CPU:

“Espresso” CPU on the Wii U has three enhanced Broadway cores

GPU:

“GPU7” AMD Radeon™-based High Definition GPU. Unique API = GX2, which supports Shader Model 4.0 (DirectX 10.1 and OpenGL 3.3 equivalent functionality)

Memory:

Mem1 = 32MB Mem2 = 1GB (that applications can use)

Storage:

Internal 8 GB with support for SD Cards (SD Cards up to 2GB/ SDHC Cards up to 32GB) and External USB Connected Hard Drives

Networking:

802.11 b/g/n Wifi

Video Output:

Supports 1080p, 1080i, 720p, 480p and 480i

Video Cables Supported:

Compatible cables include HDMI, Wii D-Terminal, Wii Component Video, Wii RGB, Wii S-Video Stereo AV and Wii AV.

USB:

Four USB 2.0 Ports