Ed Cryer wrote:
The concept of two video cards in one box is new to me.
How would they operate? Or rather co-operate?
I can only think that one card would do the work, and simply use the
added RAM on the other card.
Ed
Each video card keeps a copy of the same textures.
They can work on every second scan line, for example.
https://en.wikipedia.org/wiki/Scalable_Link_Interface
And these guys started it as far as I know.
https://en.wikipedia.org/wiki/Voodoo2
Back in those days, your "regular" video card made
a VGA signal. And using short passthru cables, you cabled
the gamer cards in serially, after the regular video card.
The accelerators back then, would "lock" to the VGA video
signal, and "overlay" or remove a chunk of pixmap and
draw the game image on top of it. Apparently, with two
Voodoo cards, one would paint odd lines, the other paint
even lines. I own two of some version of those cards,
but never got mine to run properly. I only ever ran
one card at a time.
And there are other interleaving ideas besides doing it
at the scan line level.
https://en.wikipedia.org/wiki/Alternate_frame_rendering
https://en.wikipedia.org/wiki/AMD_CrossFireX
And that last article may be a bit dated, as there have
been attempts to fix micro-stutter.
Paul