thunderbolt egpu

Thunderbolt eGPUs let a thin Windows laptop or mini PC drive a desktop-class graphics card over a single cable, and this tag collects discussion of how well that actually works. The recurring theme is the bandwidth ceiling: Thunderbolt 4 offers 40 Gbps of bidirectional transport with a 32 Gbps minimum PCIe data requirement, far below a conventional PCIe 4.0 x16 slot. That gap shapes real-world results, including frame-time consistency, display routing, and total cost. A frequent conclusion is that pairing an enclosure with a flagship card like an RTX 4090 can be poor value, while mid-range GPUs often make more sense for upgrading weak integrated graphics.