AYAR LABS AND GUC SIMULATE A 3 KW CO-PACKAGED OPTICS PACKAGE, AND ONLY LIQUID COOLING HOLDS SPEC

Summary from the TLDR Hardware newsletter

Ayar Labs and GUC simulated a 105mm by 140mm package with two XPUs, eight HBM4 stacks, and eight TeraPHY optical engines, offering over 100 Tbps of optical bandwidth at more than 3 kW. A standard air heatsink at 5 to 6 m/s failed spec, while an impingement liquid cold plate at 4.5 L/min kept the optical engines under 100°C. Results use static power assumptions, so dynamic workload simulation is next.