The iPad (4th Generation, 2012), officially marketed as the "iPad with Retina display," was a powerful, mid-cycle refresh to the third-generation model. While maintaining the same physical design and 9.7-inch Retina display (which boasts a sharp $2048 \times 1536$ resolution), the 4th Gen featured crucial hardware upgrades that significantly boosted its performance and modern connectivity.
The key improvement was the adoption of the Apple A6X chip with a dual-core 1.4 GHz CPU and quad-core graphics, doubling the performance of its predecessor (the A5X). This made graphics-intensive tasks and general system responsiveness much faster.
Another defining change was the replacement of the large 30-pin connector with the small, all-digital Lightning connector, standardizing it across Apple's mobile lineup at the time. This configuration, with 16GB of storage, is the base model and is available with either a Black or White front bezel.
Model: iPad (4th Generation, 2012)
Processor: Apple A6X chip (Dual-core 1.4 GHz CPU with Quad-core Graphics)
Storage: 16GB Internal Flash Storage
Display: 9.7-inch (diagonal) LED-backlit Multi-Touch Retina display
Resolution: $2048 \times 1536$ pixels (264 ppi)
Port: Lightning Connector (replaces the older 30-pin connector)
RAM: 1GB LPDDR2 RAM
Camera (Rear): 5-megapixel iSight camera with 1080p HD video recording
Camera (Front): 1.2MP FaceTime HD camera with 720p video
Wireless: Wi-Fi (802.11a/b/g/n, dual-band 2.4GHz and 5GHz) and Bluetooth 4.0
Battery Life: Up to 10 hours of web surfing on Wi-Fi
Weight: 1.44 pounds (652 g) for Wi-Fi model