hello i have a geforce6150se nforce430 chipset and it has normally 256mb of grahics,but when i put more than 1gb ram it says 512mb of graphics,thats only on xp,not vista,and the same thing hapens on my other pc with a geforce7050pv chipset i wonder why is that,is it using from ram as a video memory?
Yes older graphics cards steal some ram. Nvidia calls it turbo cache.
The reason you have to have 1 gb of ram for turbo cache to be enabled is because with less than 1 gb of ram, there wouldnt be much ram left to use.
BTW... i think turbo cache is not enabled when just browsing the web ect... just when playing games.