System specs
2019 MBP 16" 16Gb RAM, 1TB SSD, 5500XT 4Gb dGPU
Latest Big Sur and latest Win 10
eGPU hardware
Razer Core X + Asrock Gaming Phantom 5600XT, TB3 cable for razer
Hardware pictures
Since my wife disabled my table in the favour for kids, my build is currently on the Christmas table lol, wife already complaining that it do not meet the Christmas table concept, so change incoming
Installation steps
OSX works plug an play
For windows, i installed Win10 via bootcamp manager in latest Big Sur. The iso i downloaded from MS x64.
After W installation, went into safe mode and DDU disabled all installed drivers according to manual.
Then installed the latest Dec RED drivers from bootcampdrivers
Thats it lol, eGPU working plug and play in W10 too...no need to speculate during login screen etc..just hot plug and its working...
I was very afraid with purchasing radeon card, since i read horror stories here how its incompatible etc....but very happy with the setup now... 
looks like they did change something to make it work...
I do use it on INTERNAL monitor...dont have external monitor
Benchmarks i do not have any benchmark programs
Comments the gaming is improved a lot for me....since this setup is very silent, no fans from MBP and some FAN noise from the eGPU.
I just want to know how to decrease the CPU temp little bit..currently while gaming the CPU sits on 60-70C range.
I have disabled turbo boost in w10
@guma, which guide did you use?
A) 2020 MacBook Pro, i7-1068NG7, 32GB RAM, 1TB, EGPU Razer Core X, Gigabyte OC 3080 10Gb, Samsung 49 1440p UltraWide C49RG
Mac OS Catalina 10.15.7, Internal Bootcamp Windows 10 latest update previously W10 2004 pci.sys swap.
B) 2.7 GHz I7 4 Cores, 16Gb, 1TB MBP 13 2018 TB3 , EGPU Razer Core X, Nitro+ RX5700 xt 8Gb, LG 32UK550
Mac OS Catalina 10.15.2, Ext SSD Windows 10 1903 V1 .295
C) 2.7 GHz I7 4 Cores, 16Gb, 1TB MBP 13 2018 TB3 , EGPU Gigabyte Gaming Box RX580 8Gb, Mac OS Catalina 10.15.2, Ext SSD Windows 10 1803
D) 3.1 GHz I7, 16Gb, 1TB MBP 13 2015 TB2 , EGPU Gigabyte Gaming Box RX580 8Gb
I did use the guide video on bootcampdrivers, how to install the drivers
@guma, ok so this is what you refer as manual, right?
A) 2020 MacBook Pro, i7-1068NG7, 32GB RAM, 1TB, EGPU Razer Core X, Gigabyte OC 3080 10Gb, Samsung 49 1440p UltraWide C49RG
Mac OS Catalina 10.15.7, Internal Bootcamp Windows 10 latest update previously W10 2004 pci.sys swap.
B) 2.7 GHz I7 4 Cores, 16Gb, 1TB MBP 13 2018 TB3 , EGPU Razer Core X, Nitro+ RX5700 xt 8Gb, LG 32UK550
Mac OS Catalina 10.15.2, Ext SSD Windows 10 1903 V1 .295
C) 2.7 GHz I7 4 Cores, 16Gb, 1TB MBP 13 2018 TB3 , EGPU Gigabyte Gaming Box RX580 8Gb, Mac OS Catalina 10.15.2, Ext SSD Windows 10 1803
D) 3.1 GHz I7, 16Gb, 1TB MBP 13 2015 TB2 , EGPU Gigabyte Gaming Box RX580 8Gb
Yes, i didnt do any sys modifications, efi loader, any special w10 version download or disabling updates etc...
it was realy so simple, i am surprised
@guma, you just make me feel really happy 😀
Waiting my Mantiz Saturn to arrive home at the end of the mounth... Whish everything work easy than you, I'm going to try with my RX590 so wish me luck!!
Macbook PRO 16" 2019 - 2,3 GHz i9 32GB - AMD Radeon Pro 5500M 8GB
Mantiz Saturn Pro 2 (Waiting Mantiz to send it) - AMD RX590 8GB
Macbook PRO Retina 2012 15" (Intel HD 4000 + Nvidia Geforce GT 650M)
Akitio Thunder 2 + Nvidia 970 GTX
Glad to help, have a good year with your new setup