Shell
One rack out of the air-cooled container in Fig 9, its vented doors open and ghosted, Node 3 slid out with its top cover off and parked at the side. Inside there is no cold plate, no manifold and no hose: each of the four nodes is a DGX B300-class box whose eight GPUs sit under finned heatsinks, and a wall of fan modules at the back of the chassis pulls air through the fins and dumps it — about 18 K warmer — into the hot aisle. The fins run front-to-back so the air channels straight through them. Every number comes from one model object, driven by the load slider; the exhaust temperature is not typed in, it falls out of the air heat balance P = ṁ·cp·ΔT.