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Power Supply mounting confusion



 
 
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  #1  
Old May 19th 04, 06:20 PM
Charlie
external usenet poster
 
Posts: n/a
Default Power Supply mounting confusion


OK, I've gotten the bug to build my own computer. Having never done this
before I have been lurking on this group for a while and I've been
searching the internet for information. I have decided to build a computer
based on the Athlon XP processor. I have found that AMD, in their
"Builders Guide for Desktop/Tower Systems" case guidelines, recommends the
use of a "bottom air intake" power supply.

http://www.amd.com/us-en/assets/cont..._tech_docs/260
03.pdf

The logic of this seems obvious yet I have been unable to find a single
power supply with specifications stating that it brings in air from a
bottom intake or fan.

Many power supplies have a fan on the top. I'm unsure why since most of the
cases I've seen do not have a hole on the top to match. Then I thought I
would just turn the power supply upside-down, but no, the mounting screw
pattern is not symmetrical and the few cases that show the hole pattern
orient the powersupply with the fan up. I did find a site that shows how
to butcher your "incorrectly" built case to fit an upside-down power
supply.

http://www.directron.com/powermod.html

I would have no problem with altering a case or for that matter the power
supply to mount upside-down but seeing as they went to the trouble to make
the screw pattern different top to bottom I figured there must be a reason.

Am I missing something?

Do some cases have the mounting holes oriented so that the power supply
mounts upside down?

Could anyone here point me to a good 400+ watt power supply with a bottom
intake vent or fan?

Thanks

Charlie



  #2  
Old May 19th 04, 06:57 PM
wooducoodu
external usenet poster
 
Posts: n/a
Default

no PSU has a fan on top, you're looking at them upside down.

"Charlie" wrote in message
...

OK, I've gotten the bug to build my own computer. Having never done this
before I have been lurking on this group for a while and I've been
searching the internet for information. I have decided to build a

computer
based on the Athlon XP processor. I have found that AMD, in their
"Builders Guide for Desktop/Tower Systems" case guidelines, recommends the
use of a "bottom air intake" power supply.


http://www.amd.com/us-en/assets/cont..._tech_docs/260
03.pdf

The logic of this seems obvious yet I have been unable to find a single
power supply with specifications stating that it brings in air from a
bottom intake or fan.

Many power supplies have a fan on the top. I'm unsure why since most of

the
cases I've seen do not have a hole on the top to match. Then I thought I
would just turn the power supply upside-down, but no, the mounting screw
pattern is not symmetrical and the few cases that show the hole pattern
orient the powersupply with the fan up. I did find a site that shows how
to butcher your "incorrectly" built case to fit an upside-down power
supply.

http://www.directron.com/powermod.html

I would have no problem with altering a case or for that matter the power
supply to mount upside-down but seeing as they went to the trouble to make
the screw pattern different top to bottom I figured there must be a

reason.

Am I missing something?

Do some cases have the mounting holes oriented so that the power supply
mounts upside down?

Could anyone here point me to a good 400+ watt power supply with a bottom
intake vent or fan?

Thanks

Charlie





  #3  
Old May 19th 04, 08:40 PM
Matt
external usenet poster
 
Posts: n/a
Default

Charlie wrote:

Could anyone here point me to a good 400+ watt power supply with a bottom
intake vent or fan?


Practically all of 'em.

  #4  
Old May 19th 04, 09:32 PM
Alex
external usenet poster
 
Posts: n/a
Default

2 upside-downs make it right ;-) The fan is meant to go on the bottom, not
the top of the unit.



"Charlie" wrote in message
...

OK, I've gotten the bug to build my own computer. Having never done this
before I have been lurking on this group for a while and I've been
searching the internet for information. I have decided to build a
computer
based on the Athlon XP processor. I have found that AMD, in their
"Builders Guide for Desktop/Tower Systems" case guidelines, recommends the
use of a "bottom air intake" power supply.

http://www.amd.com/us-en/assets/cont..._tech_docs/260
03.pdf

The logic of this seems obvious yet I have been unable to find a single
power supply with specifications stating that it brings in air from a
bottom intake or fan.

Many power supplies have a fan on the top. I'm unsure why since most of
the
cases I've seen do not have a hole on the top to match. Then I thought I
would just turn the power supply upside-down, but no, the mounting screw
pattern is not symmetrical and the few cases that show the hole pattern
orient the powersupply with the fan up. I did find a site that shows how
to butcher your "incorrectly" built case to fit an upside-down power
supply.

http://www.directron.com/powermod.html

I would have no problem with altering a case or for that matter the power
supply to mount upside-down but seeing as they went to the trouble to make
the screw pattern different top to bottom I figured there must be a
reason.

Am I missing something?

Do some cases have the mounting holes oriented so that the power supply
mounts upside down?

Could anyone here point me to a good 400+ watt power supply with a bottom
intake vent or fan?

Thanks

Charlie





  #5  
Old May 19th 04, 11:17 PM
Mark
external usenet poster
 
Posts: n/a
Default

I've been using an Allied 400W PSU that I got at Newegg.com for about
US $36. It may not be a "true" 400W unit, but it has been stable for
the several months that I've owned it. It is a dual-fan (pulls up
from the bottom fan and expels through the back one) model with plenty
of power connectors. I believe this model is "AMD-approved" for what
it's worth.

"Charlie" wrote in message ...
OK, I've gotten the bug to build my own computer. Having never done this
before I have been lurking on this group for a while and I've been
searching the internet for information. I have decided to build a computer
based on the Athlon XP processor. I have found that AMD, in their
"Builders Guide for Desktop/Tower Systems" case guidelines, recommends the
use of a "bottom air intake" power supply.

http://www.amd.com/us-en/assets/cont..._tech_docs/260
03.pdf

The logic of this seems obvious yet I have been unable to find a single
power supply with specifications stating that it brings in air from a
bottom intake or fan.

Many power supplies have a fan on the top. I'm unsure why since most of the
cases I've seen do not have a hole on the top to match. Then I thought I
would just turn the power supply upside-down, but no, the mounting screw
pattern is not symmetrical and the few cases that show the hole pattern
orient the powersupply with the fan up. I did find a site that shows how
to butcher your "incorrectly" built case to fit an upside-down power
supply.

http://www.directron.com/powermod.html

I would have no problem with altering a case or for that matter the power
supply to mount upside-down but seeing as they went to the trouble to make
the screw pattern different top to bottom I figured there must be a reason.

Am I missing something?

Do some cases have the mounting holes oriented so that the power supply
mounts upside down?

Could anyone here point me to a good 400+ watt power supply with a bottom
intake vent or fan?

Thanks

Charlie

  #6  
Old May 19th 04, 11:35 PM
DaveW
external usenet poster
 
Posts: n/a
Default

Antec 430 Watt Tru-Power power supply. Excellent choice, built ruggedly,
and conservatively rated.

--
DaveW



"Charlie" wrote in message
...

OK, I've gotten the bug to build my own computer. Having never done this
before I have been lurking on this group for a while and I've been
searching the internet for information. I have decided to build a

computer
based on the Athlon XP processor. I have found that AMD, in their
"Builders Guide for Desktop/Tower Systems" case guidelines, recommends the
use of a "bottom air intake" power supply.


http://www.amd.com/us-en/assets/cont..._tech_docs/260
03.pdf

The logic of this seems obvious yet I have been unable to find a single
power supply with specifications stating that it brings in air from a
bottom intake or fan.

Many power supplies have a fan on the top. I'm unsure why since most of

the
cases I've seen do not have a hole on the top to match. Then I thought I
would just turn the power supply upside-down, but no, the mounting screw
pattern is not symmetrical and the few cases that show the hole pattern
orient the powersupply with the fan up. I did find a site that shows how
to butcher your "incorrectly" built case to fit an upside-down power
supply.

http://www.directron.com/powermod.html

I would have no problem with altering a case or for that matter the power
supply to mount upside-down but seeing as they went to the trouble to make
the screw pattern different top to bottom I figured there must be a

reason.

Am I missing something?

Do some cases have the mounting holes oriented so that the power supply
mounts upside down?

Could anyone here point me to a good 400+ watt power supply with a bottom
intake vent or fan?

Thanks

Charlie





  #7  
Old May 20th 04, 01:33 AM
Andy
external usenet poster
 
Posts: n/a
Default

On Wed, 19 May 2004 13:20:58 -0400, "Charlie"
wrote:

Could anyone here point me to a good 400+ watt power supply with a bottom
intake vent or fan?


http://store.4linkcomm.com/wow640blatxp1.html


Thanks

Charlie


  #8  
Old May 20th 04, 02:10 AM
Charlie
external usenet poster
 
Posts: n/a
Default


"wooducoodu" wrote in message
. com...
no PSU has a fan on top, you're looking at them upside down.


Ah, the old display power supplies upside-down trick. Well they got me.

Thanks,

Charlie



  #9  
Old May 20th 04, 02:28 AM
Charlie
external usenet poster
 
Posts: n/a
Default


"Matt" wrote in message
...
Charlie wrote:

Could anyone here point me to a good 400+ watt power supply with a

bottom
intake vent or fan?


Practically all of 'em.


Well, the power supplies made by PC Power & Cooling are often recommended.
So the first one I looked at (410 ATX) can be seen at:

http://www.pcpowercooling.com/produc...uiet/silencers
/index.htm

It appears to have no vent or fan on the bottom assuming that it is
displayed upside-down.

I then decided on an Antec TruePower True430.

http://www.antec-inc.com/us/pro_powerSupply.html

This does show a fan on the bottom, I just wasn't aware that everyone
displays their power supplies upside-down.

Thanks,

Charlie






  #10  
Old May 20th 04, 02:33 AM
Charlie
external usenet poster
 
Posts: n/a
Default


"Alex" wrote in message
...
2 upside-downs make it right ;-)


Honest, I'm not standing on my head and let me check... No my monitor isn't
upside-down.

The fan is meant to go on the bottom, not the top of the unit.


Thanks,

Charlie





 




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