Laptop external GPU not detected
4.5
An eGPU connected via Thunderbolt is not recognized by the laptop.
Symptoms
- No signal
- Thunderbolt error
- GPU not in list
Possible Causes
- Incompatible cable
- Thunderbolt security settings
- Insufficient eGPU power
Step-by-Step Fix
1
Use Thunderbolt 3/4 Cable
Ensure you aren't using a standard USB-C charging cable.
2
Approve Device
In Thunderbolt Control Center, set the eGPU to "Always Connect".
3
Update Thunderbolt Firmware
Check manufacturer site for NVM firmware updates.
When to See a Technician
eGPUs require a Thunderbolt port with 4 lanes of PCIe for best performance.
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