VGA is not a chipset it means the motherboard has VGA on board graphics.
Chipset comparison it rather easy to find, I'll find one now...
I lose, so much for my Binging skills. Oh well I can always fall back on the stickies.http://www.tomshardware.com/forum/257075-31-guide-choosing-parts
That guide talks about the differences between AMD chipsets very well I think.