OCS · Optical Circuit Switch
A MEMS-mirror switch that reconfigures physical light paths instead of switching packets — the basis of Google's TPU pod interconnect.
Current numbers
9,216chips per Ironwood pod = 42.5 FP8 ExaFLOPS, ~1.77 PB aggregate HBM, OCS 3D-torus
4,614 FP8 TFLOPSper-chip TPU v7 Ironwood; 9,216-chip OCS pod = 42.5 FP8 ExaFLOPS