Will an AGP 8x card work in a 4x interface slot?

  • Thread starter Thread starter billybob
  • Start date Start date
Yes.

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- Show quoted text -

Not all will, I have a ATI X800 Pro that is only AGP8x compatable,
This is a genuine ATI card as well, so you should check the card
manufacturer for proper supported modes
 
* Custom Computers:
Not all will, I have a ATI X800 Pro that is only AGP8x compatable,
This is a genuine ATI card as well, so you should check the card
manufacturer for proper supported modes

He is right. *All* AGP 8x cards do work in AGP 4x slots, that's a fact.

BTW: the X800 Pro does work fine in AGP4x systems, too.

Benjamin
 
Benjamin Gawert said:
* Custom Computers:


He is right. *All* AGP 8x cards do work in AGP 4x slots, that's a fact.


No it isn't.

Not all AGP slots are physically the same!
Voltage means nothing is the card doesn't fit the slot!
 
No it isn't.

Not all AGP slots are physically the same!
Voltage means nothing is the card doesn't fit the slot!







- Show quoted text -

Yes there are two different AGP slots; AGP and AGP Pro but an AGP card
will work in AGP Pro slot, AGP Pro card will not work in a AGP slot.
But also if the card says it requirers AGP 8x compatible board like my
ATI X800 Pro and also says right on the box "damage will accur if used
in AGP 4x board" then you better not run it on a AGP 4x board the
voltage difference will destroy the card. Now granted this card was
one of the very first AGP 8x cards released and later versions are
backwards compatible with AGP 4x it doesn't mean that they all are
backwards compatible.
 
* PhxGrunge:
Not all AGP slots are physically the same!
Voltage means nothing is the card doesn't fit the slot!

Please read my answer in the nvidia group to this topic. The problem you
had was your fault because you tried to use an AGP4x/8x-only card (X800
Pro with PCI-AGP brigde that only does 1.5v/3.3v) in an AGP2x-only mobo
(ABit BH6). It's obvious that the card doesn't fit.

Benjamin
 
* Custom Computers:
Yes there are two different AGP slots; AGP and AGP Pro

AGP Pro is an enhancement of AGP (additional connector for providing
more power to the gfx card)...
but an AGP card
will work in AGP Pro slot, AGP Pro card will not work in a AGP slot.
But also if the card says it requirers AGP 8x compatible board like my
ATI X800 Pro and also says right on the box "damage will accur if used
in AGP 4x board" then you better not run it on a AGP 4x board the
voltage difference will destroy the card.

That's nonsense, running the X800 Pro in an AGP4x mobo with 1.5v
signalling voltage won't damage it. Either you read that wrong (maybe it
was "AGP 2x"), or it's a printing error or something like that.
Now granted this card was
one of the very first AGP 8x cards released and later versions are
backwards compatible with AGP 4x it doesn't mean that they all are
backwards compatible.

As I said in the Nvidia group we have all the specification papers for
Radeons and Geforce at work. The X800 Pro uses the Rialto brigde
(PCIe-to-AGP brigde) to connect to AGP, and this bridge *does* 1.5v and
0.8v (AGP4x and AGP8x). There is no X800 Pro that does "AGP 8x only" and
will be damaged in AGP 4x board, period.

As to other arguments that also support what I say see the thread in

Benjamin
 
Benjamin Gawert said:
* Custom Computers:


AGP Pro is an enhancement of AGP (additional connector for providing more
power to the gfx card)...


That's nonsense, running the X800 Pro in an AGP4x mobo with 1.5v
signalling voltage won't damage it. Either you read that wrong (maybe it
was "AGP 2x"), or it's a printing error or something like that.


As I said in the Nvidia group we have all the specification papers for
Radeons and Geforce at work. The X800 Pro uses the Rialto brigde
(PCIe-to-AGP brigde) to connect to AGP, and this bridge *does* 1.5v and
0.8v (AGP4x and AGP8x). There is no X800 Pro that does "AGP 8x only" and
will be damaged in AGP 4x board, period.

As to other arguments that also support what I say see the thread in

Benjamin

Your information only applies to new - last 4 years - motherboards. Not to
legacy motherboards made in the last 8 years.

The BH6 version 1.2 is 2x/4x. The original BH6 version 1.0 was only 1x/2x.
Your X800 Pro probably does not fit in the slot due to the edge connector
not having the extra cut in it, even though the voltages are right!

Read the paragraph after the 8X heading
http://en.wikipedia.org/wiki/Accelerated_Graphics_Port. There are currently
3 different versions of the AGP slot..

Specifications mean nothing unless the entire industry follows them! And
make it clear to the computer builder which is which. 4 flavors of speed
(1x, 2x, 4x, 8x), 3 flavors of AGP spec (original, 1, 2), and 3 flavors of
physical slots.
 
http://support.ati.com/ics/support/default.asp?deptID=894&task=knowledge&questionID=18872

Don't be silly. :-) If your ATi-branded X800 Pro doesn't work in a
4x-capable motherboard, then either your GART driver has issues, or the
motherboard has trouble running in 4x mode to begin with (and there are a
few like that, Asus P3V4X comes to mind...). What motherboard did you try
the card in?

Releasing an AGP 8x-only card is also suicide from a marketing standpoint.
 
* PhxGrunge:
The BH6 version 1.2 is 2x/4x.

Nope, its not. All BH6 versions use the intel 440BX chipset, and this
chipset is *always* AGP 2x only (3.3v). Not "2x/4x".
The original BH6 version 1.0 was only 1x/2x.

As is the version 1.2
Your X800 Pro probably does not fit in the slot due to the edge connector
not having the extra cut in it, even though the voltages are right!

Again for you in the hope you will finally get it: there is absolutely
*no* *mechanical* *difference* between AGP4x and AGP8x, period.
Read the paragraph after the 8X heading
http://en.wikipedia.org/wiki/Accelerated_Graphics_Port. There are currently
3 different versions of the AGP slot..

The AGP slot only has two mechanical keys for voltages, one for 3.3v and
one for 1.5v/0.8v. Mechanically, AGP 4x and AGP8x are the same.
Specifications mean nothing unless the entire industry follows them! And
make it clear to the computer builder which is which. 4 flavors of speed
(1x, 2x, 4x, 8x), 3 flavors of AGP spec (original, 1, 2), and 3 flavors of
physical slots.

A hardware maker must have been really stupid not to follow the AGP
standard, especially in voltage keying. And I know from first hand
experience that the Abit BH6 (even version 1.2) is no exception to that.

Benjamin
 
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