Is it best to have the GPU control to the speed of the Case Fans ?

[chaparral]

Am thinking of using my GPU to control the speed of my case fans

So this will mean the cases fans would speed up/down due to the heat of the GPU and not the CPU

Do you guys use the heat of the GPU or CPU to control the speed of your case fans ?

 

[benjii]

My case fans respond to GPU temp. Unless you're doing extreme loads or running benchmarks all day, an extra few degrees of heat for the CPU won't matter at all. I don't know about AMDs latest GPUs, but Nvidia GPUs lose performance as they get hotter, so it's a no brainer.

Coincidentally, that's why I have my AIO on exhaust and not intake. I'd rather my GPU get the fresh air, as my CPU is totally fine being at 48c while gaming instead of 42c!

 

[Hakanese]

If you are still going to have your cpu fan controlled by your cpu, then I don't really see an issue why you couldn't go with gpu controlled case fans, especially in a smaller case

 

[PC777]

I use CPU for my case fans as my GPU fans don't even come on until 59c.

Argus System Monitor lets you use an average combo of both GPU and CPU, possibly other things will let you do that as well.

 

[chaparral]

I use CPU for my case fans as my GPU fans don't even come on until 59c.

But that when it idle

My thinking of it is
When it underload a GPU uses something like twice the power compared to a CPU so will give out far more heat then a CPU

 

[Hakanese]

Most of the time it is the gpu that dumps the most heat in your case especially if you overclock your gpu and hammer it in games. I would try it myself but I'm running the cpu under water whilen I wait for the 3080 debacle to die down

 

[PC777]

But that when it idle

My thinking of it is
When it underload a GPU uses something like twice the power compared to a CPU so will give out far more heat then a CPU

I think it depends on different setups.

I have an OC'd 9900k that ranges from about 28C silent at idle to mid 60's C gaming with little noise, but then at least 10C higher than that for Cinebench at 100% load. I've also got 2 140mm case fans just above my CPU cooler, so matching them to CPU temps cools my case really quickly, especially as GPU heat rises slightly, affecting CPU temps as well, which the CPU linked case fans take care of as well.

My non OC'd 2070 Super idles fanless at around 38C and maxes out around 65C under load once the fans kick in at 59C. I get better silence and more fan range overall using CPU to set my case fans, but that's with a OC'd 9900K that runs hot.

Worth trying out different settings to see what works best.

 

[chaparral]

I think it depends on different setups.

I have an OC'd 9900k that ranges from about 28C silent at idle to mid 60's C gaming with little noise, but then at least 10C higher than that for Cinebench at 100% load. I've also got 2 140mm case fans just above my CPU cooler, so matching them to CPU temps cools my case really quickly, especially as GPU heat rises slightly, affecting CPU temps as well, which the CPU linked case fans take care of as well.

My non OC'd 2070 Super idles fanless at around 38C and maxes out around 65C under load once the fans kick in at 59C. I get better silence and more fan range overall using CPU to set my case fans, but that's with a OC'd 9900K that runs hot.

Worth trying out different settings to see what works best.

My setup almost totally the opposite to your high power CPU / Mid power GPU vs my High power GPU / Mid range power CPU

Am not even sure if these fan headers on my GPU can even control the speed of the case fans or if they just give out the stock 12volts as i never used them before

 

[PC777]

With Argus System Monitor it just uses the GPU temp sensor to control case fans, you don't need to attach them to the card itself, I can switch to GPU driven case fans in Argus without changing any case fan cables. They just all run through the motherboard as normal.

Argus is actually a great tool for testing this kind of thing out as it overrides bios settings with many more options than most bios for fan settings, there's a free trial version available as well.

Edit:


Argus can also be set on a per fan basis so you could have fans under GPU set to be GPU driven only, ones above CPU to be CPU only, or any being a mix of the two.

 

[chaparral]

With Argus System Monitor it just uses the GPU temp sensor to control case fans, you don't need to attach them to the card itself, I can switch to GPU driven case fans in Argus without changing any case fan cables. They just all run through the motherboard as normal.

Argus is actually a great tool for testing this kind of thing out as it overrides bios settings with many more options than most bios for fan settings, there's a free trial version available as well.

Thanks .. I have to take a look at this Argus software

 

[Radox-0]

My setup almost totally the opposite to your high power CPU / Mid power GPU vs my High power GPU / Mid range power CPU

Am not even sure if these fan headers on my GPU can even control the speed of the case fans or if they just give out the stock 12volts as i never used them before

You can use an area in ASUS's GPU Tweak software. Can set up fan profiles if you use those headers.

 

[Vogon]

My case fans are set to mobo temp, which as far as I can work out is taken on or near the VRMs.
But I see no reason why you can't set to GPU, after all the hottest thing in your case will likely be the GPU.

 

[chaparral]

With Argus System Monitor it just uses the GPU temp sensor to control case fans, you don't need to attach them to the card itself, I can switch to GPU driven case fans in Argus without changing any case fan cables. They just all run through the motherboard as normal.

Argus is actually a great tool for testing this kind of thing out as it overrides bios settings with many more options than most bios for fan settings, there's a free trial version available as well.

Edit:


Argus can also be set on a per fan basis so you could have fans under GPU set to be GPU driven only, ones above CPU to be CPU only, or any being a mix of the two.

Looks like i can't control my fans with this software as it comes up with this message
"Fans on Asus Service Source are only readable, Not controllable "

You can use an area in ASUS's GPU Tweak software. Can set up fan profiles if you use those headers.

I saw in GPU tweak that it can read the fan speeds that connected to them headers,, I have a look for where i can make fan profiles