These cards offer the best 3D performance in a laptop. They can
handle all the latest games at high resolutions and high detail
settings. The power consumption of these GPUs is very high,
therefore, only big laptops with bad battery life usually offer
these cards.

These cards should be able to handle all current games with fluent
framerates but not all with high detail settings. Especially
demanding games may only run in low-medium detail settings. However,
you can get some cards in smaller form factor laptops with good
battery life.