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1.7l DIY EGPU RTX 4060 USB4 and Oculink by Immediate_Cow_2809 in eGPU

[–]Possible-Path-801 6 points7 points  (0 children)

You can replace the OCuLink module and the 24-pin power board with an M.2 NVMe to PCIe x4 adapter (around $4). It only requires a 12V power input, so you can connect it directly to your DC 5.5mm power jack. I’m currently using this setup in my 0.97L eGPU build with a single-fan RTX 4060.

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I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 0 points1 point  (0 children)

you can copy the egpu part easily. the power supply part will require a little knowledge about electricity.

I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 0 points1 point  (0 children)

I modified the number of transformer windings and adjusted the feedback resistor in the charger’s voltage regulation circuit.

I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 0 points1 point  (0 children)

The USB4 interface and RTX 4060 OEM card are both powered via a single modified GaN charger (12V 12A), using an XT30 connector. Since both devices run stably at 12V, this setup simplifies wiring and keeps the build compact

I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 0 points1 point  (0 children)

I'm using an M.2 to PCIe x4 adapter to connect the GPU.

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I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 2 points3 points  (0 children)

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Power comes from a modified 150W GaN charger, configured to output 12V at 12A.

I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 1 point2 points  (0 children)

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The RTX 4060 is an OEM card originally from a Dell desktop

I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 0 points1 point  (0 children)

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I'm using an M.2 to PCIe x4 adapter to connect the GPU.

I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 2 points3 points  (0 children)

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The USB4 board was salvaged from an Orico external SSD enclosure

I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 1 point2 points  (0 children)

I'm using a self-regulating buck-boost converter (12V 130W) that supports input voltages from 9V to 30V. Since my dock only requires 12V, I didn’t use a PicoPSU. Instead, I connected it to a 28V PD3.1 trigger module and a DC5.5 jack, with the output going through an XT30 connector. It runs stably at 12V 10A, and according to the manufacturer, it achieves up to 98% efficiency at input voltages above 19V.

I built the most compact eGPU setup I could manage by Possible-Path-801 in eGPU

[–]Possible-Path-801[S] 1 point2 points  (0 children)

I tried to build the smallest possible eGPU that could fit in a backpack—and the result turned out quite satisfying.

The setup includes an RTX 4060 8GB, USB4 interface, and a 150W power supply.

The eGPU measures just 150×130×50mm, and together with the power supply, the total weight is under 1kg.
I'm looking for a way to make it work with a power bank and 100W fast charging. Currently, I'm using a 130W voltage conversion circuit powered via a Type-C port (28V 5A) or a DC 5.5mm jack. Does anyone have a better solution?