AnalysisOpinion / analysisHardware & Compute1 source · Oct 18, 2026

Is using an EGPU viable with ComfyUI?

I am an AI noob and i recently go a rtx 3090 to use with comfyUI.

Proof1 community thread

Key points

  • I already have a RTX 4080 but i want to leverage both.
  • Turns out there is no way i'm fitting both on my current motherboard and in my current case.
  • So basically its down to either i rebuild my system with a new mobo and case (and probably power supply) or turn the 3090 into external gpu connected with thunderbolt.
  • Honestly if i can get decent performance (70% of what i would get out of pcie x8 slot) with a external gpu that would be great cause that's a lot more flexible setup.

Sources (1)

  • [1]Is using an EGPU viable with ComfyUI?
    r/StableDiffusion (top, day) · Oct 18, 04:12 PM
    I am an AI noob and i recently go a rtx 3090 to use with comfyUI.
    I already have a RTX 4080 but i want to leverage both.

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 18, 2026Google Open-Sources Harness2, a Recursive Agent Harnessing Framework
  2. Oct 17, 2026Blown away by Minimax H3 sometimes. It nailed this one!!!!
  3. Oct 17, 2026MOSS-Image LoRA training is now in AcademiaSD LoRAlab Trainer Studio (Base and SFT, under 6 GB VRAM)
  4. Oct 16, 2026Comfy-Org/MOSS-Image
  5. Oct 15, 2026Granite Switch 4.1: Chat, Decisions, and Speech from One Endpoint
  6. Oct 15, 2026NVIDIA Nemotron 3.5 Super VL Powers Specialized Agents with Multimodal Reasoning

Related