PCI slot - Fan coolers.

D

Derek

Hello all:

I'm planning on O/C my 9500 pro and bought a PCI slot "AGP" cooler. I've
installed it and noticed an immediate drop in case temps : )

My question is:

I've installed it in the PCI slot directly below the Vid card and I figure
that since the two fans are more or less "fighting" for the same air, both
fans must work harder than they normally would. I wanted to make sure that
it doesn't interfere or shorten the life span of the actual Vid card fan.

Should I drop the addon fan to the next PCI slot?

Derek
 
M

Michael W. Ryder

Derek said:
Hello all:

I'm planning on O/C my 9500 pro and bought a PCI slot "AGP" cooler. I've
installed it and noticed an immediate drop in case temps : )

My question is:

I've installed it in the PCI slot directly below the Vid card and I figure
that since the two fans are more or less "fighting" for the same air, both
fans must work harder than they normally would. I wanted to make sure that
it doesn't interfere or shorten the life span of the actual Vid card fan.

Should I drop the addon fan to the next PCI slot?

Derek
I have been using one with my 9700 Pro since it came out and have never
had any problems. It was needed in my case as a lot of 3D games were
crashing after 15 minutes and the video card was almost too hot to touch.
 
A

AseStar

Actually, the vid card fan is doing LESS work. Here is how. Your pci fan
blows air on the agp, thus air is more dense below agp. So your vid fan card
is now moving more air per cycle, than before.
It is very cheap and effective way to increase cooling.
 
W

Wblane

Some PCI slot coolers exhaust air from the case (instead of blowing air into
the case) in which case the below wouldn't be true.
Actually, the vid card fan is doing LESS work. Here is how. Your pci fan
blows air on the agp, thus air is more dense below agp. So your vid fan card
is now moving more air per cycle, than before.
It is very cheap and effective way to increase cooling.


-Bill (remove "botizer" to reply via email)
 
B

Bill Larcombe

If it's directly next to the GPU fan wont it exhaust hot air from the area
next to the VC to outside the case - that's got to be a good thing surely??

BillL
 
G

GMAN

Actually, the vid card fan is doing LESS work. Here is how. Your pci fan
blows air on the agp, thus air is more dense below agp. So your vid fan card
is now moving more air per cycle, than before.
It is very cheap and effective way to increase cooling.

The PCI clot fans are sucking air out and are sucking in the reverse direction
the Video cards fan blows. Yes they are fighting in different directions if
they are directly beneath one another.
 
D

Darthy

I have been using one with my 9700 Pro since it came out and have never
had any problems. It was needed in my case as a lot of 3D games were
crashing after 15 minutes and the video card was almost too hot to touch.


A good case would resove that issue. But not all cases are that good
;)
 
M

Michael W. Ryder

Darthy said:
A good case would resove that issue. But not all cases are that good
;)
I don't know if that is necessarily true. With PCI cards being upside
down so that all the hot parts and the fan are below the card there is
no easy way to move the hot air away from the card without an exhaust
fan in the area. If all GPU, heat sinks and fan were above the card so
that the normal air flow would move the air to the rear exhaust fan your
statement would be true, but that is not how PCI cards are made.
Maybe with a properly placed side fan exhausting the area, but the PCI
slot fan was cheaper and easier to implement.
 
J

Jim Davis

Actually, the vid card fan is doing LESS work. Here is how. Your pci fan
blows air on the agp, thus air is more dense below agp. So your vid fan card
is now moving more air per cycle, than before.
It is very cheap and effective way to increase cooling.

No, the slot fans blow air out of the case. The 9800 fan blow air away
from the card. Therefore the slot fan will take that air directly out
the case. Both fans will work normally .
 
J

JB

Derek said:
Hello all:

I'm planning on O/C my 9500 pro and bought a PCI slot "AGP" cooler. I've
installed it and noticed an immediate drop in case temps : )

My question is:

I've installed it in the PCI slot directly below the Vid card and I figure
that since the two fans are more or less "fighting" for the same air, both
fans must work harder than they normally would. I wanted to make sure that
it doesn't interfere or shorten the life span of the actual Vid card fan.

Should I drop the addon fan to the next PCI slot?

Derek

I tried an Antec slot fan leaving an extra pci slot between a 9800 pro and
the fan. The case temperature did not change so I removed the fan. Based
on your results I will try it next to the agp slot next time I open the
case.

I do not recall the gpu load during this test. But the gpu temp is going to
change significantly under heavy load so that's the condition under which
you should be making the measurements.
 
A

AseStar

Michael W. Ryder said:
Darthy wrote:
I don't know if that is necessarily true. With PCI cards being upside
down so that all the hot parts and the fan are below the card there is
no easy way to move the hot air away from the card without an exhaust
fan in the area. If all GPU, heat sinks and fan were above the card so
that the normal air flow would move the air to the rear exhaust fan your
statement would be true, but that is not how PCI cards are made.
Maybe with a properly placed side fan exhausting the area, but the PCI
slot fan was cheaper and easier to implement.

It is true. In thermodynamics, a heatsink that faces down, has lowest
efficiency.
Facing upward is good, but vertical position (air on both sides) is best. I
think the last was the INTENDED position of pci (and agp) cards when the ATX
was created. Remember original idea was to have desktop chassis (lying down
on desk) hence all cards would be in vertical position..
Too sad, the towers just about killed the cooling.
 
P

patrickp

It is true. In thermodynamics, a heatsink that faces down, has lowest
efficiency.
Facing upward is good, but vertical position (air on both sides) is best. I
think the last was the INTENDED position of pci (and agp) cards when the ATX
was created. Remember original idea was to have desktop chassis (lying down
on desk) hence all cards would be in vertical position..
Too sad, the towers just about killed the cooling.

I guess it's down to whatever bright spark decided to mount the mobo
on the right side of the case and access it from the left, rather than
the other way round.

That would also put the CPU (usually) at the bottom rather than the
top of the board, where it should be cooler (certainly with good
throughflow of air), and a big heatsink could be supported and
wouldn't have problems fouling the PSU. And that's quite apart from
having the heatsinks on top of the cards! Brilliant decision, eh?

patrickp

(e-mail address removed) - take five to email me
 
G

GMAN

Jim Davis said:
No, the slot fans blow air out of the case. The 9800 fan blow air away
from the card. Therefore the slot fan will take that air directly out
the case. Both fans will work normally .
That is not true, the GPU fan blows air into the heat sink and so placing a
slot fan sucking air away from the vid card is fighting against the direction
that the gpu fan blows.

Now if the PCI slot fan is not directly below the gpu fan, then i could see a
benefit since the slot fan would sorta carry away the air that is lingering
below the card.

A better choice is the get one of the arctic cooling VGA Silencer cooler
solutions

http://www.arctic-cooling.com/en/products/vga_silencer/
 
?

>

I've got the fan card that's twin fans facing the AGP card.

Doesn't get any heat out of the case, but HAMMERS the AGP card pretty
good when you turn it up. There's a slider for speed control, but I
hooked it up to a fan speed controller that allows me to turn it off
completely when I'm not playing games.
 
W

Wblane

I'd figure it would be a bad thing because both fans would be drawing air from
the same location and, if they're directly opposite to each other, reducing
the air flow that either fan gets by applying forces in directly opposite
directions.
If it's directly next to the GPU fan wont it exhaust hot air from the area
next to the VC to outside the case - that's got to be a good thing surely??

BillL


-Bill (remove "botizer" to reply via email)
 
D

Darthy

I guess it's down to whatever bright spark decided to mount the mobo
on the right side of the case and access it from the left, rather than
the other way round.

That would be intel who did the ATX spec. Remember, mobos were
originally designed for DESKTOP computers in which the CPU pointed up
and the expansion cards were vertacle, rather than to the side. When
they went with PCI/AGP, the reversed the cards to "point down" for
some odd reason, I think to allow a PCI & ISA slot share the same area
(otherwise you would lose a slot)

BTX flips the board around.
That would also put the CPU (usually) at the bottom rather than the
top of the board, where it should be cooler (certainly with good
throughflow of air), and a big heatsink could be supported and
wouldn't have problems fouling the PSU. And that's quite apart from
having the heatsinks on top of the cards! Brilliant decision, eh?

BTX again... the PSU is generally still on top, with the expansion
cards.... With INTEL making very HOT cpus (more than AMD) the new
design was needed.


- - - - -
Remember: In the USA - it is dangeroud to draw or write about Heir Bush in a negative way. The police or SS are called, people threaten to kill you. (What country is this again?)

- 15yr old boy in Washington was disciplined for drawing such images.
- White House blows cover of an undercover agent because her husband said there were no WMD (before the USA started the war) - her job was finding terrorist. (This makes sense?)
God bless the land of the free. Where you can burn the Constitution... Ashcroft does it every day.
 
P

patrickp

That would be intel who did the ATX spec. Remember, mobos were
originally designed for DESKTOP computers in which the CPU pointed up
and the expansion cards were vertacle, rather than to the side. When
they went with PCI/AGP, the reversed the cards to "point down" for
some odd reason, I think to allow a PCI & ISA slot share the same area
(otherwise you would lose a slot)

BTX flips the board around.


BTX again... the PSU is generally still on top, with the expansion
cards.... With INTEL making very HOT cpus (more than AMD) the new
design was needed.


- - - - -
Remember: In the USA - it is dangeroud to draw or write about Heir Bush in a negative way. The police or SS are called, people threaten to kill you. (What country is this again?)

- 15yr old boy in Washington was disciplined for drawing such images.
- White House blows cover of an undercover agent because her husband said there were no WMD (before the USA started the war) - her job was finding terrorist. (This makes sense?)
God bless the land of the free. Where you can burn the Constitution... Ashcroft does it every day.


Actually, Darthy, I was talking about the design of the cases rather
than the boards: if you mounted the board on the left rather than the
right side of the case, and accessed it by removing the right side of
the case, you'd have the configuration I was talking about. Could
even be worth trying - shouldn't be too difficult, at least with some
cases...

patrickp

(e-mail address removed) - take five to email me
 
D

Darthy

On Fri, 11 Jun 2004 23:33:40 GMT, Darthy
Actually, Darthy, I was talking about the design of the cases rather
than the boards: if you mounted the board on the left rather than the
right side of the case, and accessed it by removing the right side of
the case, you'd have the configuration I was talking about. Could
even be worth trying - shouldn't be too difficult, at least with some
cases...

(e-mail address removed) - take five to email me

I was aware of what you were saying... But it deesn't change what I'm
telling you about how BTX does flip things around.

There are 2-3 cases that are "upside down"

Here is such a case:
http://www.in-win.com.tw/home/explode/et515038001.pdf

But I don't think it has enough vents for good cooling.


- - - - -
Remember: In the USA - it is dangeroud to draw or write about Heir Bush in a negative way. The police or SS are called, people threaten to kill you. (What country is this again?)

- 15yr old boy in Washington was disciplined for drawing such images.
- White House blows cover of an undercover agent because her husband said there were no WMD (before the USA started the war) - her job was finding terrorist. (This makes sense?)
God bless the land of the free. Where you can burn the Constitution... Ashcroft does it every day.
 
P

patrickp

I was aware of what you were saying... But it deesn't change what I'm
telling you about how BTX does flip things around.

No, of course it doesn't, Darthy.

There are 2-3 cases that are "upside down"

Here is such a case:
http://www.in-win.com.tw/home/explode/et515038001.pdf

But I don't think it has enough vents for good cooling.
Looks like a very cramped case. Oddly, I looked at a few more of
their cases, and all of them had the left and right covers wrongly
labelled: i.e. the left cover was labelled as the right side one and
vice versa.

- - - - -
Remember: In the USA - it is dangeroud to draw or write about Heir Bush in a negative way. The police or SS are called, people threaten to kill you. (What country is this again?)

- 15yr old boy in Washington was disciplined for drawing such images.
- White House blows cover of an undercover agent because her husband said there were no WMD (before the USA started the war) - her job was finding terrorist. (This makes sense?)
God bless the land of the free. Where you can burn the Constitution... Ashcroft does it every day.


patrickp

(e-mail address removed) - take five to email me
 

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