Data center operators investing in direct-to-chip liquid cooling often encounter a frustrating reality: a project that cuts overall power consumption by 10% might only yield a modest 3% improvement in reported Power Usage Effectiveness (PUE).

This white paper explains why standard metrics obscure actual efficiency gains and offers a modern reporting framework to accurately demonstrate ROI to executives, auditors, and clients.

Key insights & takeaways

• Hidden Savings: Lower server fan power shrinks the PUE denominator, masking real facility efficiency gains
• Part-load costs: Remaining 20–30% air heat forces CRAH units into inefficient, high-cost part-load operation
• Better metrics: Tracking facility, PDU, and compute kW separately (TUE) reveals what PUE hides