The iPad Mini is built around Apple's A5 custom SoC, the same processor found in the iPad 2. It has two ARM Cortex-A9 cores running at 1GHz plus a NEON SIMD instruction accelerator to boost application performance. The new Nexus 7 sports a quad-core Qualcomm Snapdragon S4 Pro application processor running at 1.5GHz. For graphics, Apple's SoC has a pair of PowerVR GPU cores, while the Nexus' Qualcomm includes a 400MHz Adreno 320. According to its maker, this new GPU is optimized for HTML5 and 3-D software and quadruples performance of its predecessor Adreno 225.
As for memory, the iPad Mini contains 512 MB of system RAM for running applications and is available with 16 GB, 32 GB or 64 GB for application and data storage. Nexus 7 comes with 2 GB of system RAM and is available with 16- or 32-GB storage. Neither the iPad Mini nor the Nexus 7 is expandable.