An eGPU can bring desktop-class graphics to a laptop, but cables, bandwidth limits and extra costs can eat into the advantage.
Connecting a desktop graphics card to your laptop seems like a neat solution to one of the oldest problems in portable computing. Use the thin machine for work and travel, and connect to a much more powerful GPU when you get home. An external GPU (eGPU) can do just that, but all that extra graphics power still has to travel through Thunderbolt or USB4 instead of the direct internal connection used by a built-in laptop GPU. That bandwidth bottleneck can eat into the desktop card's advantage, and the cable it's…
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