CPU And Memory
The second edition of Microsoft's first computer will have many of the same unique processor capabilities as its predecessor but at a faster clock rate. Surface 2 will be powered by an Nvidia Tegra 4 system-on-chip (SoC), which incorporates four ARM Cortex application processor cores plus a fifth "battery saver" core for performing functions during device standby. The Tegra 4 uses Cortex-A15 at speeds of up to 1.9GHz. Surface 2 is clocked at 1.7GHz compared with the 1.4GHz Cortex A9 cores in Tegra 3. Both Surface RT and Surface 2 include 2 GB of system RAM; the Tegra 4 can address 4 GB. Both are available in 32- and 64-GB models, of which Windows RT occupies about 16 GB. A microSD card slot supports the addition of as much as 64 GB for storage. There's also a full-size USB 3.0 port.