Re: how to increase to 512mbs the graphic card?
Your card only ships with 256MB of video memory. Likely they advertised this board having 'TurboCache' and in that way upto lets say 512MB but this is just marketing crap. TurboCache means that the videocard can use system memory as video memory when it runs out of video memory but system memory is very slow and it has a very long access time. The card uses this when it has to but it doesn't really help much.