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APC 800VA UPS question

P

pOwErEd By NOS

Weaksauce
Joined
Apr 10, 2005
Messages
72
I'm thinking about getting an UPS. It needs to have fairly high output power because I will be using it with next computer (probably a 500 watt PSU). I can't decide between these 2. The only thing is I don't know if the cheaper one will have enough power output for my computer. But I don't want to have to pay double if I don't have to. Also what is "Boost and Trim Automatic Voltage Regulation (AVR)" Thats the only feature the more expensive one has that I think I care about.

http://www.apcc.com/resource/include/techspec_index.cfm?base_sku=BE725BB $82 at newegg

http://www.apcc.com/resource/include/techspec_index.cfm?base_sku=BR800 $160 at newegg
 
i have the 2nd one u link to and i like it it has save me on a blackouts that lasted 8 mins with the system in the sig. i run only the cpu on the battery and the rest is surge protected with the ups.
 
well for starters its not the PSUs total wattage you worry about
its the actual draw on the PSU and its efficency

then if it has PFC, as batteries dont like nonlinear loads
(of course most of the time those arent on the batteries but when they are that does impact the capacity)

http://hardforum.com/showthread.php?t=890652&
http://hardforum.com/showthread.php?t=892481&

AVR is power conditioning and is likely worth it if your not going to employ a far better and more expensive power conditioning scheme (like a brickwall) or an online UPS (full time inverter)


between actually measuring your current config and peripherals with a cheap wattage meter
using takamans http://takaman.jp/D/index.html?english to figure out
typical http://www.silentpcreview.com/article28-page4.html
and worse case draws http://hardforum.com/showthread.php?t=844691
you factor your new config and judge the PSU based on its PFC (no PFC deduct 1\4 the rated KVA) and efficiency
http://www.silentpcreview.com/section4.html
example > http://www.silentpcreview.com/article226-page3.html
65WattsDC 79% 82WattsAC
90WDC 82% 110WAC
150WDC 82% 183WAC
200WDC 83% 240WAC
250WDC 82% 305WAC
300WDC 79% 382WAC
430WDC 78% 553WAC


you can guess pretty good
or simply buy extra capacity
like buying a PSU, there are a number of variables you need to factor to get a lean and inexpensive solution
 
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