Archived from groups: alt.comp.periphs.videocards.ati (
More info?)
On Wed, 09 Jun 2004 20:12:12 +0100, patrickp <me@privacy.net> wrote:
>On Wed, 09 Jun 2004 11:23:30 GMT, "AseStar" <a s e s t a r @ s t a r t
>. n o> wrote:
>
>>
>>"Michael W. Ryder" <mwryder@_worldnet.att.net> wrote in message
>>news:l0dxc.46932$_k3.1170954@bgtnsc05-news.ops.worldnet.att.net...
>>> 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.
>>
>
>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.