DIY eGPU Macbook experiences in Apple eGPU discussion Posted May 27, 2015 @Dschijn:I use Thermaltake Toughpower DPS G 750W and this riser.So far, there are no big problems but some small flaws.My EVGA GTX 970 FTW has coil whine issue.(a little bit)My Akitio circuit has high pitch noise.(a little bit)I am considering to connect a Molex cable directly to the barrel input and disconnect the power cable on the riser. @Tech Inferno Fan:Thanks for the information.And I still have a problem of booting from osx to windows. Sometimes, my internal screen is light on but black. And I have to reboot again and again until it goes into windows. I already installed the Optimus and my win8.1 pro is UEFI. Any advices?