The Surface Laptop Ultra is the most powerful laptop Microsoft has ever built. It pairs NVIDIA’s Blackwell RTX GPU with up to 128GB of unified memory, full CUDA support, and 1 petaflop of AI compute. As we covered when RTX Spark launched, that is enough to run 120 billion parameter AI models entirely on the device, without sending a single byte to the cloud. The unified memory is worth paying attention to. Instead of splitting RAM between your CPU and GPU, the system dynamically...

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