Cooling my PC

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Jackbres11

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Nov 12, 2013
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So the case I have is a Corsair 300R Mid Tower case and I would like to purchase Cooler Master Sleeve Bearing 120mm Blue LED Silent Fan. This will work on the top of my PC as intake fans right? It says the PC can use 120/140mm fans but I'm just making sure XD. I'm a PC scrub.

Thanks
 
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Karadjgne
That would make 3 intakes and 1 exhaust, all fans being roughly equal, and there is no way that single exhaust can possibly output even close to what is being input, so all the excess heat and hot air is circulated back into the cpu and gpu. It would solve nothing. Slightly is good, excessive is bad.

Ideally, 2x front intakes, 2x top exhaust. Run the intakes 100-200rpm higher. I'm not a big fan of side intakes as the air there is 90° offset from natural flow. It disrupts it. If you have a hot running gpu such as a r9 290x then a slow intake breeze over the gpu would be a benefit, but not a fast hard flow, it creates circulation, not flow.

So 2-in and 2-out with a little more in than out and you'll be good. I'd also try and use the...
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Gunmetal_61

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Jun 12, 2014
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It depends on the mount location in the case. Some mounts in the case are larger than others. For example, the top might accept 140mm, the front intake may only accept 120mm. Of course, there are some which will allow 120/140 or even 200mm fans in the same place via multiple mounting holes to accommodate each size. Just check the case specs to make sure that it is the top that accepts 120mm fans.

Otherwise, it's hardly a difficult matter compared to all the other things you could do with your PC. You see fan size number, you see case mount size number, you match fan to case mount.

One thing though, I'm not sure if the top is the best area for an intake. Usually, the setup goes that the rear and top are exhausts, and the front and side are intakes.
 
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Jackbres11

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Nov 12, 2013
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Thanks for the quick reply. Right now I have a single intake fan at the front of my PC and the outtake in the back. However, when I'm playing games my PC can get kind of hot and my room heats up. Instead of putting the fans on the top should I put them on the side panel as intake? BTW my motherboard is the Asus M5A97 R2.0 ATX AM3+ Motherboard. It should have plenty of places to plug in fans right?
 
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Karadjgne

Karadjgne

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Hot air rises. Heat rises. I would highly recommend against using top mounted fans as intakes. Intakes should be a low as possible to draw in the coolest air, and as geographically far away from hot exhausts as possible. So intakes on the bottom/low front, exhausts on top/high rear.

You also want to maintain a slightly higher intake than exhaust. This has the affect of pressurizing the inside of the case forcing air out of any extra vent holes or cracks instead of drawing in extra air through un-filtered vents. Means a lot less dust inside.

Many folk use led fans, either exclusively, or as front intakes or rear exhausts, so you can put your led fan wherever it fits, just pay attention to orientation.
 
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Jackbres11

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So would 2 120mm fans on the side of my case as intake be fine?
 
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Karadjgne

Karadjgne

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That would make 3 intakes and 1 exhaust, all fans being roughly equal, and there is no way that single exhaust can possibly output even close to what is being input, so all the excess heat and hot air is circulated back into the cpu and gpu. It would solve nothing. Slightly is good, excessive is bad.

Ideally, 2x front intakes, 2x top exhaust. Run the intakes 100-200rpm higher. I'm not a big fan of side intakes as the air there is 90° offset from natural flow. It disrupts it. If you have a hot running gpu such as a r9 290x then a slow intake breeze over the gpu would be a benefit, but not a fast hard flow, it creates circulation, not flow.

So 2-in and 2-out with a little more in than out and you'll be good. I'd also try and use the 140mm fans, as that's the largest your mounts will handle. (if you have 140 intakes and 120 exhausts run same speed, 140s naturally move more air)
 
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