80mm exhaust worth it?

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SM125

SM125

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Jul 16, 2014
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I have a really cheap case with no case fans included and I didn't think I had any mounts for any either as it's an mATX case. Recently whilst looking inside I noticed there was actually a mount for an 80mm exhaust at the back.

The CPU idles at around 38-45 and sits at 55-65 under heavy loads.

I'm also going to be adding a discrete card soon as I'm going to be using the PC primarily for gaming soon which obviously makes cooling even more important.

The only problem I can see (which may be my inexperience) is that the exhaust looks like it will draw the hot air towards it (no sh*t) and end up being sucked in to the CPU cooler? But that's probably me being an idiot, so will it make enough of a difference? Any help is appreciated and I apologise for the essay haha
 
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B
250w is not enough for any GPU that can be considered an upgrade to integrated grpahics, so you will need to upgrade the psu. Look at something that is 80+ certified form seasonic, xfx, antec, corsair (not cx series), or rosewill hive/capstone serries. For a 270x a 450w should be enough but I would shoot for 500-550 for that extra wiggle room

The two different size holes are most likely for 80mm or 92mm fans.
For case fans and cooling: bigger = better.
You want the best cfm number as i stated earlier. If you want it to have long life then do not get sleve-bearing fans as they fail the quickest.

I would go with one of these two:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835209004...
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avarice

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check the flow by placing a peice of paper next to the outside of the fan and see where it goes.

as for an 80mm fan - not a whole lot of airflow there.

What may be a better option for the long term - is to get a case with 2-120mm in and 2-120mm out. It will likely only cost you aroun $100 and provide good airflow.
 
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boosted1g

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Jun 12, 2013
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You should have an exhaust fan irregardless.
Is your PSU top mount or bottom mount in your case (mounted at the top or bottom)?
If top mount then your PSU acts as a exhaust fan which is good, but the hot air is now the "fresh" intake air for the psu so the psu will not last as long.

If you are adding a high end GPU then you likley will start running into cooling issues. Most of us have at least 3 120-140mm fans as exhaust and 1-2 fans for intake. If adding something like a 750ti or bellow then you might be ok if you get a decent exhaust fain.

Since it is the only fan, try to get one with the highest cfm which is a measure of the volume of air it can suck/blow in a minute. Unfortunatly 80mm fans do not have the same noise/flow rate as the larger fans do. If your exhaust port has multple fan mount holes then it might be for a 92mm fan, in the case of pushing air bigger is better.
 
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SM125

SM125

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Yeah, the psu is top mounted so it's been acting as quite a good exhaust for now but the psu itself is a cheap pre installed FSP one, so that's probably going to die soon.

I was planning on adding an R9 270x or something similar.

The mount I found has two different sized holes, a smaller size on the bottom left and top right and a slightly later size on the top left and bottom right, is this to cater for more brands on fan? Or is this even a fan mount haha
 
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avarice

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FSP is not a 'cheap' brand - but they do have a wide range of products. FSP is a major manufacturer of PSUs and are well regarded in the space. They are not as good as a SeaSonic or a Zippy - but they are solid.

I would still suggest a new case with proper ventalation.
 
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SM125

SM125

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I know they're not a cheap brand, I was referring to the fact it's one of their small 250w psu's but I didn't end up mentioning the size of it. In the long run I will eventually upgrade the case but at the moment this case is doing it's job.
Any 80mm exhaust fans recommendations?
 
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boosted1g

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Jun 12, 2013
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250w is not enough for any GPU that can be considered an upgrade to integrated grpahics, so you will need to upgrade the psu. Look at something that is 80+ certified form seasonic, xfx, antec, corsair (not cx series), or rosewill hive/capstone serries. For a 270x a 450w should be enough but I would shoot for 500-550 for that extra wiggle room

The two different size holes are most likely for 80mm or 92mm fans.
For case fans and cooling: bigger = better.
You want the best cfm number as i stated earlier. If you want it to have long life then do not get sleve-bearing fans as they fail the quickest.

I would go with one of these two:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835209004
http://www.newegg.com/Product/Product.aspx?Item=N82E16835186077
 
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boosted1g

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Jun 12, 2013
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Make sure you install the fan in the proper direction. Mounting it backwards and making it an intake fan will be worse then no fan at all because it will suck in all the air your psu is exhausting (and doing this cycle over and over agian) and will cause a lot of turbulent air in your case and the end result will be very bad for your cpu.
 
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SM125

SM125

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I wouldn't call it "high end" with an A10-6800k and an R9 270. The way the setup is now it's running relatively cool so until cooling problems appear I should be good. However I will get a new case when I've for the money, I'm stretching the budget as it is.
 
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Shantanu Ghose

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Sure,but in the meantime do get an exhaust fan in there,,something is better than nothing,,and always monitor the temps too.
 
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Magneson

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I have an Antec 900 which has a 200mm fan on top, 2x 120mm intake fans and 1x 120mm exhaust fan. Each has its own speed controller and its the best case I have ever used. The 200mm top fan is so quiet you can barely even hear it.
 
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