Hm. I heard the thing houses a real monster. Apple's dropping Intel... and all existing Intel-based macs are going to explode, killing their owners.
Okay, I'll be honest. I didn't just hear it, I've seen firsthand the new Macs... they're pretty sweet. Apple has dropped OS X in favor of a revamped OS 9; it's Mac OS 9.5, with a NeXT-like facelift, and running 64 (single-core, of course) PowerPC 604ev+ ("Mach 5.5") CPUs running on a 32nm process at 2.25 GHz apiece on a 450 MHz bus.
They achieved the much higher clocks (in addition to the obvious die shrink) by deepening the pipeline to 13 stages (hence the "+" and ".5" added), added an extra FPU, and integrated what they are now calling "UniVec," a 64-bit vector processor on-chip, capable of rendering two 32-bit vector operations per clock. It's the first step towards their vision of a superscalar vector unit, which they say will eventually be better than AltiVec was. They also increased L1 cache to 64K/96K instruction/data and sped up the MoBo L2 while dropping latency and increased it to 8MB per chip.
The greatest part? High-density 6ns, interleaved 2.5v EDO-DIMMs. 48 memory slots for up to 48 GB RAM. In order to get them to fit, they had to make a sort of three-dimensional array of RAM slots at different heights and angles, so that, when fully populated, the DIMM area makes a sort of 3D maze in the shape of a cubic rectangle.
They're using PCI-E, though, in favor of the superclocked PCI they were expecting to be using- they found that the old interface still didn't give enough bandwidth even clocked at 533 MHzx1 (that's the breaks with SDR-interfaces).
It also has 8 PCI-E slots, and a 2.5kW PSU; you can do 4-way Scanline-Interleaving with up to 300W per rail (they opted to go for an ATX-powered deal so they could have 4xGeForce 9800x2s.
They've also found a way to run their drives at 30,000 RPM with multiple platters, and so are opting for lower areal density but (obviously) much higher rotational speeds, and hence, rotational latencies. They aren't sure how well these new closely-fitted eight-platter 392 GB drives will sell, given they cost $800 apiece. But they're hopeful.
Pretty cool huh? =-)
I really, really have too much time on my hands....