can i remove case fans

[popflex05]

can i remove extra case fans and keep important ones like exhuast and and cooler fans but run them at a lower speed

my cooler is a hyper 212 led turbo the turbo version means it has 2 fans

 

[Barty1884]

Case fans? Absolutely. All case fans should be removable.

As for running fans at a lower speed, that'll depend on the PWM support, motherboard etc in question.

If any of your case fans are directly wired (via molex) to the PSU, then they'll run at 100% speed, nothing you can do about that.

 

[popflex05]

i mean will it imapct cooling i have an amd fx8320e overclocked to 4.3 at 1.37volts and a gtx 1050ti msi gaming i have 2 120mm pwm fans on my cooler and 1 120mm fan in my case and 2 around 80 to 60 mm fans i don't really know in the front and one very loud fan runs at 7k rpm amd 80mm stock fan that i got out of my stock cooler can i remove it and the 2 80 mm fans and run the pwm in a lower rpm because my pc is noisy and yes my motherboard can change pwm fans speeds will it impact cooling and if it will by how much

 

[Barty1884]

It depends on specifics, but generally, yes. Removing fans will restrict cooling (unless you happen to have fans counteracting each other currently), and running your fans at a lower RPM will limit the amount of heat they can move.

Exactly how much your temps will be impacted has so many factors, it's impossible to judge.

Generally speaking, opting for larger fans can be quieter - as they can move the same volume of air that multiple small(er) fans can. But some can be fairly loud too - although usually quieter than 60/80mm options.

You could look at specifically designed "quiet" fans from many different brands - I prefer Noctua myself.
They're quite due to fin design, can move sizeable volumes of air and can operate at pretty low RPM.