Hexagonal holes problem and CPU fan recommendation

lorcav123 · August 1, 2019

Hello, I need advice about my case situation and fan recommendation.

- I have Define R5 and I put his stock fans to case fan controller. One stock fan is aimed at HDD cage (intake) and other is bottom intake. Problem is that when are fan on 7V I can hear sometimes humming noise like fan speed is going up and down. I read from this that this is known problem with R5 cases. From other posts:

"The humming is normally caused by the fans being too close to a hexagonal holes. I had the same problem on my Fractal XL R2."

"R5 is at fault, because of the shape of the holes. I tried with/without, different fans, and all different setups to isolate the issue. It is 100% the R5 top vents."

So can I solve this only but putting some smaller fan on bottom intake (120mm)? In reserve I have Noctua 120mm 700 redux but it can only work as far as I know on 12V so it will be needed to be connected to motherboard. Any other solution? I am pretty sure that bottm fan is the problem but I need to test it more.

- Other thing is that I want to replace my CPU fan which is Noctua industrial 3000, it has some buzzing noises (I read that is normal for those industrial fans?) and sometimes when I turn my PC during cold times I got a mesage that my CPU fan is no working. Than I restart computer and it starts normally, so maybe it start up with a delay and mbo after I turn PC on it recognises him as 0RPM at it gives that message? I have same situation with my previous board so fan must be the problem in this case. Any fan recommendation that doesn`t have problems (humming noise, PWM problems)?

My favorites (I want a silent fan with a good pressure):

- Coolermaster silencio 4pin 120mm

- Arctic Bionix P120 4pin

- Bequiet Silent wings 3 120mm 3 pin (I read that PWM versions has some problems)

Cooler is Coolermaster TPC 600, CPU is Ryzen R5 1600 but in future it will be replaced for some 12c Ryzen.

UrbanFreestyle · August 1, 2019

Might want to change your text colour. It;s showing black on dark theme.

UrbanFreestyle · August 1, 2019

I would look into the rubber fan damping mounts for the chassis fans. I have a noctua 140 as my cpu fan and haven't had any buzzing issues.

Have you tried holding parts of the case / mobo / fittings etc to see if you can work out where the buxxing is coming from?

lorcav123 · August 3, 2019

On 8/1/2019 at 11:30 AM, UrbanFreestyle said:

Might want to change your text colour. It;s showing black on dark theme.

In what color should i put it that won`t be conflict between light and dark theme?

On 8/1/2019 at 11:34 AM, UrbanFreestyle said:

I would look into the rubber fan damping mounts for the chassis fans. I have a noctua 140 as my cpu fan and haven't had any buzzing issues.

Have you tried holding parts of the case / mobo / fittings etc to see if you can work out where the buxxing is coming from?

It is a CPU fan, i think that buzzing noise is coming from motor area and I am pretty sure that Noctua is problem.

What about fan recommendations?