Its like you putting a plastic bag over your head or sticking your nose into the carpet.
Bottom mounted psu on carpet.
Hot air rises and cool air you get the point.
If it s on carpet flooring then the fan my not even be able to push enough air through.
No matter how you slice it carpet area rugs are bad for cases with bottom psu intakes it introduces fibers hair skin dust into the fan of the psu thus creates more heat doesnt allow for proper airflow plus increases failure rate of psu and a fire hazard.
Never put your computer case on the carpet when you have a bottom mounted psu fan facing downwards.
2014 10 26 09 47 26 you could also just take two short sticks and set the computer on top of those.
Bottom mounted psu fan facing up or down.
You ll end up blocking off the airflow.
My computer sits on my desk and imo i would never set a computer on carpet.
Life is like stepping onto a boat which is about to sail out to sea and sink.
Being placed at the top of the case a power supply could.
My psu is mounted in the bottom of my case a tj07.
Personally i m not a fan of the air intake being underneath the case for the psu.
When intel designed the atx form factor the power supply fan was designated as the primary case fan.
The carpet will block the airflow to the psu and in worst cases if you have no psu fan filter installed then the small fiber particles from the carpet can get deposited inside your psu and may also clog up your psu fan.
Dust is going to get blown around no matter where the psu is mounted.
A lot of this has to do with the configuration of your mobo and case.
In my case i get cool air for the intake and the hot air goes out the side of the case.
Mounting a psu in the top of the case should be ok as long as it vents to the top.
If your pc is on the floor then a bottom mounted psu would blow heat out the bottom of your case.