I’m having a persistent issue connecting Razer Core X V2 (TB5) to Eurocom Raptor X18 laptop.
Problem:
- Enclosure powers on normally (GPU fans + lighting active)
- System detects the enclosure, but the RTX 5090 inside is recognized but unable to establish a stable connection via TB5 (Windows keeps cycling until it times out).
- The RTX 5090 keeps showing up in the Device Manager but disappearing after Windows cycles out.
- Device Manager shows PCIe Upstream Switch Port – Code 10
- Connecting the eGPU often causes the internal laptop GPU to fail and fall back to Microsoft Basic Display Adapter
Steps already taken:
- Verified Windows integrity (DISM + SFC clean)
- Cleaned background software (removed non-essential startup apps)
- Tested multiple connection sequences (cold plug, hot plug, different power order)
- Attempted NVIDIA driver install (fails during download)
- Confirmed proper PSU installation and cabling
- Repeated tests produce the same result
Current state: The enclosure is detected, but the GPU never initializes, and the connection destabilizes the system graphics stack after Windows cycles out trying to establish the connection.
Request: Please advise on:
- Recommended TB5 connection/boot sequence
- Required drivers or firmware for Core X V2
- Any known compatibility issues with systems that already have a dedicated NVIDIA GPU
- Diagnostic logs you’d like me to provide
- Next steps if this indicates a hardware or firmware issue