Chipsets and memory speed...

[Mark Hahn]

> ALL current Intel motherboards have a single shared bus for all CPU access
> to main memory. PCI DMA to main memory may or may not collide with CPU to

according to the specs, at least, boards based on the profusion chipset
(aka corollary) have *two* shared buses - it's essentially two 4-way
nodes (cpus on FSB100 with dram) with a cache-coherent bridge.  it should 
be able to sustain the traditional ~400 MB/s on each side.  hellishly
expensive, though, and nowhere near competitive with ultra-cheap uniprocessor
duron nodes that push upwards of 600 MB/s.

regards, mark hahn.