OCC has published a review on the Antec Truepower Quattro 1200W Power Supply

The DC voltage load regulation was pretty good but it fell short of its claimed 80 Plus Silver certification by a long way on 115Vac, the mains input voltage at which the certification applies and even at 230Vac, which always improves efficiency, it still fell a little short at 20% loading. Noise/ripple levels came a little close on the 5V0 rail and exceeded the limit on the -12V rail by quite a margin.

Antec Truepower Quattro 1200W Power Supply Review