Судя по всему, для APFC нужен clear sine wave:
http://www.newegg.com/Product/Produc...82E16842102132
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CyberPower’s Adaptive Sinewave UPS with pure sinewave output is the first to address the critical compatibility issues of non-Sinewave UPS products working with computing systems using Active PFC power supplies
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http://forum.corsair.com/v3/showthread.php?p=395203
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If you have a PSU with active PFC you MUST use an UPS with a clear sine output!
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