Thread: 120mm fan on top of case???
February 5th, 2010, 08:39 PM #1
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120mm fan on top of case???
Does it make sense to install a exhaust fan on the top of the pc the case since heat rises??
Right now I have 1 front intake and 1 side and 1 back exhaust.
Let me know what you think...
Ill see if I can get a pic or 2 up of the case
Last edited by N8N8N8; February 7th, 2010 at 10:26 AM.
February 5th, 2010, 08:48 PM #2
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not only makes lots of sense but has been done many times, several top of the line cases actually have them from the factory. Like the Antec line, the 1200, 900's and the 600 I know all have top mounted fans.
February 5th, 2010, 10:56 PM #3
Your side fan should actually be an intake...
February 5th, 2010, 11:02 PM #4
I have installed several top, fans in hot cases, and they work great.
You should make sure you need one, before you do all that work.
Take the side off your case, and place a window fan blowing into the case.
If the temp goes down, more case fans will help, but if the temp stays the same, more fans won't do a thing.
I agree side fans blow in.
You should have slightly more in than out, the higher the pressure, the better the heat transfer.
Last edited by stroyal; February 5th, 2010 at 11:04 PM.Hard Sayin Not Knowin
February 6th, 2010, 12:10 AM #5
my setup is side in top in back out. front in too (but thats mostly for my HDs and its a less powerful fan). works for me.
I wanted to do a top exhaust as well but I realized then I would have to have my CPU heatsink pointing upwards, which was quite impractical for my setup, maybe its different for yours, but my main problem was finding a way to feed it with air in that orientation.
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February 6th, 2010, 11:56 AM #6
Every case is different, it is mostly common sense.
I even had one years ago that the single rear fan worked better blowing in.
Rear fans are almost always out.Hard Sayin Not Knowin
February 6th, 2010, 02:26 PM #7
Video cards generally draw from inside the rig and exhause out the back, a side fan would seemingly compete with your vid card if it is exhausting too.
I got one of those cases, a 3T I think they call it, has a 240mm fan in the side, massive and great cooling with near silence. Don't understand why more manufacturers don't do this.
February 6th, 2010, 04:46 PM #8
My case has 2 120mm top and 1 rear for exhaust and I have a side and front for intake. Seems kinda like overkill to me but hey shipped me an extra fan so why not put it in. I like the added fan controllers too. Probably my only complaint would be the sheer amount of wires that I have to connect.
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February 7th, 2010, 01:37 AM #9
Three on bottom and one on top.
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February 7th, 2010, 02:54 AM #10
how about this one for top mounted fan, plus plenty of airflow from all directions LOL
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February 7th, 2010, 10:14 AM #11
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I currently have amd x4 965 cpu with a zelmen's 9700nt cpu cooler and the temps at idle are around 100 degrees F. Max temp is 144F. Dropped temp from stock fan a few degrees but fan is spinning a lower speed. I am using speed fan to monitor temps. It has cpu, hd, and 3 other fans which I image are my 3 case fans. All the temps are fine with normal using.
I ran prime 95 and the cpu temp goes about 137F which kind of scares me but the other 1 temp, I mguessing is the case fan but IDK what fan it is was about 147F so I shut the program down. Im thinking I might not have good enough cooling In the case witch is why im thinking of install a 120mm on the top and mabay another one on the side of the pc..
Any ideas or suggestions to this problem would be great.
February 9th, 2010, 01:22 AM #12
February 9th, 2010, 10:32 AM #13I ran prime 95 and the cpu temp goes about 137F which kind of scares me but the other 1 temp, I mguessing is the case fan but IDK what fan it is was about 147F so I shut the program down. Im thinking I might not have good enough cooling In the case witch is why im thinking of install a 120mm on the top and mabay another one on the side of the pc..
February 9th, 2010, 07:12 PM #14
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yes it was under a 100% load, temps were still slowly climbing so I stopped it.
Ideally where would be a good place to put another intake fan? I was thinking right next to the intake fan on the side panel, so it would be 2 80mm fans or should I go with mabay a 120 or 140mm fan instead of the 2 80mm fans and then all the way to the left near the back or the case on the side panel have 2 exhaust fans mabay 80mm on top of each other going vertically?
Would a top mounted (top of case fan) 120mm exhaust fan help?
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