There are many models of Dell laptop. So this seems a typical question for their Sales department: "which of your laptops support VGA 640 x 480?").
Will Dell laptop supprt external display at VGA (640x480)?
I want to drive an old projector panel at VGA 640 x 480. Apple laptops will not go that low resolution anymore. Do Dell laptops still do that? At Windows 7? 8?