In this video I’m showing my version 3 ITG Cube concept—basically a Steam Machine-style cube that’s actually a DIY OCuLink eGPU dock with a dedicated slot for a NUC/Nukebox-style mini PC (130mm x 130mm x 70mm). The whole point is simple: these Ryzen mini PCs with Radeon 780M iGPU can already game, but with USB4/OCuLink you can push them way further. So I built a palm-sized “dock-in” system around an OCuLink eGPU board and a short ITX RTX 4060, then designed a super print-friendly 3D case (165mm cube, only two parts) that slides everything in on rails. I printed it in ASA so it won’t deform from GPU heat, used M3 threaded inserts so the back plate can be secured with just four screws, and put a 120x15mm fan on top. For power, I did a simple USB-to-PWM wiring trick so the fan runs off 5V USB at a fixed speed—no PWM control, but it’s not loud and it works. Then I tested the setup: the OCuLink link ran at PCIe 4.0 x4 (~64 Gbps), and I explained why that’s not a deal-breaker for an RTX 4060. Finally, I ran real games at 1200p on my 16:10 portable monitor—God of War Ragnarok (~100 FPS), Doom: The Dark Ages (75–90 FPS), Cyberpunk 2077 (95 FPS avg), RDR2 (105 FPS avg), and Shadow of the Tomb Raider (131 FPS avg).