Navitas Semiconductor announced that its high-power GaNSafe and Gen 3 ‘Fast’ SiC MOSFETs enable their portfolio of 3.2kW, 4.5kW, and 8.5 kW AI data center power supply unit (PSU) reference designs to achieve system efficiencies from 96.5% to 98%, accelerating the adoption of cleaner energy server data center PSUs. These reference designs have not yet been granted 80 PLUS Ruby certification by CLEAResult.
The 80 PLUS certification program assesses and certifies the energy efficiency of internal PSUs in computers and servers. The ‘Ruby’ certification was announced in January 2025 by CLEAResult, the program’s administrating body, following an endorsement by the Green Grid consortium. Ruby certification can only be officially granted by CLEAResult through their own testing and validation process.
Ruby is one of the most rigorous PSU efficiency standards since the ‘Titanium’ certification was released 14 years ago. By way of comparison, Ruby sets an additional 1% system efficiency across all load conditions, except at 50% load (which requires a 0.5% increase), to achieve a new benchmark of 96.5% efficiency.
This new standard offers the industry a clear path to enhanced energy efficiency, helping data centres address the evolving needs of cloud storage, commercial sectors, and the increasing pressure on the grid from AI computing. For example, every Ruby-certified 3.2 kW CRPS185 PSU can save up to 420 kilowatt-hours during a 3-year lifetime. That is the equivalent of over 400 kg of CO2 emissions.
In August 2023, Navitas introduced a high-speed, high-efficiency 3.2 kW CRPS, achieving a 40% smaller size than best-in-class, legacy silicon solutions for power-hungry AI and Edge computing. This was followed by the world’s highest power density 4.5 kW CRPS, achieving a ground-breaking 137 W/in3, and efficiency of over 97%.
In November 2024, Navitas released the reportedly world’s first 8.5 kW AI data centre power supply powered by GaN and SiC that could meet 98% efficiency, complying with the Open Compute Project (OCP) and Open Rack v3 (ORv3) specifications. Additionally, Navitas created IntelliWeave, an innovative patented new digital control technique, that when combined with high-power GaNSafe and Gen 3-Fast SiC MOSFETs, enables PFC peak efficiencies to 99.3% and reduces power losses by 30% reduction compared to existing solutions.
"Compared with Titanium, Ruby cuts the allowable PSU losses significantly and will be critical in enabling the data center industry to reduce its carbon footprint and cut operational costs,” said Gene Sheridan, CEO and Co-Founder of Navitas. “With the industry set to consume 1,000 TWh annually by next year, every percentage point improvement in efficiency represents a reduction of 10 TWh, or approximately 3.5 million tons of CO2. Advances in our GaNSafe and GeneSiC products enable these targets to be met and significantly exceeded."
