[geeks] AGP irritations (64bit PCI)

[Kevin]

It's a "keyed" AGP 4x slot.  The Pro slots are a bit longer than normal(1) AGP slots.  Apparently, some mobos require an AGP 1.5volt card and will be damaged by others, so they have AGP slots that are keyed to only allow 1.5volt cards.

This site sheds some light on the topic.
http://www.directron.com/15agpguide.html

Wasn't there a thread here a while back about how AGP was just a marketing ploy by Intel and that 64bit/66mhz cards would have worked out just fine?

Thanks,
/KRM

(1) if such a thing as "normal" AGP actually existed we wouldn't be having this discussion.

On Thu, 26 Jun 2003 13:50:35 -0400 (EDT)
vance at neurotica.com wrote:

> On Thu, 26 Jun 2003, Kevin wrote:
> 
> > Theoretically, can plugging an AGP 2x card into a 4x slot cause
> > problems?  Is there any reasons why they would not be backward
> > compatible?
> >
> > AGP is a PITA!  I received a Number Nine AGP 2x card (with an SGI 1600SW
> > LCD) and i now cannot use it in the intended location because the mobo
> > has an AGP 4x slot, of the particular variety that makes using a 2x card
> > physically impossible.  Is there some reason mobo manufactures would be
> > doing this as opposed to using universal AGP slots?
> >
> > Not to rehash the "x86 is crap" arguments from earlier but unpleasant
> > surprises like this can be added to the list of x86 downfalls.  Now i'm
> > forced to the buy the overpriced SGI adapter box or another AGP card
> > with the funky OpenLDI (Micro Centronics) connector.
> 
> I think you have an AGP Pro slot.  They're rated for higher
> power-consumption cards.  AGP Pro isn't compatible with AGP.
> 
> Peace...  Sridhar


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