MacBook Pro 15" Retina (Late 2013) Logic Boards had either dual graphics processors or a single integrated graphics processor. The heat sinks for these two models are not interchangeable. If you are replacing your logic board with one that has different graphics processors you may need to replace the heat sink as well. Not sure what logic board your laptop has? Use ID your Mac to identify your laptop.
- MacBook Pro 15" Retina A1398 Late 2013 to Mid 2014 Integrated Graphics