iPad mini: Apple A5; 1 GHz
Google Nexus 7: Nvidia Tegra 3; 1.3 GHz
Amazon Kindle Fire HD: Texas Instruments OMAP; 1.2 GHz
Processing power is one area where the iPad mini doesn't come out on top.
Running Apple's A5 chip -- the same chip used in the iPad 2 and iPhone 4S -- the iPad mini can reach processing speeds of up to about 1GHz, falling short compared to the 1.3GHz that Google Nexus 7 can reach running on an Nvidia Tegra 3 processor and the 1.2GHz reached by the Amazon Kindle Fire using a Texas Instruments OMAP4460 processor.