Beyond the GPU: Why TPUs Are the Hidden Engine for Post-Quantum Blockchain

The article argues that Google's Tensor Processing Unit, rather than the GPU, may be the superior hardware for post-quantum blockchain security, because lattice-based cryptography depends on large matrix and vector operations that TPUs are hard-wired to process. It explains that TPUs use a systolic array architecture, in which data flows through arithmetic units without being written back to memory between steps, which the article says yields much higher throughput for dense math. It also lists adoption barriers, including NVIDIA's CUDA software ecosystem, the difficulty of porting code to JAX or XLA, and high-end TPUs being available almost exclusively through Google Cloud. The article concludes that Web3 hardware will move toward a split stack, with GPUs remaining general workhorses and TPUs becoming standard for zero-knowledge proofs and post-quantum signature verification.