i went to the screen card properties & saw that system video memory is set to 0
how could io change it? (on both of my pc's i have win vista but on one i have ATI & on another nVidia... both set to 0).
The reason why the system video memory is set to 0 is because the Graphics Cards you are using have their own dedicated memory. System Video Memory is for onboard Video which is considered to be an inferior graphics solution. Therefore your OS is reporting correctly and for the right reasons.