In artificial intelligence infrastructure, the long-running debate over processor architecture—x86 versus Arm—matters far less than most assume. According to Chipstrat, the real moat isn't the instruction set itself, but rather the connection between the CPU and GPU. At the most valuable position—the coherent host—Nvidia's NVLink and AMD's Infinity Fabric make ISA irrelevant; both architectures work equally well. As hyperscalers increasingly pair Arm processors like AWS Graviton and Google Axion with their accelerators, the traditional x86 lock-in is eroding. The instruction set only resurfaces as a competitive factor when a single CPU handles both GPU management and application workloads—a shrinking use case. The takeaway: GPU coherence, not CPU dialect, determines datacenter value.

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