Seasonic has announced that its 1,600-watt PRIME ENTERPRISE RX-1600 is the first ATX power supply to receive 80 PLUS Ruby certification at 115 volts. The new efficiency tier emphasizes low-load performance alongside traditional operating points, targeting demanding desktops, workstations, and AI-focused systems.
Key takeaways
- The PRIME ENTERPRISE RX-1600 is rated at 1,600 watts.
- It is the first ATX PSU certified under 80 PLUS Ruby at 115 V.
- Ruby adds efficiency testing at 5% and 10% loads.
- Required efficiency ranges from 85% to 95%, depending on load.
- Seasonic has not announced pricing or broad retail availability.
Ruby certification targets low-load efficiency
The 80 PLUS Ruby standard, administered by CLEAResult, expands testing to six operating points by adding 5% and 10% loads to the levels used by earlier certifications. At 115 V, a qualifying supply must reach 85% efficiency at 5% load, 91% at 10%, 93% at 20%, 95% at 50%, and 91% at full load. It must also maintain a power factor of at least 0.95 at 20% load.
The low-load requirements are particularly relevant to modern PCs, which can spend substantial periods browsing, idling, or performing light workloads rather than operating near peak power.
A high-capacity platform for demanding systems
The PRIME ENTERPRISE RX-1600 is designed for high-end desktop PCs, professional workstations, and AI systems. At this capacity, the supply can support power-hungry processors, multiple graphics cards, and configurations with substantial transient demands, although the 80 PLUS rating itself does not establish compatibility with a specific system or graphics card.
Higher efficiency reduces the amount of input power converted into heat. That can lower cooling requirements and operating costs, with the potential benefits becoming more noticeable in systems that run for long hours or operate in larger deployments.
Engineering changes extend beyond certification labels
Seasonic says achieving Ruby required improvements across the power-supply platform, including switching control, component selection, thermal design, and validation. Meeting the stricter thresholds at both light and heavy loads is more complex than optimizing performance around a single typical operating point.
The certification also marks another milestone in Seasonic’s long participation in the 80 PLUS program. The company says it earned its first certification in 2005 and later became the first manufacturer to achieve 80 PLUS Gold certification in 2008.
What buyers should consider
The RX-1600’s Ruby status is most meaningful for users who need its unusually high output and operate their systems continuously. For a typical gaming PC, a lower-wattage supply may offer better value, and certification figures should not be treated as a complete assessment of voltage regulation, acoustics, protections, or long-term reliability.
Seasonic has not disclosed a price or detailed retail launch information for the 80 PLUS Ruby model. Those details will determine how accessible the new efficiency tier is to PC builders outside workstation and specialized computing markets.