d-Matrix's Raptor accelerator bonds compute die to custom DRAM, achieving 100 TB/s per card

At Hot Chips 2026, d-Matrix introduced Raptor, which it claims is the first 3D DRAM accelerator for generative inference. The design places a TSMC 4nm compute die face-to-face on a custom DRAM die with a 36-micron pitch, enabling 100 TB/s of memory bandwidth per card. This stacking approach aims to reduce data movement bottlenecks in AI workloads.