Category: Hardware
eGPU on an old Toshiba Satellite S55t C5222 HD Laptop
After seeing this video, I attempted the project.
I was able to connect a desktop [NVIDIA Geforce GTX 680] to a [Toshiba Satellite S55T-C5222 Laptop] which uses a [PA5195U-1BRS] battery.

I had to disconnect the WIFI module in order to connect the [PCIE M.2 cable] which connects to the [EXP GDC Beast eGPU] instead of using the supplied mini PCIE cable.
And then reattach the ethernet and USB connector.
I used a [650W Power Supply] which came with a 20+(4 pin) which I disconnected the 4 pins to connect with the 20 pin connector on the eGPU. The CPU 4-pin connector powers the eGPU. And the two GPU 6 pin connectors power the graphics card. I can use the power switch on the power supply to turn on/off the graphics card.
In the end, the NVIDIA 680 did work but I kept getting BSODs (blue screen of death). I feel like a newer graphics card would have done better but they aren’t available right now at even reasonable prices.

Youbionic Avatar Full Arms
Disconnecting the LAN connector is definitely NOT obvious
Authentic Intel Dual Band Wireless AC-7265NGW For Laptop, Built-in Bluetooth 4.2
The WIFI card had a M.2 connector instead of a Mini PCI-E connector, so I needed a different cable.
Arduglasses
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An External GPU for an old Laptop?
[Laptop External Independent Video Card Graphics Dock Mini PCI-E Version for V8.0 EXP GDC Beast]

Testing with old [Toshiba Satellite S55t C5222 HD] laptop…
There should be a PCI-Express connector under the WIFI adapter.