Q: What do the eGPU port acronyms like 32Gbps-TB3 mean and what are their ranked & measured peak H2D/write bandwidths?

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2023 13" Dell XPS 13 9315 [12th,10C,U] + RX 6800 @ 32Gbps-TB4 (Razer Core X Chroma) + Win11  

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John
 John
(@john_4)
New Member
Joined: 2 years ago
 

System specs (model inc screen size, CPU, iGPU, dGPU, operating system which eGPU is being used)

  • Windows 11
    • 2023 Dell XPS 13 9315
    • 13" 1920 x 1200 laptop display
    • i7-1250U 10 Cores (8 efficiency, 2 performance) Max TDP 29W
    • 16GB LPDDR5, 5200 MHz
    • Intel Iris Xe
    • Window 11 
  • macOS 13 (Mainly just as a 1 cable solution)
    • 2020 13" MacBook Pro [10th,4C,G] TB3 system
  • External Display
    • Cooler Master GM34-CWQ 3440 x 1440

 

eGPU hardware (eGPU enclosure, video card, any third-party TB3 cable, any custom mods)

 

Hardware pictures (note: require 5+ posts for "attach files" button to appear. Or can link from say  http://imgur.com   BUT post the .jpg/.png image file rather than a link to it)

 

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

  • Nothing special

 

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

iGPU 

  • AIDA64
    •  

  • Unigine Valley Extreme HD
  • 3d Mark

eGPU

  • Unigine Valley Extreme HD
  • 3d Mark

Comments (eg: how has the eGPU improved your workflow or gaming)

Initially I had a 6750 XT which I got for a great price, but unfortunately Mac only supports very specific GPUs, so I had to return it for the significantly more expensive for effectively the same performance 6800

That was a bit of a shame, but now I can just swap my work macbook with my personal xps on the stand, and transfer a single cable. Frustratingly my wife's macbook is an M1 which isn't supported, so she only gets power, none of the accessories. 

In the back of the eGPU I have the following plugged in which seems to push the USB/PCIE bandwidth to the limit:

  • External Display
  • Network cable
  • Keyboard
  • Mouse
  • Webcam
  • Wireless headphone dongle

When I go over the limit the thing that fails most often is the audio, but it fails in a really weird way. 

Only when I'm playing a game (Valorant, Returnal, Rocket League for example) AND talking/listening on discord, sometimes the audio from the game goes really quiet then comes back, or some of the ambient sounds stop playing. I've unplugged the webcam given I only use that for work, and I'm going to try gaming on Wifi soon to see if that relieves some of the pressure.

The CPU is the biggest bottleneck, but most things I've tried are pretty playable including GTAV. 

I run it in performance mode most of the time, which means it gets pretty hot, but it seems to still run everything okay.

2023 13" Dell XPS 13 9315 [12th,10C,U] + RX 6800 @ 32Gbps-TB4 (Razer Core X Chroma) + Win11 [build link]  


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