The Wii U will be powered by a CPU with three IBM Power PC Cores, an AMD series 7 GPU and 1GB of memory available to games, development sources have told Eurogamer.
Though restricted by strict non-disclosure agreements, Wii U developers have anonymously divulged the console's final specifications.
The CPU is formed of three IBM Power PC cores of an undefined clock speed, though reports suggest this to be lower than the Xbox 360 and PS3.
1GB of RAM will be available to games in the final retail unit, which equates to approximately twice that offered to Xbox 360 games.
And the GPU is said to be a custom AMD 7 series, supporting shader type 4 and DX10 type features. The part also features embedded eDRAM.
One source told Eurogamer: "Wii U has a powerful GPU with more oomph than the rivals - and is more modern in architecture and shader support, which may come in handy later on.
"The CPU on the other hand is a different question. We are not limited by it but some other games might suffer from it. Still, because of the GPU, I expect most multi-platform games to look the best on Wii U, even if the difference might not be huge sometimes."
Further Wii U details are expected during a conference to be held by Nintendo of America on September 13.