A rumour of a rumour of a possibility of an inkling thought says that the specs to the Nintendo Revolution might be:

2 G5 1.8GHZ CPUS (NOT 2XCORE)
512K L2 Cache
1200 MHZ Front Side BUS – Xbox 360’s FSB is 1000 MHz
600MHz GPU with 12MB embedded 1T SRAM – 2x Pipes 4x T read?

128MB 1T SRAM MAIN MEMORY 600 MHz (L3 Cache to CPU and GPU)
256MB 400MHZ NEC design embedded DRAM
Embedded 16-BIT HD 7.1Digital sound chip
Dedicated sound bandwidth with zero affect on CPU

6GB HD Dual Layer Panasonic Discs

Take it for what it’s worth.

Link: Nintendo Centrum – More Rumored Revolution Specs