2014 15" MBP Iris + GTX970@16Gbps-TB2 (AKiTiO Thunder2) + Win10 [ZapCord] in Implementation Guides - Apple Posted May 1, 2016 On 3/5/2016 at 1:57 PM, razvani said: Guys, I'm trying to make a 970 work with a 2013 15'' iris MBP and it's only working with an external screen. I'm getting a black screen every time I start with the eGPU connected. I tried several startup procedures. How do I get Optimus working? I'm using the newest nvidia 362 drivers on Win10 64bit. Sorry for being really, really late. Uni has been taking time... Just the other day, I accidentally broke Optimus and the eGPU only worked only on an external monitor. Confused about why it was doing so, I thought of an SMC and PRAM reset. Link to SMC reset: https://support.apple.com/en-us/HT201295 Link to PRAM reset: http://guides.macrumors.com/Zapping_The_PRAM Everything went back to normal after those were reset; Optimus worked again on Windows 10 for me. Maybe try those?