Another boo-boo from Apple?

Regularly, Apple is updating its tech notes normally reserved to computer technicians. Apple Insiders has discovered in one of the most recent G5-dedicated tech notes, info which could one more time reveal some features of the upcoming G5 revision before it is officially announced.
On the right you can see the first G5 version, whereas on the left is the new version [No more now for we had to suppress the pictures — (s.) Kalomir].
You can easily identify differences which are not found in any of the current G5 models. The new motherboard is shorter, almost a square shape, but the most striking one is the size of the processor/heatsink block!!
What could be underneath, what processor type is below??
It is absolutely possible that his "new G" is in fact the one which was planned to be released few month ago if IBM was not facing problem to produce the PPC970fx. But then, why having such a huge heatsink block, PPC970fx are 90nm engraved, so they should heat less?
So 2 solutions:
- On Appleinsiders web site there is a scale 1 size photo where it is possible to see that the "new G5" do not have the fan in front of the processor/heatsink block; so it might be that the block is now including fans to improve the cooling of the processor(s) and reduce the noise; or Apple is using such a huge heatsink that processor-dedicated fans are not necessary anymore (but unlikely).
- the other hypothesis is a bit more audacious... instead of PPC970fx, processors could actually be PPC975. Why not? IBM has already announced those Power5-derived processors last year?
Nevertheless, this "new G5" definitely looks like a new model, but it is also not so much surprising since it is about time to release an update for the PMG5, knowing that there are very small stocks of any models (except 1.6GHz), and that due to an expected revision, PMG5 sells are low.