There are two versions of this series one with just the iGPU (Intel chip graphics engine) and the other with a AMD GPU chip. Do you know which you have? Here's a listing of this series:
If you take the bottom cover off you can see the difference in the heat sink as it will either only have one chip pad or two. Follow this guide to get it off [https://www.ifixit.com/Guide/MacBook+Pro+15-Inch+Retina+Display+Mid+2015+Lower+Case+Replacement/55914]
There are two versions of this series one with just the iGPU (Intel chip graphics engine) and the other with a AMD GPU chip. Do you know which you have? Here's a listing of this series:
* [https://everymac.com/ultimate-mac-lookup/?search_keywords=MacBookPro11,4|MacBookPro11 (iGPU)]
* [https://everymac.com/ultimate-mac-lookup/?search_keywords=MacBookPro11,5|MacBookPro11,5 (dGPU)]
If you take the bottom cover off you can see the difference in the heat sink as it will either only have one chip pad or two.