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2006-04-13 06:58:29
Tunacommy
Member
+56|6907|Massachusetts, USA
Again - a noob looking for advice.

I just purchased this PSU from Enermax:

http://www.enermaxusa.com/catalog/produ … 983ebe1960

The fan is on the top/bottom of the unit.....

Should I mount this with the fan pointing down (toward the inside of the case) or up.  Not sure if it matters.

Also, I have been reading about ventilation of ATX cases.  I have a standard case with one 120mm fan in front and one 120mm fan in back.  Should I pull air in from the front and push it out through the back?  Or should I point them both in and push both sides in creating positive pressure in the case?  Again, not sure if it really matters.  I have passive side venting in the case as well (http://www.amselectronics.com/AMS%20CF-2229BK.pdf).

Thanks again,
2006-04-13 07:35:42
MaddOps
Who the hell elected you leader of this outfit?
+55|6884
From all my reading, you have to make sure hot air gets out, so I'd have a vent or at least a blowhole on top.

The Psu I personally would setup to have it's main fan OUTSIDE facing fresh air.  Then when it generates heat it's not adding to heat in the case nor it it trying to cool itself with hot air.

Just my $0.02
2006-04-13 09:51:01
The Stillhouse Kid
Licensed Televulcanologist
+126|6928|Deep In The South Of Texas
You should set your fans to pull air in from the front and blow it out the back.

As for the PSU,  I believe since it's a single fan that it actually pulls air out of the case, so it'd probably be best to mount it fan down. I could be wrong, but I can't think of any reason why they would design a PSU to exhaust it's hot air into the case.
2006-04-13 10:14:18
MaddOps
Who the hell elected you leader of this outfit?
+55|6884

The Stillhouse Kid wrote:

You should set your fans to pull air in from the front and blow it out the back.

As for the PSU,  I believe since it's a single fan that it actually pulls air out of the case, so it'd probably be best to mount it fan down. I could be wrong, but I can't think of any reason why they would design a PSU to exhaust it's hot air into the case.
I've had psu's that have pulled cool air in from the back and by proxy into the case.
Cept when the PSup gets hot it cools in the back and vents hot air into the case. 

I've seen them before.

But if you have one exhausting air from the case it'd be pulling hot air through the power supply.  Hotter it gets, less power you have.  So by flipping it and mounting it "upside down" it never contributes or detracts to the case air, cooling itself on it's own and giving all the power necessary to those monster SLI setups and such.

Just one man's thoughts.
2006-04-13 10:19:18
Tunacommy
Member
+56|6907|Massachusetts, USA
Thanks guys - I have heard of the "pull air in from the front, push it out the back" type of set up....it makes sense, hot air rises and leaves the computer out the top. 

I think I will mount the PSU so the fan is pointing IN and exhausting THROUGH the PSU and out the back.  If I have to, I guess I can switch it later. 

I have not even looked closely at it yet - it might only mount one way which would be idiot proof for guys like me!!

thanks again
2006-04-13 10:29:50
slo5oh
Member
+28|6947

Tunacommy wrote:

Thanks guys - I have heard of the "pull air in from the front, push it out the back" type of set up....it makes sense, hot air rises and leaves the computer out the top. 

I think I will mount the PSU so the fan is pointing IN and exhausting THROUGH the PSU and out the back.  If I have to, I guess I can switch it later. 

I have not even looked closely at it yet - it might only mount one way which would be idiot proof for guys like me!!

thanks again
If you look at the bolt in the power supply, line it up with the bolt holes in your case you'll notice that it can only line up one way.
You will end up with the fan "facing" down.  That's usually the only way PSUs line up.  99.9% of cases do not have a vent in the top of the case where the PSU is located so if you mounted it upside down you'd have your fan facing a soild wall of steel (or alum).  Now, I'm not sure what direction the fan is spinning, but usually they will draw air from inside the case and blow it out the back of the PSU.
2006-04-13 10:32:29
Agent_Dung_Bomb
Member
+302|7022|Salt Lake City

Tunacommy wrote:

Thanks guys - I have heard of the "pull air in from the front, push it out the back" type of set up....it makes sense, hot air rises and leaves the computer out the top. 

I think I will mount the PSU so the fan is pointing IN and exhausting THROUGH the PSU and out the back.  If I have to, I guess I can switch it later. 

I have not even looked closely at it yet - it might only mount one way which would be idiot proof for guys like me!!

thanks again
Your statement here is correct on all points.
2006-04-13 15:12:37
slo5oh
Member
+28|6947
oh...
VERY nice PS. 
2006-04-14 06:10:46
Tunacommy
Member
+56|6907|Massachusetts, USA

slo5oh wrote:

Tunacommy wrote:

Thanks guys - I have heard of the "pull air in from the front, push it out the back" type of set up....it makes sense, hot air rises and leaves the computer out the top. 

I think I will mount the PSU so the fan is pointing IN and exhausting THROUGH the PSU and out the back.  If I have to, I guess I can switch it later. 

I have not even looked closely at it yet - it might only mount one way which would be idiot proof for guys like me!!

thanks again
If you look at the bolt in the power supply, line it up with the bolt holes in your case you'll notice that it can only line up one way.
You will end up with the fan "facing" down.  That's usually the only way PSUs line up.  99.9% of cases do not have a vent in the top of the case where the PSU is located so if you mounted it upside down you'd have your fan facing a soild wall of steel (or alum).  Now, I'm not sure what direction the fan is spinning, but usually they will draw air from inside the case and blow it out the back of the PSU.
exactly right - I installed last night and it would only go in one way.....fan facing in.  Have not fired it up yet to make sure if pulls air out the back of the PSU - but I don't see why it wouldn't...unless I wired it wrong.  thanks.

 

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