AGP bandwidth question

Archived from groups: alt.comp.periphs.videocards.nvidia (More info?)

On Tue, 24 Aug 2004 18:23:04 +0200, Antonio Bleile
<dont.use.this.mail@foo.com> wrote:

>I'm trying to find out about AGPx8 read and
>write performance. The "x8" means that write
>operations are 8 times faster than for AGPx1,
>correct?

data transfer between different modes is ment IMHO in read mode
from chipset to video card & rappresent only theorethical max
bandwith, which is very very very rarely used (practically never,
bandwith gets never satureted, mostly marketing!)
there is practicaly no difference /real life, not benchmarks/ between
speed of Agp2x and more /after 2x to 4x or to 8x there is only few %
of improvement in benchmarks/.

Speed of Agp transfer has nothing to do with slot/connecting standards
directly; but different AGP X.x standards define different Agp voltage
signaling to, so be carefuly which AGP slot of MoBo or Video card
supports (check manuals!)

>What about read operations? Are they
>always the same for AGPx2, AGPx4 and AGPx8?
>Is AGP a one way street?

IMHO is 2Way street, but sending data from video card to the rest of
machine is way slower (write) than read in oposite way.
(example: similar behavior like ADSL modems, upload is way slower than
download) ...
--
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