Tell_me :
But,
The model I can get has 1gb ddr3 VRam only.
"it takes from ram"
Sorry, but i don't understand it
Regards,
Tell_me
Most lower end cards, chipsets share memory from RAM
That 1GB must be dedicated video memory
Max amount will be 2GB getting another 1GB from RAM.
If u could provide links to the laptops it would be better
Anyways 640m is better in performance and u are getting an ssd with it