2019 16" MacBook Pro (RP5300M) [9th,6C,H] + RTX 2070 @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10  

After finally receiving a new card in the mail after the old one was broken, everything went relatively smooth with this build. 

System specs

2016 16" Macbook Pro 

i7-9750H

Radeon pro 5300M (4GB)

eGPU hardware 

Sonnet eGFX Breakaway Box 550

Gigabyte GeForce RTX™ 2070 GAMING OC 8G

Anker 0.5m Thunderbolt 3 Cable

HP Z32 Monitor via DP 

Hardware pictures

Coming Soon 

Installation steps (what did you do to get it all going?)

- Install latest Windows Insider Build (Fast) Win10 Version 2004 Build 19628.1

- Uninstall AMD dGPU Drivers using DDU

- Hot Plug eGPU after Windows is fully booted

- Let windows auto install the drivers (Windows actually installed the newest one in my case)

I always unplug the eGPU after shutting the system down and then hot plug it again after windows is fully booted and i'm logged in.

Benchmarks 

CUDA-Z Report
=============
Version: 0.10.251 64 bit http://cuda-z.sf.net/
OS Version: Windows x86 6.2.9200
Driver Version: 445.87
Driver Dll Version: 11.0 (26.21.14.4587)
Runtime Dll Version: 6.50

Core Information
----------------
Name: GeForce RTX 2070
Compute Capability: 7.5
Clock Rate: 1620 MHz
PCI Location: 0:129:0
Multiprocessors: 36
Threads Per Multiproc.: 1024
Warp Size: 32
Regs Per Block: 65536
Threads Per Block: 1024
Threads Dimensions: 1024 x 1024 x 64
Grid Dimensions: 2147483647 x 65535 x 65535
Watchdog Enabled: Yes
Integrated GPU: No
Concurrent Kernels: Yes
Compute Mode: Default
Stream Priorities: Yes

Memory Information
------------------
Total Global: 8192 MiB
Bus Width: 256 bits
Clock Rate: 7001 MHz
Error Correction: No
L2 Cache Size: 48 KiB
Shared Per Block: 48 KiB
Pitch: 2048 MiB
Total Constant: 64 KiB
Texture Alignment: 512 B
Texture 1D Size: 131072
Texture 2D Size: 131072 x 65536
Texture 3D Size: 16384 x 16384 x 16384
GPU Overlap: Yes
Map Host Memory: Yes
Unified Addressing: Yes
Async Engine: No

Performance Information
-----------------------
Memory Copy
Host Pinned to Device: 2182.18 MiB/s
Host Pageable to Device: 1800.06 MiB/s
Device to Host Pinned: 2627.06 MiB/s
Device to Host Pageable: 2187.39 MiB/s
Device to Device: 164.876 GiB/s
GPU Core Performance
Single-precision Float: 8397.76 Gflop/s
Double-precision Float: 267.149 Gflop/s
64-bit Integer: 1935.27 Giop/s
32-bit Integer: 8181.68 Giop/s
24-bit Integer: 8182.01 Giop/s

Generated: Wed May 20 17:17:44 2020

Comments 

Interestingly enough I had to completely remove the driver for the dGPU in order for it to work reliably. With the apple boot camp drivers as well as the bootcampdrivers.com drivers, the MacBook crashed around 4/5 times when hot plugging the eGPU.

The Performance is generally pretty good even though I expected a little more. I often see the GPU usage idling at around 5% in Games like Warzone. Warzone does not run well. I have to be on 1080p with medium/low graphics to see a smooth 70+fps. Modern Warfare on the other hand can be played at 1440 with Ray Tracing and everything maxed at a solid 60fps. Seems like it a mix of bad optimization and cpu intensive gameplay for warzone. 

It seems that because the dGPU drivers are uninstalled, the Windows is basically unusable without the eGPU. The internal display is laggy and it seems as tho the CPU is trying to compensate. The Epic Launcher managed to use around 90% of my CPU while not downloading anything. This only improved upon closing the program.