[Beowulf] DC Powered Chassis

Nathan Littlepage nathan at iwantka.com
Sun Feb 8 17:31:40 EST 2004


Thanks!

Alvin Oga wrote:

>hi ya nathan
>
>On Sun, 8 Feb 2004, Nathan Littlepage wrote:
>
>  
>
>>With all the power talk on the 'HVAC and Room Cooling' subject. I've 
>>been looking for 1 or 2u chassis that support -48v DC as the main power 
>>source. Does anyone know of someone that manufactures these?
>>    
>>
>
>some collection of "these"
>
>http://www.Linux-1U.net/PowerSupp/DC
>http://www.Linux-1U.net/PowerSupp/12v
>
>
>problem with +12v or -48v dc inputs is you need to provide
>enough current to these "dc power supply"
>	- at 12v .. we were calculating about 400A ...
>	since we estimate 4A per mb and 100 mb per rack
>	and double it or 50% for keeping the powersupply
>	reasonably within its normal lifespan ( mtbf )
>
>fun stuff...
>alvin
>
>
>  
>


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