best ups for 850 watt psu

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R0nie

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Oct 21, 2013
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i have a Seasonic M12II Bronze EVO 850W psu and i need a good ups...i don't have that much knowledge about ups....so suggest me a good one..and what is the difference between sine wave ups and square wave ups and the difference between smart ups and back ups??and which one do i need??just suggest me the best one and please mention the reason why u r suggesting it.THANKS in Advance :D
 
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nebrethar
You'll want something that is rated at least 50 watts above the wattage of your PSU, in standard practice.

I would recommend something like

http://www.newegg.com/Product/Product.aspx?Item=N82E16842102048&cm_re=ups_900w-_-42-102-048-_-Product

or

http://www.newegg.com/Product/Product.aspx?Item=N82E16842111461&cm_re=ups_900w-_-42-111-461-_-Product

because they are good quality UPS units with reviews that praise their reliability.

As far as your questions go..

Square wave UPSes are normally less expensive, but produce a similar result. Often times you would use a sine-wave UPS because they need to make use of the more circuitry on sensitive equipment, or because it doesn't have the built in protection that a standard PSU already...
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nebrethar

nebrethar

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Nov 6, 2012
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You'll want something that is rated at least 50 watts above the wattage of your PSU, in standard practice.

I would recommend something like

http://www.newegg.com/Product/Product.aspx?Item=N82E16842102048&cm_re=ups_900w-_-42-102-048-_-Product

or

http://www.newegg.com/Product/Product.aspx?Item=N82E16842111461&cm_re=ups_900w-_-42-111-461-_-Product

because they are good quality UPS units with reviews that praise their reliability.

As far as your questions go..

Square wave UPSes are normally less expensive, but produce a similar result. Often times you would use a sine-wave UPS because they need to make use of the more circuitry on sensitive equipment, or because it doesn't have the built in protection that a standard PSU already has.

Smart UPSes are normally for very beefy loads, or server type situations. 99.99 percent of the time, it will not make a difference for consumer-size loads, such as a home pc.

Thanks and good luck choosing!

-Neb
 
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Titan
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May 18, 2007
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Nearly no modern UPSes are "square wave" since true square drive would kill the standard recovery input rectifiers in most SMPS. "Modified sine wave" UPS send alternating pulses shorter than a whole half-cycle to reduce the harmonic content and give SMPS input diodes time to recover. Running linear power supplies on those is generally not recommended since the higher harmonics will increase core losses. Some SMPS with Active PFC may also have trouble making sense of the high THD.

True sine wave UPS are mostly for situations where you cannot afford to second guess things or have unusually sensitive loads.
 
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