to rely on seeing numbers changing…)
thanks
Most probably the CPU/radiator fans do that…
If you have an AIO, make sure the fan speed is linked to the water temperature, NOT the CPU temperature. The latter has many spikes and can induce this revving you are experiencing.
Thanks - that’s what I figured regarding CPU. I don’t have watercooling, though.
Within your BIOS settings, you can configure each fan to operate at a specific, consistent speed. By doing this for each fan individually, it makes it easier to pinpoint and identify the particular fan you’re trying to diagnose or monitor.
Hmm, revving fans means you’re likely stressing a component / creating heat.
Where are you flying where this is occurring? Near a lot of new PG?
It may only mean that where you are flying has gotten more detailed, so your computer is getting hotter. Have you added any addons recently (other than the update), like FSTL or other AI addon?
When have you cleaned your PC the last time from dust?
Some cases have dust filters in front of the air intake.
Keep 'em CLEAN, especially in the hot summer time!
In case you have a case without dust filters, clean the heat sinks of the CPU and the GPU-
Keep 'em CLEAN, especially in the hot summer time!
And, last advice, but this is only for the pro:
In some rare circumstances the heat conduction pad / heat conduction paste between the heat source (CPU / GPU) may dry out.
Then you need to get this repaired.
Hi -
It’s only since the update, and it doesn’t matter where I am or what the weather is. I haven’t added anything new.
The fans rev, then slow down, then rev, etc. based on where I’m looking, mostly. It also seems to rev on and off when just flying straight & level, too.
Hmmm…
Thanks for the note!
“When have you cleaned your PC the last time from dust?”
Sort of recently - maybe 2 months ago. I have filters, too. Couldn’t hurt to do it again, though.
I think if it were a strictly mechanical problem (e.g. paste), it would happen more often in other apps that stress the CPU/GPU (3d modeling/rendering), and I’d think it wouldn’t be so erratic.
I built the computer, so I can take it apart if I need to.
FWIW the GPU (RTX 3080) fan isn’t revving, and the temps are good.
Some fans revving up and down during flight means CPU needs cooling to cache and pre-render.
Thanks - I’ll take a look at the CPU temps again.
If that’s the case, I’m assuming something changed with the most recent update, since I’ve never heard it before.
I’ve definitely seen a few pre-built systems that have odd fan curves stock in an attempt to be quiet and safely cool they go from library to construction site at 70 or 80c
Also we on the east coast are enjoying some temperature swings so your homes ambient temp may be affecting things as well
As others have said it’s most likely your CPU temp crossing a threshold
If you are comfortable with bios settings setting up a more aggressive and balanced curve is my favorite
I like to start with the likes 50% at 40c (idle for me) 60% @ 50c 80% at 60c and max them out at 70c that way as your heating up your presenting more cooling earlier.
What you describe sounds like 50% up to 70-80c then full power until it drops and then slows, annoying.
Interesting post, but, I’m not understanding what you’re saying completely, especially this comment… ?
What’s a fan curve? Where does one find these settings you’re talking about?
The comment is meant to convey the volume of cooling fans going form 60% to 100%
As for what a fan curve is: Many motherboards via both bios and software allow you to “map” cooling.
Some by voltage and or PWM pulse width modulation but the basic is when your PC isnt working you can have quiet lower use fans and when it is in heavy use the fans can go to 100% and create more noise.
I can find these settings in both software and my bios.
Follow up!
I think it may be my PSU!
Just sitting there with FS open but on the menu screens, suddenly, I heard fans. Out of curiosity, I felt the PSU (EVGA 850 Gold 80) and it was HOT… considering it wasn’t doing much.
Turned off MSFS & the fans stopped, and it had cooled a few minutes later.
Not sure how to find/test this, though… any suggestions? I didn’t see the PSU in Open Hardware Monitor.
Specs:
Asus Tuf 570-Pro | Ryzen 7 5800X Vermeer 3.8GHz 8-Core AM4 | NVIDIA GeForce RTX 3080 TUF Gaming V2 LHR Overclocked Triple-Fan 10GB GDDR6X PCIe 4.0 | Ballistix Gaming 32GB DDR4-3200 PC4-25600 CL16 | 980 SSD 500GB M.2 NVMe Interface PCIe 3.0 x4 | SuperNOVA 850 GA 850 Watt 80 Plus Gold ATX Fully Modular Power Supply | Lancool II Tempered Glass eATX Full Tower Computer Case | NH-D15 Brown CPU Cooler
thanks again
Personal Comments and Observations
I agree with the suggestions to first test out components with software as well as physical checks to make sure everything is working as it should - free of dust, no dodgy connections or cables, all properly seated etc.
One you have confirmed all this and the pc is running properly, if you still find you are experiencing the fan speed / noise issues then I’d suggest a couple of other things to try.
First, have you tried the free, open source Fan Control app? If not, you can get it from here: Home - Fan Control (getfancontrol.com)
Jay2C liked it very much in this YT video: Everyone NEEDS this FREE piece of software… You will thank me! - YouTube
This is a powerful and flexible piece of software, that offers a level of control across all of your pc cooling that has not been readily and conveniently available before. You can control every fan in the pc from the app, setting individual curves, response rates and boundary temperatures as required. You can also set your cooling fans to respond to a mix of all the temperature sensors, so that not just one component is hot and with busy / noisy fans while the rest are quiet.
In practice this ‘Mix’ option means that instead of, say the cpu or gpu getting hot and spinning it’s fans while the case and other component fans are idling, you can gently ramp up all (or any combination you choose) of the fans in response to the hot gpu, cpu, or whatever. This increases overall airflow and acts to cool the cpu radiator even before the heat soak from the gpu reaches it. Overall, you get a more consistent and quieter cooling performance from the pc. You can also set the reaction times and curves, which specifically avoids the problem of fans suddenly revving up to high speed, backing off for a few seconds, then racing back to maximum speed and suddenly cutting back to idle.
Second thought would be the fans themselves - you don’t mention what brand or size are being used, but wherever possible I have replaced them with be quiet! fans and it has always been an improvement in cooling and particularly noise. Changing the Corsair ML 120mm fans from my old cpu cooler to BQ made a very audible difference, as did switching out the Phanteks fans that came with my pc case for 140mm BQ ones.
Good luck with your investigations, hope you get it sorted out.
Thanks for the detailed response! Looking into the software now.
After a bit more investigating (i.e. listening when the fan(s) speed up) I believe it’s the bottom fan on the PSU I’m hearing. However, I don’t have a monitorable PSU, so don’t know the speeds/temps…
I picked up a Corsair RM850x (still in the box), but believe that maybe I should look into a digital PSU if want to be able to monitor it properly?
Maybe something like the Corsair AXi Series?
Firstly, a power supply by it’s nature will get hot in normal use, so it may be nothing to worry about. If the pc is not giving you BSOD’s, crashes and random shut-downs in use then the PSU is likely not faulty.
It certainly wouldn’t hurt to ensure the inside of the pc is kept pretty clean and dust-free, and that the psu has plenty of space around for it’s air intake and exhaust. If the pc case is sitting directly on carpet for example, this would not help.
Swapping to a Corsair psu of the same wattage will likely not make any difference, and that rating looks about right for your components. If you are bothered by it though and if you are determined to change the psu, it may be better to select one of a higher rating, in the hope that running at 50% capacity instead of 80% might make it quieter, as could selecting one from a different manufacturer.
I have a be quiet Dark Power Pro 12 in my pc and I can’t say I have ever heard it working, and certainly not over the case and GPU fans. This review compares the noise of the 850w BQ psu vs your EVGA Supernova on P.11:
be quiet! Dark Power 12 850 W Review - Titanium Silence - Performance Rating: Stability, Noise, Efficiency & PF | TechPowerUp