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A5 is a dual-core version of the 1GHz A4 chip that powers the iPhone 4 and the original iPad. The iPad 2 also has 512MB of RAM--twice that of the original iPad--and a 200MHz bus speed,

the key about "up to double" is that software must be optimized to take advantage of multiple processor cores

Graphics performance has become a major component in determining how fast a computing device feels. And Apple says that the graphics performance on the iPad 2 is as much as nine times faster

the moment I started using the iPad 2 with familiar apps from my original iPad, I could tell that the system was faster.

Then there's the question of whether you need to buy an iPad 2 with 3G at all. Many smartphones--including the iPhone 4--have a Wi-Fi-based hotspot feature that lets them share their Internet connections with other devices.

if you dream of using your iPad as a jumbo GPS navigation console, you'll absolutely need a 3G model.

support for HDTVs and HD video. A combination of iPad 2 hardware upgrades, a new adapter from Apple, and updates to the iOS share the credit, but the end result is great news for both entertainment and education.

A feature exclusive to the iPad 2 that will be hailed by educators, presenters, and anyone else who has ever wanted to show off their iPad's screen to a large crowd: video mirroring. When connected to the HDMI adapter, the iPad 2 will display a duplicate version of the contents of its screen on an external monitor. Want to demo an education app via a projector or HDTV for a classroom full of kids? The iPad 2 makes it possible.

iPad app ecosystem launched strong and has continued to grow, making it one of the iPad's biggest advantages over competing tablets.

GarageBand for iPad is an almost breathtaking achievement. At times it feels more responsive than GarageBand running on the late-model iMac on my desk at work