AGP slot questions/and integrated video

have a few dumb questions, please tell me if I should have put this in
the motherboard section.

In short I need someone to explain some computer parts and terminology
for me. What what is an AGP adapter what is the difference between
4X AGP and 8X AGP. When it says 32 MB shared memory on the opening
screen, which I think is the BIOS, is that associated with integrated
video?

If you are wondering why I am asking these questions, this is the
situation. My motherboards booklet says has a 4X AGP slot the
website I bought it from say it is an 8X AGP slot. But it does say
"8x GF4 On Board" I'm guessing that is a AGP adapter (whatever that
is). Also it said "On Board AGP 64 MB VIDEO 3D" I guess that means
64 MB of shared memory but the BIOS says 32 MB.

I already confirmed these guys ripped me off on the processor, but
they are switching that out for the correct one.

Sorry for the long winded questions, I would greatly appreciate any
help, especially let me know if you feel I got a little jipted on a
few things. If anymore info is needed, please let me know

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