Some new information has surfaced due to some in-depth research conducted by various engineers regarding the Wii U's handling of memory: it may be more powerful and faster than we thought.
Unlike the PS4 and the Xbox One, the Wii U is the only new generation console that has a lot of secrecy surrounding its hardware capabilities. While early kits and impressions from developers indicated that the Wii U was weak and slow and a crap system, further digging from die-hard members of the gaming community have summed up a possible cap for Nintendo's eighth gen system capabilities.
Some individuals have pointed to the fact that Renesas Electronics, who merged with NEC the semiconductor company who was recently picked up by Sony, as reported by DualShockers is responsible for the Wii U's semiconductor in the same way that they were responsible for the Xbox 360's semiconductor. The natural logic that follows is that newer tech made in 2012 would obviously be faster than whatever they produced in 2004 for the Xbox 360's release in 2005.
Keep in mind that the Xbox 360's bit bus per macro was 1024 nearly a decade ago, and according to information provided by Bob Peterson regarding NEC Electronic's eDRAM for the 360 the system was capable of expanding its bandwidth thanks to the external buffering from the eDRAM, writing in a Silicon Valley piece...
Using external memory, the GPU would be limited to a 32- or 64-bit interface. The NEC Electronics eDRAM expands the on-chip memory interface past 1000 bits in width to support the GPUs 256-Gbytes/second bandwidth between the graphics pipelines and memory.