How to flash gtx 980 for mac5/31/2023 ![]() unless you follow enjoy's excellent trick to force the eGPU accelerate the internal display with a headless display adapter. That means AMD XConnect and Nvidia Optimus for internal display acceleration is not possible in Windows. Therefore, the discrete graphics card Radeon Pro 555 is only one running all the time. I could not see it in either macOS or Windows (using goalque's guide). One bad news is that Apple firmware completely disabled the iGPU in this iMac. My priority is to get this iMac going in Windows 10. It came from the factory with 10.2.4 so Goalque's automate-eGPU script should work fine under macOS. I got the base 21.5" 4K which has the Radeon Pro 555 dGPU. The mid 2017 refreshed iMac with Thunderbolt 3 is perfect timing. ![]() I had wanted to get an iMac for an eGPU implementation in a while.
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