The XFX Pro Series Core Edition power supplies performed very well across the range. The DC voltage load regulation was excellent from 20% to 100% DC loading and in combination with very low AC ripple/noise levels means excellent DC quality on all rails on all three power supplies. The 3V3 and 5V0 rails dipped a little lower than I would have liked but they still remained well within the limits set down by the ATX12V V2.2 specification and won't prove to be a problem when the biggest dip below ideal rail voltage was only 0.09V.