There are several parameters to assess the performance of the laptop. The CPU processor and the Graphic cards are of the most important factors. I had just found a useful resource of how to compare the laptop graphic cards.
It has several catalogs, High-end graphics cards, Mid-Range Graphics Cards, Low-Midrange Graphics Cards, Low-End Graphics Cards, Office-Class Graphics Cards, Not Suited for Games, and unknown.
For every catalog, there are many types of models of graphics cards, like NVIDIA GeForce GTX 680M SLI. The article described it from several aspects, architecture, performance, features, and some benchmarks.
Find more graphics comparison knowledge about graphics cards from here.
Wish your can always find the laptop with graphics cards that is suitable for you. You can select from the famous NVIDIA or AMD graphics Cards.