It is complicated to remember which Mac model was purchased, what was the processor, what was the installed RAM on my Mac machine? It is possible to upgrade RAM? Is it possible to upgrade SSD? These all are basic information that can be retrieved from the Mac machine.
Mac Version, Processor, RAM, Graphics Card, Serial Number
By clicking on the Storage tab, you can get detailed storage information.
As you can see in the image, my Mac OS X runs on Intel HD Graphics 6000 and it has VRM 1536 MB.
All detailed information about the hardware installed on your Mac can be retrieved from System Report. You can even get the information about Network and Software in detail from here. Just click on the respective menu and get the desired results.