MacBook Pro 15" Retina (Late 2013 and Mid 2014) Logic Boards had either dual graphics (DG) processors or a single integrated graphics (IG) processor. The heat sinks for the IG vs. DG models are not interchangeable. Not sure what logic board your laptop has? Use ID your Mac to identify your laptop. Find the heat sink for the Dual Graphics models here.
- MacBook Pro 15" Retina A1398 Late 2013 to Mid 2014 Integrated Graphics