Is this accurate, graphic driver issue

C

CelebrityGamer

Notice in Dxdiag, its 1600+memory, that's using the latest drive 8.15.10.2869 .
https://s26.postimg.org/ugit0vpw9/Second2.jpg
And in the second photo, it says
https://s26.postimg.org/q8sm5vduh/se2.jpg

My questions, is video memory suppose to be 0 and system memory 0 as well? The reason I ask, when downgrading to a Vista driver, not only do I have more graphic memory, 1759 I believe, but it says I have 64mb video memory and I think 32 system memory. My question, should I download to vista drivers to get the best performance and accurate info and is there a way to increase video memory to 128MB, because I don't see it in the bios? or should I just download to a vista driver and just be happy with the increase graphic memory?
 
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