Hardware Asylum reviewed the Noctua NH-U12S Redux Heatsink
A quote from the article:
In this review we are looking at the Noctua NH-U12S Redux. The Redux is a streamlined and accessibly priced version of the popular NH-U12S which had become a very popular due to its overall performance and form factor. As the name suggests, the Redux line is designed to be a more affordable version that can still deliver good performance under certain conditions.Noctua NH-U12S Redux Heatsink Review