Expandable memory via external USB hard drive and SDHC memory cards. Note the SDHC are only for Wii memory and Wii shop games.
CPU IBM Power®-based multi-core microprocessor
IBM has revealed it to be a 45nm chip, with embedded DRAM. Additionally, the CPU is based on the same chip that is used in the Watson supercomputer, implying it is a Power7 model.
GPU AMD Radeon-based High Definition GPU
RV740 GPU. The RV740
HD 4770,
ATI HD 4800 series GPU or HD 6700 series GPU. C
Supports DirectX 10.1
This chip is used in ACTi's Radeon HD 4800 series cards
AMD Radeon HD 6770 and supports DirectX 11
RAM
The Wii U has 2GB of RAM. 1GB of RAM is allocated to system functions.