User mounts three GPUs in a single case using 3D printing and Oculink

A Reddit user has constructed a custom "Frankenbox" workstation that houses three graphics cards within a standard PC case, despite the chassis only natively supporting one. The build combines an AMD Radeon RX 9070 XT, an NVIDIA GeForce GTX 1080 Ti, and an RX 5700 XT.

The system is powered by a single 1400W PSU and features an AMD Ryzen 9 9850X3D CPU with 64 GB of RAM. The external GPU is connected via Oculink using an M.2 adapter, while the internal cards are secured through extensive custom 3D printing.

The user notes that the setup was driven by personal interest rather than immediate utility for local AI workloads, citing high hardware costs in Canada as a constraint on upgrading to better cards.