Yes it's from MisterXmedia, you can link the blog if you want
http://misterxmedia.livejournal.com/
or the tweeter profile:
https://twitter.com/misterxmedia
so you don't bu this rumor but you buy other rumors, this is ridicolous and the other are not, fine.
I prefer to wait the official info before call something ridicolous
since this moment I prefer to elaborate the rumors deeply as I can. Nor me, nor you know the truth, you can believe what you want and for me the same.
If the rumored CPU is a w2w 3d stacking cpu, then it uses 75% less power than a standard cpu, and produce 75% less heat, so you can easly uses the double amount of transistor and staying under the 300W mark.
What's the reason that make you believe that this can't be possibile?
I don't buy that rumor because it makes no sense at all. I'm sure two HD8000s would LOVE to share data with each other over DDR3. I also love how each CPU has 128MB of eDRAM (what would be the size of that again?) along with a HD8000 GPU and 1.5GB of GDDR5 all fitting nice and snug in a small package, and and there are two of them!
But wait, there's more act now and you get a kitchen sink in the form of a VTE...that will do real time raytracing! All this coupled with an additional 5GB of DDR3 can be yours for the low low price of? Magical raytracing chips, 2x HD8000 GPUs, and 256MB of eDRAM. Yea...totally realistic. :|
Not to mention thermal and power limits. The magical raytracing chip alone slays me.