Gabe at Hardware Secrets puts the Corsair HX620 under the microscope. His secondary analysis is particularly interesting as he tears up the unit to figure out the SMPS architecture employed.
This unit was reviewed by JonnyGURU when it first came out, HERE and won Jon's seal of approval. Have there been any revisions to the original design? Do Gabe's results match up with Jon's ATE results (especially with regards to DC output quality) and the results of various other reviewers? Find out for yourself at Hardware Secrets