System specs 

Screen size: Dell UltraSharp 34 Curved U3419W

CPU: 7th Generation Intel Core i7-7600U (Dual Core, 2.80Gz, 4MB cache)

iGPU: Intel HD Graphics 620

OS: W10

eGPU hardware 

eGPU: Razer Core X Chroma

Card: Zotac gaming Geforce RTX 3080 Trinity OC 10GB 320BIT GDDR6X

Installation steps 

Installation went pretty easy as is mentioned in other posts here. Simply plug in eGPU module into TB3 socket - Razer Synapse (Was installed before) instantly adds this device into system.

After that nvidia drivers must be installed manually.

System notification says eGPU might not work properly during this operation, but everything works fine.

Only problem is that network socket on Razer Core X Chroma stops working when i put a load on the video card.

Also there was a problem with laptop processor colling system - had to install cooling pad, which solved FPS drops.

Benchmarks (Include a  CUDA-Z  or  AIDA64  bandwidth pic. Optional: Valley, 3dmark, noting if it's on internal/external LCD )

CUDA-Z Report
=============
Version: 0.10.251 32 bit http://cuda-z.sf.net/
OS Version: Windows AMD64 6.2.9200
Driver Version: 457.30
Driver Dll Version: 11.10 (27.21.14.5730)
Runtime Dll Version: 6.50

Core Information
----------------
Name: GeForce RTX 3080
Compute Capability: 8.6
Clock Rate: 1725 MHz
PCI Location: 0:8:0
Multiprocessors: 68
Threads Per Multiproc.: 1536
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: 4096 MiB
Bus Width: 320 bits
Clock Rate: 9501 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: No
Async Engine: Yes, Unidirectional

Performance Information
-----------------------
Memory Copy
Host Pinned to Device: 2245.87 MiB/s
Host Pageable to Device: 2088.94 MiB/s
Device to Host Pinned: 2641.54 MiB/s
Device to Host Pageable: 2474.43 MiB/s
Device to Device: 184.075 GiB/s
GPU Core Performance
Single-precision Float: 32.6929 Tflop/s
Double-precision Float: 530.439 Gflop/s
64-bit Integer: 3925.95 Giop/s
32-bit Integer: 16.5513 Tiop/s
24-bit Integer: 16.6947 Tiop/s

Generated: Thu Nov 26 11:36:55 2020

Unigine Valley Benchmark 1.0

System

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Comments 

Gaming LoL - from low details to full

Workflow - eGPU is a must for big data operations, untill now i had to use cloud services (Example benchmark - wpa2 hashcracking goes from 3,5 hours (CPU)  to 14s (GPU)), also system runs more smoothly with such a big display.

Some says it is better to use external monitor plugged right in the eGPU so you dont send data back into laptop (More bandwidth left for GPU).

Dell hotline said it will never work...