i'm using nvidia 7300le 256 pci. in windows xp my vga detected as 256mb video card but now it is detected as 128mb vga with 64mb vram. i searched the web and some body told me to update driver. i used win vista update driver but no thing changed. i need to restore my vga to 256mb to install some of graphical softwares and games. please help me to solve this problem and have a 256 vga on win7. why xp detects 256 and (7 and vista) detects 128?