[CentOS] 12V computing?

[jim]

12VDC is appropriate for places that don't have 
other electrical supplies. these places include 
automobiles and boats as well as remote regions 
that use windmills, creekmills, solar panels, 
car batteries, and deep discharge gel batteries, 
possibly in a mix. typically there's noise and 
variant voltage levels above the nominal 12VDC; 
any system should be designed to work with spikes, 
noise, and higher voltages--most are as a matter 
of course. 



On Fri, 2008-04-11 at 19:06 -0400, Gordon McLellan wrote:
> If you want to minimize power costs, look to higher voltage, not
> lower.   Run your computers off 208-240 volts instead of 100-120.  If
> your supply is not auto ranging, make sure it's set to the high / 230
> setting.
> 
> Having a massive 12v power supply to run several computers isn't going
> to save any power.  Your second picture just demonstrates they have
> integrated the electronic power supply into the board, thus when your
> power supply fails, you can replace the entire system instead of just
> a component. It is doubtable than a 12VDC to ATX converter is any more
> efficient than an AC-line to ATX converter.  Plus the cabling to
> transfer 12V at 10a+ more than a few feet is going to be massively
> expensive - look up the I2R losses on google.
> 
> In regards to cpu support, the via website mentions the C7 compares
> directly with the Pentium IV, which would make it a 686 class cpu.
> Additionally, they claim support for these extended instruction sets:
> MMX, SSE, SSE2 & SSE3
> 
> One thing you might want to consider, is DIY blade computing.  With
> some clever wiring, you can splice the ATX connector harnesses from
> several dead power supplies onto a modern high wattage psu, providing
> power for 4 to 6 low-end system boards arranged in a stack.  A new "80
> PLUS" rated 500-600w psu should have no problems.  Pick one from the
> stack to be the 'master', and toss a hard drive on it, the rest can
> net boot from it.
> 
> Gordon
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