Seasonic Prime Enterprise RX-1600 becomes first ATX power supply to achieve 80 Plus Ruby certification at 115V
Seasonic has reached a major milestone in power supply efficiency with its Prime Enterprise RX-1600, a 1600W ATX power supply designed for high-performance PCs, professional workstations, and demanding AI systems. The company says the unit is the first ATX power supply to earn 80 Plus Ruby certification at 115V, placing it in the highest efficiency tier of the 80 Plus program.
The Prime Enterprise RX-1600 is built for systems where both power delivery and energy efficiency matter. Modern enthusiast desktops, creator workstations, servers, and AI-focused machines can draw significant power, especially under heavy workloads. In these environments, even small improvements in efficiency can reduce wasted energy, lower heat output, and improve long-term operating costs.
The 80 Plus Ruby certification is especially difficult to achieve because it goes beyond earlier efficiency standards. It is not enough for a power supply to perform well only at medium or high loads. Ruby certification also requires strong efficiency at very low system loads, which is important because many high-end PCs and workstations spend a large amount of time running below peak power draw.
To qualify for 80 Plus Ruby at 115V, a power supply must reach at least 85% efficiency at 5% load, 91% efficiency at 10% load, 93% efficiency at 20% load, 95% efficiency at 50% load, and 91% efficiency at full load. It must also maintain a power factor of at least 0.95 at 20% load. These requirements make Ruby one of the most demanding certifications currently available for consumer and professional power supply units.
Sea Sonic CEO Walter Sun highlighted the company’s long history with the 80 Plus program, noting that Sea Sonic has been involved since the program began. The company’s first certified PC power supply arrived in 2005, followed by its first Gold-certified unit in 2008. According to Sun, reaching Ruby certification at 115V reflects the company’s continued engineering focus on efficiency.
Sun also explained that improving power supply efficiency at this level becomes increasingly challenging, as every additional percentage point requires significant work. However, those small efficiency gains can create meaningful energy savings when applied across large numbers of systems worldwide.
Seasonic says achieving 80 Plus Ruby certification required improvements throughout the entire power supply platform. That includes switching control, thermal design, component selection, and validation. In other words, this is not just a minor update or branding change; it reflects deeper engineering work across the PSU’s internal design.
For most everyday gaming PCs, a 1600W power supply like the Prime Enterprise RX-1600 may be more than necessary. However, for high-end workstations, AI development systems, professional rendering machines, and power-hungry multi-component setups, this level of efficiency can be valuable. Lower wasted energy means less heat, potentially quieter cooling, and better long-term reliability in systems that run for extended periods.
The Seasonic Prime Enterprise RX-1600 stands out as an important step forward for high-efficiency ATX power supplies. As desktop hardware continues to become more powerful and energy demands increase, premium power supplies with stronger efficiency ratings are likely to become more important for builders who want maximum performance with reduced energy waste.
