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Wii U CPU

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December 3, 2012 12:38:47 AM

A notable Wii and PlayStation 3 hacker who goes by “Marcan” said that, after testing the hardware, he clocked the Wii U’s CPU at 1.2 GHz–or, to be even more precise, 1.243125 GHz. The CPU reportedly has three PowerPC 750 cores, and that it’s similar in design to Wii’s “Broadway” CPU.

Previously, several developers have gone on record that the Wii U’s CPU is slow, so slow, in fact, that developers are challenged with working around the CPU limitations when porting over existing titles to the new console.

Developers are still learning their way around the new hardware, and, while Marcan insists that the numbers aren’t necessarily as bad as they look, the alleged specs nonetheless presents a possible problem with developing for the Wii U moving forward.

The CPU may not be as good as some would have hoped, but the GPU stands up fairly well against the competition. Reports indicate that the GPU is as fast as PlayStation 3′s and only very slightly slower than the Xbox 360′s.
Read more at
http://www.inquisitr.com/418912/wii-u-cpu-and-gpu-specs...

so I'm going try speculate what possibly what really is under hood of wii u

CPU: 1.25GHz tri-core
3MB L3 Cache
OPTICAL DISK SPEED: 22.5GB/S
Memory: 2GB DDR3 1600
GPU core: 550MHz ChipR700 ATI:4870 Modified-Down Added Features
GPU Memory: 512MB-1GB Modified-Shared with Onbored Memory 256-bit GDDR5.

The lower clock speed doesnt matter because the instructions per clock is much higher on the CPU .

The Radeon HD 4870 1GB has core speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

(Compare those specs to the Radeon HD 5770, which features core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.
HD 5770 DX11-128bit The Card has Similar performance To HD4870)

Graphic Optimization Implementation
very efficient Version of HD4870 But Core clock Reduced to 550mhz to reduce power and heat but to generate same performance.

GPGPU:
Arithmetic intensity
–Math operations per word transferred
–Computation / bandwidth
Ideal apps to target GPGPU have:
–Large data sets
–High parallelism
–Minimal dependencies between data elements
–High arithmetic intensity
–Lots of work to do without CPU intervention
GPGPU stands for General-Purpose computation on Graphics Processing Units, also known as GPU Computing.
Graphics Processing Units (GPUs) are high-performance many-core processors capable of very high computation and data throughput.
Once specially designed for computer graphics and difficult to program, today’s GPUs are general-purpose parallel processors with support for accessible programming interfaces and industry-standard languages such as C.
Developers who port their applications to GPUs often achieve speedups of orders of magnitude vs. optimized CPU implementations.

The Wii U also has an ARM CPU for OS and a dedicated 16 bit/32 bit Macronix DSP for audio (64+ Voices but 32 bit instructions should give it 6 channel surround sound rather then 16 bit Pro Logic 2 on GC/Wii)
The Macronix DSP was Inherited from Gamecube/Wii cause of Backwards Compatibility. The other 2 HD twins wasted their Main CPU cycles on OS and sound cause lack of ARM or DSP Co-processors.

Bearing in mind the other consoles handle this onboard... Therefore ports are coded no doubt without even utilising the DSP singularly.

The CPU is great at branching but sucky at SIMD, and the GPU as its a DX10+ GPU, it can use Open CL
(DirectX 11 equivalent features and shaders)

IBM and Nintendo have revealed that the Espresso processor is a Power Architecture based microprocessor with three cores on a single chip to reduce power consumption and increase speed. The CPU and the graphics processor are placed on a singe substrate as a multi-chip module (MCM) to reduce complexity, increase the communication speed between the chips, further reduce power consumption and reduce cost and space required. The two chips were assembled to the complete MCM by Renesas in Japan.[1] Espresso itself is manufactured by IBM in its 300 mm plant in East Fishkill, NY, using 45 nm SOI-technology[2] and embedded DRAM (eDRAM) for caches.

Hackers, teardowns and unofficial informants have since revealed more information about the Espresso, such as its name[3], size[4][5] and speed.[6][7] The microarchitecture seems to be quite similar to its predecessors the Broadway and Gekko, i.e. PowerPC 750 based, but enhanced with larger and faster caches and multiprocessor support.


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December 3, 2012 12:53:43 AM

Hi there :hello: 

You may want to move this to the video gaming subsection if you don't get any replies. In a way this is related to the CPU but all the gaming enthusiasts are in that part of the forum and they may know. Might be worth the shot to post there.

Edit: Did you read this?
http://www.extremetech.com/gaming/142002-wii-u-cpu-and-...
December 3, 2012 1:07:05 AM

socialfox said:
Hi there :hello: 

You may want to move this to the video gaming subsection if you don't get any replies. In a way this is related to the CPU but all the gaming enthusiasts are in that part of the forum and they may know. Might be worth the shot to post there.

Edit: Did you read this?
http://www.extremetech.com/gaming/142002-wii-u-cpu-and-...

Yeah its a pretty good read and thanks for advice il repost there
December 3, 2012 1:12:54 AM

Ya its a custom ibm power pc cpu being it a tri core doesnt it mean its going to be fast
!