Resolved Question

How to keep PC cool during hot days?

Jul 31, 2019 4:13AM PDT

My Acer Aspire XC-780 (Intel i5 - 6400 quad core processor @ 2.70GHz and 8 GB ram) is 2 years old, has low build up of dust inside and works fine.

It is currently very hot where I live and room temperatures reach up to 30 degrees Celsius. My desktop computer can get very hot during these times.
My computer is located inside a desk shelf. The computer fits nicely in their with plenty of space to the computer's right where the CPU fan blows out hot air. I am not sure if the power supply has a fan but if it does, there is a 5cm gap from behind the PC and the wall.

My CPU reaches 60 degrees Celsius when playing a low demanding game for about 10 - 20 minutes. When watching streaming movies or watching videos my CPU is at 45 degrees Celsius and when idle it is at 40 degrees. My motherboard gets minus 5 degrees than the CPU for each activity. Is this good or bad?

My question is how can I keep my computer cool during the summer months and also can I use a USB desk fan (4 inches) to cool down my computer in anyway? If so what position.

Post was last edited on July 31, 2019 8:14 AM PDT

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Best Answer

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Jul 31, 2019 10:11AM PDT

If there is a door on this shelf leave it open and test.

Remove the side panel from the pc and test.

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Not cool
Aug 1, 2019 9:02AM PDT

I leave my door open to the shelf thing most times but any idea about the USB fans?

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move the computer
Aug 1, 2019 9:23AM PDT

from the enclosed shelf , open the side panel and blow a fan inside the case .

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Fan position
Aug 1, 2019 10:28AM PDT

I can put the fan so that its facing towards to internal fan which is blowing hot air away from the CPU, i don't think that will help

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I believe
Aug 1, 2019 10:44AM PDT

the better question is "would it hurt to try "?

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RE: not cool
Aug 1, 2019 11:20AM PDT

I gave you 2 things to try that are cheap.
You seem fixated on this usb fan thing.
Try one and see what it does.

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At 60C it's fine.
Jul 31, 2019 8:50AM PDT

Given the story the PC seems to be cool enough.

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Can go over 60C
Aug 1, 2019 9:03AM PDT

On average when playing low demanding games it goes 60C for 20 mins however if I play long enough it goes to 70C.

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Tcase is 71C.
Aug 1, 2019 9:50AM PDT
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Air flow
Aug 1, 2019 10:34AM PDT

The computer has a 20cm gap where the CPU fan blows and there are no vents or fans on the other side. At the back is a 5cm gap and I have noticed that it gets hot at the back due to the power supply. For now I have placed a USB fan facing out to the front of the shelf for better air flow. Cool air gets in through the front vents, and hot air comes out from the fans blowing out which then further gets blown by the USB fan outside the shelf. Im not sure if this helps but I have noticed a few degrees drop in temp.

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About a USB fan
Aug 1, 2019 11:47AM PDT
If that fan is plugged into the PC you're attempting to cool, you're better off unplugging it. The fan draws power and the additional power requirement produces more heat than the fan can move out of the way. You're going backwards instead of forwards. It's similar to trying to cool a room by leaving the refrigerator door open. You end up with a hotter room instead.

Post was last edited on August 1, 2019 11:49 AM PDT

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