When I bought my Dell Inspiron, the video card which was promised to me was 256MB nVidia GeForce Go 7300 TurboCache. Then later I had a problem with the Video Card and they replaced it. But now, if I look into the Video Card Memory in BIOS and in Windows Device Properties, it says Dedicated Memory as 128MB. No where there is written that it shares with the memory and moreover if the Video Card shares memory with RAM, then available RAM should not be shown as 2 GB. There is sure some confusion here, can anyone tell me whether that 256MB in the card would be dedicated or shared? If shared, how do I find it out it is shared or not?

Thanks