PFC on OCZ Powerstream 520w

No PFC on the older models unless sold in Europe, not sure about the new SLI units though.
 
That one's passive PFC - not a big deal in North America, but if you're looking for an active PFC Fortron unit, try the FSP460-60PFN or FSP550-60PLG (or FSP550PLG-SLI). Both of these will regulate better than the AX500-A.
 
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