Some Dell laptops have been using dual monitor Intel graphics for some time.
Intel Q965/q963 Express.
It is an on-board graphics controller.
But there is not easy way to know how much memory is installed.
Edit: Sorry, I now see what the OP means.
I tried
Everest Home and it had to go to the internet to find the data. The chip can support up to 8 GB, but dell only installed 256 MB.
So, when buying a laptop with dual monitor graphics, you will have to do more research to find out what it has. Everest appears to need internet to get the specs.
... Just wanting to help.