The Cooler Master Silent Pro Gold 1200W power supply produced a mixed bag of results during testing. The DC voltage load regulation was excellent and on a par with other power supplies in this class, but it did produce a disappointing set of results for AC noise/ripple. I always measure the AC noise/ripple levels at or near full DC load, which will always produce worst case results, but this is the recommended method as per the ATX12V V2.2 specification and the Cooler Master Silent Pro Gold 1200W doesn't perform too well.