Use your Nvidia GPU's VRAM as swap space on Linux

nbd-vram is a Linux tool that repurposes unused NVIDIA GPU VRAM as high-speed swap space, particularly useful for hybrid graphics laptops with soldered memory. It works by running a daemon that allocates GPU memory via CUDA and serves it as a block device, allowing the kernel to treat it as swap with microsecond-level latency instead of the millisecond delays of SSD swap. In testing on an RTX 3070 laptop, this approach tripled total addressable memory to approximately 46 GB and reduces system stutters under memory pressure without requiring kernel modules or special permissions.