AIO cooler noise

[B4zookaw]

I suspect the fans are creating a resonance wave between them, one way to break this is to try and get them to run a lot different speeds than one another. Im wondering if you can create two similar but slightly different custom fan curves in iCUE and apply one to each. That way one fan might be at 1000rpm and the other 1100rpm. This might break the resonance wave.

Edit: I think iCUE offers ability to run at fixed RPM. That might be an easier way of testing this by setting one fan at a set speed and adjusting the other to see at what point resonance occurs.

 

[Mickkey]

Is there a dust filter on the top of case (assuming you have aio top mounted)? Im wondering if fans are just resonating with radiator, and removing filter might alter that in any way? If you remove fans from radiator and run the aio does the noise remain?

I've tried removing the dust filter, no change. I havent tried running it without the fans attached, i wouldnt think that would be a good idea?

I suspect the fans are creating a resonance wave between them, one way to break this is to try and get them to run a lot different speeds than one another. Im wondering if you can create two similar but slightly different custom fan curves in iCUE and apply one to each. That way one fan might be at 1000rpm and the other 1100rpm. This might break the resonance wave.

Edit: I think iCUE offers ability to run at fixed RPM. That might be an easier way of testing this by setting one fan at a set speed and adjusting the other to see at what point resonance occurs.

I didn't know i could do different speeds, sounds like it could be a good shot, i'll give it a go. Would this cause any problems with bearings or something in the future if they're running at different speeds?

I'm curious: What speeds are the fans running at? If you go into iCUE and click on the cooler, then cooling, it should list the fan and pump speeds. Just wondering if these are spinning faster than they should be. Whilst the fans are the same, I am unsure how different the H100i Elite Cappelix is from the H150i Elite...anyway, in case it helps, these are my fan speeds (everything is on the default it was set at when I first installed iCUE and it isn't overly loud):

View attachment 37172

Will update you with my speeds tomorrow as well as don't know them off the top of my head.

Cheers.

 

[B4zookaw]

I didn't know i could do different speeds, sounds like it could be a good shot, i'll give it a go. Would this cause any problems with bearings or something in the future if they're running at different speeds?

No not at all, the fans are designed to run from 0 RPM up to their max speed, so any RPM between these two limits is fine. I'm hoping that having one fan run slower or faster than the other by a small % will remove the resonance, assuming that is the issue.
What I'd do is run Fan 1 at a fixed 1000 RPM. Then slowly change Fan 2's RPM from 0 in 100 increments and see at what point it starts to make the noise. You might find that Fan 1 running at 1000 and Fan 2 at 900 is fine, but once you run Fan 2 at 1000 the noise returns. In which case you could drop it back to 900, and increase it in increments of 10. This will eventually allow you to identify how much lower you need to run fan 2.

Then you can create two custom curves that allow the fans to speed up as coolant temp increases, but slightly offset from each other. So for example, on first curve you might have RPM at 55% when coolant is at 28C, but 50% on second curve for the same coolant temp.

Hope this all makes sense, I had some dental work this morning so a bit doped up still... 😂

 

[Mickkey]

So, changing the speeds seems to have worked both on an 'overall loudness' level and from a resonance, however that's only when i'm barely using the PC, (idle or light browsing). Any game (Squad, Apex etc) brings the heat of the coolant up to the point where the fans will kick in nonetheless (on balance for reference) which is rather loud at 2k rpm.
Included the second screenshot for reference though i don't know what half of them are for.

Edit: To add aswell, this is with the CPU at about 30-35% usage, RAM at about the same, GPU at like 10%, so quite minimal loads..

 

[RichLan564]

I can't say for certain as my cooler is the H150i, so has 3 120mm fans and a 360mm cooler...however, these are my temperatures on a 7800x3D (the current version of your CPU) playing Jedi Survivor with the CPU at around 35% usage:

View attachment 37214

All things being equal, my cooler having a 3rd more fans and radiator combined with more workload and a higher level CPU (current gen vs last gen) is about right (a 3rd less would be around 1400rpm...an extra 400rpm for the higher demand of the CPU). So, fan speed wise etc, I'd say there's nothing wrong with yours. Hope that makes sense?

Mine would be howling like a banshee with fans at 1800, i would be able to hear it above headphones in game, i find my 5000D with H150i in anything but quiet to be honest, i have tested them by setting fixed speed an anything above 400RPM is noticeably audible

 

[Mickkey]

I can't say for certain as my cooler is the H150i, so has 3 120mm fans and a 360mm cooler...however, these are my temperatures on a 7800x3D (the current version of your CPU) playing Jedi Survivor with the CPU at around 35% usage:

View attachment 37214

All things being equal, my cooler having a 3rd more fans and radiator combined with more workload and a higher level CPU (current gen vs last gen) is about right (a 3rd less would be around 1400rpm...an extra 400rpm for the higher demand of the CPU). So, fan speed wise etc, I'd say there's nothing wrong with yours. Hope that makes sense?

Yeah looks like mine would sound similar to yours equivalent wise from your screenshot, surprising if you can't particularly hear it at those speeds. As in my previous post from suggestions on this forum, changing the curve/speed of the fans has definitely helped dramatically, in that if i keep them at around 600rpm or less i can't hear it over any game at all, nor is there oscillation, however when i had the fan speeds that low, the coolant temp steadily increased from it's default 30 or so up to about 38 before the curve kicked in and ramped up the fans.

I guess in my head when i built this new machine (with help from forum) it'd run quiete (or cooler) than my old i7-6700 with a CoolerMaster Hyper 212X air cooler...cause that thing was basically silent no matter what i put it through...

 

[B4zookaw]

You still need to allow fans to ramp up as coolant temp rises, my point was that the fans should operate at slightly different speeds to avoid resonance. So keep fan B 100 RPM lower than fan A at all times. So if Fan A is 500 RPM, B is 400, if Fan A is 800 RPM, B is 700, if Fan A is 1800 RPM, then B is 1700 etc

 

[Mickkey]

You still need to allow fans to ramp up as coolant temp rises, my point was that the fans should operate at slightly different speeds to avoid resonance. So keep fan B 100 RPM lower than fan A at all times. So if Fan A is 500 RPM, B is 400, if Fan A is 800 RPM, B is 700, if Fan A is 1800 RPM, then B is 1700 etc

Yeah i understand both your points, i think it has indeed helped with the resonance by having them on a slightly different RPM. My point was that I'm saddened that it seems like to gain performance with a new system, i've had to sacrifice 'comfort' in that noise levels are now massive in comparison.

You'd think that whilst beefier CPU's and GPU's would produce more heat, the heat removal would also improve and not just gain more noise to compensate.

 

[B4zookaw]

Yeah i understand both your points, i think it has indeed helped with the resonance by having them on a slightly different RPM. My point was that I'm saddened that it seems like to gain performance with a new system, i've had to sacrifice 'comfort' in that noise levels are now massive in comparison.

You'd think that whilst beefier CPU's and GPU's would produce more heat, the heat removal would also improve and not just gain more noise to compensate.

Well like all coolers, there's often better ones out there, based various metrics. I went from a Corsair cooler to an Arctic one as an example, and the Arctic is definitely quieter, to my ears at least.