Retina display: 13.3-inch (diagonal) LED-backlit display with IPS technology; 2560-by-1600 resolution at 227 pixels per inch with support for millions of colors

Native resolution: 2560 by 1600 pixels (Retina); scaled resolutions: 1680 by 1050, 1440 by 900, and 1024 by 640 pixels

2.7GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.1GHz) with 3MB shared L3 cache

Configurable to 2.9GHz dual‑core Intel Core i5 (Turbo Boost up to 3.3GHz) with 3MB shared L3 cache or 3.1GHz dual‑core Intel Core i7 (Turbo Boost up to 3.4GHz) with 4MB shared L3 cache.

2.7GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.1GHz) with 3MB shared L3 cache

Configurable to 2.9GHz dual‑core Intel Core i5 (Turbo Boost up to 3.3GHz) with 3MB shared L3 cache or 3.1GHz dual‑core Intel Core i7 (Turbo Boost up to 3.4GHz) with 4MB shared L3 cache.

2.9GHz dual‑core Intel Core i5 processor (Turbo Boost up to 3.3GHz) with 3MB shared L3 cache

Configurable to 3.1GHz dual‑core Intel Core i7 (Turbo Boost up to 3.4GHz) with 4MB shared L3 cache.

8GB of 1866MHz LPDDR3 onboard memory

Configurable to 16GB.

128GB PCIe-based flash storage

256GB PCIe-based flash storage

512GB PCIe-based flash storage

Configurable to 1TB flash storage.

Height: 0.71 inch (1.8 cm)