Is it possible to tell whether a Dell laptop, such as the Inspiron 6400, has a discrete graphics card with just the service tag number? I couldn't identify such information on the Dell system information page listings. Is such information available on the Dell website?
It is, in the Original Configuration listings - there are four possibilities:
Intel integrated (no separate video card listed)
ATI X1300 or X1400
There were no other video options (nor are any others useable) in the 6400 system.