Both the 20" and 24" iMac’s are powered by the NVIDIA® GeForce® 9400M 24" iMac offers two performance upgrades with either the GeForce GT 120 or the GeForce GT 130 with 512MB of dedicated video memory.

This iMac reaches new levels of detail and realism graphics, high-resolution photos, high-definition video and games.

Each iMac with GeForce graphics support external DisplayPort so driving a second 30-inch Cinema display is easy.