simt

Not 'more cores.' The real answers are a 10x memory system, a 16x matrix datapath, and a design that spends transistors on lanes and registers instead of on making one thread wait less. With the numbers for a two-socket server against one H100.

A GPU issues one instruction to 32 threads at once. When those threads want different instructions, the hardware runs each path in turn with the others masked off, and the time is the sum of the paths. The derivation of the cost, the metric that exposes it, and the three fixes that work.