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850W PSU, what wattage UPS?

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  • Power Supplies
  • Components
Last response: in Components
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August 22, 2013 12:35:14 AM

Hey all, i'm looking into getting a UPS, unfortunately i know nothing about them; however, I assume that for an 850W PSU I would want ,at least, and 850W UPS, correct?

Or would that only be true if the PSU was drawing at full?

More about : 850w psu wattage ups

a c 1212 ) Power supply
August 22, 2013 1:40:58 PM

What is the brand and model of your 850 Watt power supply unit?

Some PSUs aren't compatible with UPS' that output a simulated sine wave when operating on battery power.

If you want to avoid possible compatibility issues you should consider this one:

http://www.cyberpowersystems.com/products/ups-systems/a...
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August 22, 2013 2:34:46 PM

ko888 said:
What is the brand and model of your 850 Watt power supply unit?

Some PSUs aren't compatible with UPS' that output a simulated sine wave when operating on battery power.

If you want to avoid possible compatibility issues you should consider this one:

http://www.cyberpowersystems.com/products/ups-systems/a...


It's a Corsair AX850
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a c 1212 ) Power supply
August 22, 2013 2:50:35 PM

boyyoyo said:
It's a Corsair AX850


During X-bit lab's review of the AX850 they tested UPS compatibility with an APC SmartUPS SC 620 that outputs a simulated sinewave (i.e. stepped approximation to a sinewave) when operating on battery power. What they found was that the UPS would not switch over to battery operating mode even at a power draw of 280 Watts during a power grid interruption event.
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August 22, 2013 2:59:32 PM

ko888 said:
boyyoyo said:
It's a Corsair AX850


During X-bit lab's review of the AX850 they tested UPS compatibility with an APC SmartUPS SC 620 that outputs a simulated sinewave (i.e. stepped approximation to a sinewave) when operating on battery power. What they found was that the UPS would not switch over to battery operating mode even at a power draw of 280 Watts during a power grid interruption event.


So would that apply to ALL simulated signwaves? If so, I WOULD need a UPS that output a REAL sign wave for the battery to kick in?

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a c 1212 ) Power supply
August 22, 2013 3:23:14 PM

boyyoyo said:
So would that apply to ALL simulated signwaves? If so, I WOULD need a UPS that output a REAL sign wave for the battery to kick in?



There isn't much, if any, PSU/UPS compatibility data available to even determine that. If you contact the PSU manufacturer they will usually tell you to test the PSU & UPS combination yourself to determine whether or not it's compatible. That's difficult to do if you don't have the simulated sinewave UPS to test with.

The incompatibility is usually a result of the circuit design implemented in the Active PFC circuit of the PSU and how it interacts with the UPS.

A pure sinewave UPS eliminates the possibility of incompatibility.
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