Desktop overheating

[wcso1]

My HP Omen 875 desktop keeps overheating, even when I'm doing nothing on it.  Core Temp's software shows a high temp. The fan runs often and fast. I can significantly reduce the temp and fan use by taking off the glass side panel. Then the system stays cool and the fan hardly runs at all. What's up? Is the system under-cooled? Can a better fan help?

[itsmyname]

@wcso1 --  Can a better fan help?

Definitely. Also, does your desktop computer have a fan mounted on the inside of the back of the case?

Adding another fan will move more heated air out of the case, and pull more cooler (room-temperature) air into your computer's case.

If the back of the computer (exhaust for the power-supply) is near a wall, that is not good -- move the computer away from the wall.

How old is the computer?  Dust & pet hair, trapped inside the computer, can impede the air-flow.

Disconnect the power, and remove the side panel, and use part of a can of compressed air to try to dislodge all the dust.

It is normal for the fan to spin faster, making more noise, when the temperatures inside the case increase.

[wcso1]

Adding another fan is difficult. The only other fan area on the back side has the Geforce RTX attached to it. There is a water cooler setup on the CPU that already covers all the top of the case. The bottom of the case has air-flow vents but no way of securing attaching a fan.

Dust isn't a problem. The case ifs clean now. I blow it out every few months and the room inn which the system is located has very little dusk. The case isn't against any walls, instead on a desk with plenty of space on all sides. I have the case raised up off the desk by 2 inches with supports to increase air intake from bottom.

The only way I can stop the overheating and excessive high-peed fan run to cool the case is to remove the side glass panel, which eliminates the problem. With the glass side on, the fan is coming on and running fast very often, even when I have no programs running.

The system is 2 years old.

[itsmyname]

@wcso1 -- Adding another fan is difficult

Years ago, a local independent computer-store owner was able to cut a hole into the side-panel, and mount a case-fan in that hole, with a nice "grill" to keep fingers from getting close to the fan blades.  Admittedly, he was cutting into a metal side-panel, while you have a "glass" side-panel.

That person is now manufacturing cases made out of acrylic, not "glass". Sample:

     GRANDE II PC Case | ClearPC (archive.org)

Obviously, he can cut holes anywhere in the case, and can mount a motherboard anywhere inside the case.