2018 15" MacBook Pro (RP560X) [8th,6C,H] + RX Vega 64 @ 32Gbps-TB3 (Mantiz Venus) + macOS 10.14 & Win10 [mac_editor]
@mac_editor That would be a nice change if the new firmware in Catalina indeed allows iGPU/dGPU to stay activated in Boot Camp with eGPU connected. I will test on 2018 Mac mini and 2019 13" MacBook Pro soon. Can you share the Boot ROM version for reference?
Bootrom: 1037.0.60.0.0 (iBridge: 17.16.10541.5.2,0)
The change probably only affects dGPU-based 15" MBPs after 2016, or maybe only T2 15" MBPs. But would be good to test.
Also, for Mantiz 25.1 firmware, AIDA shows Mem. Read as 2600+ MB/s (no write in trial) - with H2D I was expecting reduced bandwidth, as on macOS both D2H and H2D are 14xx. Still haven't updated yet.
quick question! when you used the bootcampdrivers.com drivers, did you get the Radeon Pro panel? or the regular Radeon panel? I have the same setup in my MZ-02 but for some reason I keep getting the Radeon Pro panel which doesn't support Wattman, and therefore no undervolting...
I get the regular Radeon panel. I recall some older releases caused the Pro panel to show up, but ideally using one of the newer releases should bring up the regular one.
Thanks! I was using the July V2 version, but perhaps using the August release I will be able to get the regular panel then.
Interesting. I recall not having issues with the July V2 version. Perhaps you should start clean with DDU and retry with August drivers.
Impressions section added.
I am noticing now that booting with the eGPU plugged in does not disable the internal monitor - or is this just me? For reference, I'm running Windows 1903 and the latest developer beta of Catalina. I do have some USB drives connected to the Mantiz, if that makes any difference. So far, has been consistent across multiple boots. If this is indeed the case, Apple has updated 2018 MBP 15" firmware and made eGPU on bootcamp easier.
I checked with 2018 Mac mini and 2018 13" MacBook Pro just now, booting up with eGPU connected and without any workarounds. Unfortunately the iGPU was deactivated in both Macs. They are running latest Catalina Beta as well as Win10 1903.
Seems to be as expected. It is probably reasonable to guesstimate that within the firmware (for both 13" and 15" Macs), the integrated GPU is disabled in presence of another GPU (not just discrete GPUs). Changes to this implementation would imply that my Mac should have booted into Windows with iGPU activated as well. All of this would change if Apple starts distinguishing between discrete and external GPUs for this implementation, but for now, there seems to be no significant incentive as there is no way to adjust GPU mux on Windows dynamically.
What's been improved here is that I no longer need to do the uninstall GPU before shutdown procedure in Windows to keep internal display active.
I have a 2018 15` i9 MBP and a 2080ti + Razer Core X. I recently reinstalled Bootcamp, and I had to do no extra steps for it to work with eGPU. Simply turning it on with the eGPU connected allows it to detect. The MBP screen stays frozen on the Windows loading, but when hot unplug the eGPU it comes to life. Does that mean the iGPU is not disabled or does it mean it gets enabled on the eGPU unplugging?