Does pci gfx card mem really increase Fast Mem ???

[Kronos]

Well you will save RAM, by having bitmaps stored in the GFX-card, but
since you are updateing fom pure AGAmost of the saved mem would
be Chip. Normally you will allways have ~1.9MB Chip free, and maybe
even a few bytes of Fast (dependeing on what patches you ran on AGA,
and what settings you use for the Voodoo).

[Kronos]

Yes you are wrong :-o

There are3 kinds of RAM in your system (only 2 atm to be precise).

1. FastMem: Those 16MB on the mobo
2. ChipMem: 2MB also on the mobo, much slower in access, but the only
kind of RAM that the AGA-chips can use (listed as GFX-Mem in the title-bar).
3. RTG-Mem: Everything on the GFX-card(won't be directly listed anywhere).

Now what you will want is this:

Redirect as much as possible from Chip to Fast as this is about 6 times faster.
Patches likes FastBlit will do that.

Once you get the Voodoo you might want to move any GFX-related data into
the RAM on the card freeing much-needed FastMem. That should happen on itself,
some GFXApps may have an option where you can select the type of mem to be
used for buffers and so.