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UPS problem with XPS9000
Hi. I need to know what UPS I need for my Studio XPS 435t/9000. I have a APC Back-UPS RS 1200, but whenever we have a power problem, the desktop reboots even though it is in battery backup. I confirmed through the APC Powershute that there is 20 minutes of battery life based on current power usage.
I re-checked and re-checked, it is plugged in to a batter backup plug.
So I assume my UPS isn't capable for supporting the power requirements for the Dell. What model UPS do I need for my system?
Thanks for the information.
gwforeman
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December 8th, 2010 22:00
You have to find a UPS that has Pure Sine Wave. I had to fine an APC Smart Ups 700 to make mine work. Just look for Pure Sine Wave as a specification.
fireberd
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December 9th, 2010 03:00
SOME, non pure sine wave UPS will work. I have a Dell branded (actually an APC model) and it works with my Active PFC Power Supply (what is in your PC). From other users reports if the UPS has a less than 4ms switching time these will work on some Active PFC Power Supplies.
Cyberpower makes several pure sine wave UPS systems. Check the availability on www.amazon.com
AndyMcDonald
44 Posts
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December 9th, 2010 06:00
Hi There. You are probably getting this problem because your current UPS has a square wave (or stepped approximation wave) output when on battery mode. Modern PFC power supplies don't like this and in general you should use a UPS with a sine wave output when on battery mode. Various options are available. The best is a 500W or 1000W Tower UPS from Dell (feature rich, good LCD control panel, 3 year warranty including batteries). There are also other alternatives out there - just check sinewave power output when on battery. Unfortunately it's going to cost a little more than the standby UPS technology you already have.
dsshaw
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December 9th, 2010 08:00
Great help, thank you all.