L2L · Liquid-to-liquid
Trade shorthand for full direct-to-chip cooling that rejects into a facility water loop through CDUs: the highest-density retrofit path and the most disruptive to a live hall.
Current numbers
132 kW HPE GB200 nominal TDP / up to 142 kW GB300 facility basisL2L direct-to-chip rack density: GB200 NVL72 ~132 kW nominal TDP, GB300 up to ~142 kW facility basis