power-efficiency & non-x86 desktop systems
I have recently heard that ARM CPU's tend to be more power efficient
than x86 CPU's.
I know that several free operating systems, Debian GNU/Linux included,
support some non-x86 architectures, such as ARM and MIPS.
So, this brought 2 questions to mind:
Which processor architecture, or specifically, which CPU lines are
specifically designed to be power-efficient?
Are there any non-x86 motherboards with PCI, SATA, USB, etc. that
would be powerful enough for moderate desktop use, i.e. web surfing,
compiling software packages, and playing movies?