[X4U] Power Protection: UPS for a Dual G5

BSugarberg bsugarberg at core.com
Fri Jul 7 11:20:11 PDT 2006


Hello,

The rule-of-thumb conversion factor for converting VA to Watts = .6
(For example, I have a APC UPS, and it says on the box 500 VA/300 Watts).
Some UPS companies today use a higher conversion factor like .7, but
.6 is more accurate.

So, 1500 VA x.6 = 900 Watts.  If your system requires 7.5 Amps/900 Watts,
you will need a UPS larger than 1500 VA.  If it requires 9 Amps/1140 Watts,
you will need a much larger UPS.

Bruce
===========
Neil wrote:
> OK, everymac.com didn't have the power supply specs for my Mac, so I
> downloaded a PowerMac user guide from the internet.  It says 7.5amps or
> 9.5amps.   I think the 9.5 is for the original G5/2x2.  Mine is the 2004
> revision.  I think it uses the more efficient G5  CPU, so I'm guessing the
> power supply is only 7.5amps.  That still sounds like a lot though.  At
> 120volts, that would still be 900watts.  So, I can put my display and
> external drives on my Belkin 720VA, and get a bigger UPS for my PowerMac.
> Here are a couple I'm looking at.  Any suggestions?  Thanks.
> 
> APC
> <http://www.buy.com/prod/APC_BR_1500_Power_Supply_BACK_UPS_RS_1500VA_BR1500/
> q/loc/227/10346095.html>
> 
> Tripp Lite 
> <http://www.buy.com/prod/Tripp_Lite_SmartPro_1500_VA_Rackmount_Tower_Digital
> _UPS_1500VA_900W_3/q/loc/227/202149107.html>


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