PowerPC G4 had multiple generations, lowest one had like 350Mhz and highest one had 1.4Ghz, I think Apple completely switched to G4 by 2003 thus PowerPC750VX mass production was cancelled...
Stop guessing random things. The evolution of G4 goes in the opposite direction of this VX chip. They're not going to take some big step backwards in 2003. More likely story - this chip was being developed for some other market and someone got wind of it and assumed it was for Apple.
Then why IBM mentioned Power7... It is probably a misunderstanding from PR guy though why would Nintendo use older implementation of eDRAM and not the way Power7 has eDRAM implemented since logically looking a newer CPU should have better implementations... If there was no benefit of eDRAM being integrated/embedded into GPU then why they bothered at all?!
Here they outright confirm that it's NOT Power7 based at all.
http://hothardware.com/News/IBM-Confirms-WII-U-Utilizes-PowerBased-CPU-Not-Power-7/
Your rambling about "implementations of eDRAM" is more random stabbing in the dark. You need to just stop guessing things.
And no one ever said there's no benefit in embedding eDRAM into a GPU. I don't know how you could have possibly read that. I said that the latency benefits of having eDRAM embedded on the GPU chip instead of on a daughter die are mostly irrelevant to graphics. Of course there are other benefits that'd cause them to want to do it. More integration is cheaper (generally), more power efficient, and in some ways easier to design since you don't have to worry about external interconnects (XB360's eDRAM needs to be pushed over a more narrow higher speed bus than its internal interface). And it could be easier to get higher bandwidth. Again - I said the improved latency (which it would get but not that much of) doesn't help graphics very much. That's it.
If you all know so much then why don't you really contribute, why don't you put facts, evidence and hints about Wii U in one document, one page, one site?!... >_>
I've said plenty about what I know, you just don't listen.
The bigger point is, just because we can see that your poor logic and total guesses is wrong doesn't mean that we have all the answers. People don't know a lot because Nintendo doesn't want anyone to know a lot, even devs probably don't know that much about the implementation.
I Also just because I say it has something from Power7 does not mean it is Power7, it could have influence of that design, does Power7 higher density than PowerPC750CL if they were produced at same 45nm process?!
It doesn't have anything to do with Power7. Let it go. Stop using process similarity to try to ascertain something about design.