> "in a computer, you would need at least four lanes for the other expansion slots"
The 348 and 341/342 can use PCIe and PCI-X concurrently, so you could use eight PCIe lanes for a graphics card, and a plain PCI-X bus for sound/USB/whatever else.
And I don't get the argument that eight lanes would "severely limit the graphics capabilities"... A) it'd be replacing a PCI bus on the iyonix, B) eight PCIe lanes is faster than AGP-8x, C) RiscOS isn't known for its large selection of 3D games which require every ounce of graphics power possible. I think a *much* bigger limiting factor would be the drivers....
All in all, I think the 342 looks like it could be a very nice desktop processor, even if it's not intended to be so. I wonder how much the IQ81342EX (ATX board with a 342 on it) will cost..... hmmmm....