Question about how much Vram to assign

How much Vram should I use, I have 8 gigs of ram and windows 7 ultimate 64.

Your question is not very clear. Do you mean you have an integrated graphic processor (for example Intel HD3000) and you want to know how much shared memory this should take? If yes, then 1 GB at most will be more than enough since you won’t be doing GPU rendering with it due to low performance.