Seasonic's PRIME ENTERPRISE RX-1600, a 1600W ATX power supply, has become the first unit to achieve 80 Plus Ruby certification at 115V—the highest efficiency tier in the 80 Plus program. It's aimed at demanding desktops, workstations, and AI systems rather than typical gaming builds.
Seasonic has announced that its PRIME ENTERPRISE RX-1600, a 1600W ATX power supply, is the first unit to earn 80 Plus Ruby certification at 115V, according to TechPowerUp and Wccftech. Ruby is the newest and most demanding tier in the 80 Plus program, administered by CLEAResult, and it's designed for high-wattage desktops, workstations, and AI-oriented systems where efficiency and thermal management matter most.
What sets Ruby apart from earlier tiers is its focus on efficiency at low load, not just at peak output. To qualify at 115V, a power supply must hit 85% efficiency at 5% load and 91% at 10% load, in addition to 93% at 20%, 95% at 50%, and 91% at 100% load, along with a power factor of at least 0.95 at 20% load. Since many systems spend most of their time idling or under light load, this requirement pushes manufacturers to improve efficiency across the entire usage range rather than just at heavy load, where older certifications focused.
Seasonic has a long track record of 80 Plus firsts, including the first certified PSU in 2005 and the first 80 Plus Gold certification in 2008, and the company frames the RX-1600's Ruby certification as a continuation of that engineering focus. Achieving this tier reportedly required improvements across switching control, thermal design, component selection, and validation. Wccftech notes that for typical consumers, this level of certification may be overkill, but for workstations and AI systems that run for extended periods, every additional point of efficiency reduces wasted energy and heat output, which matters more at scale.
What We Know
| Spec | Detail |
|---|---|
| Model | Seasonic PRIME ENTERPRISE RX-1600 |
| Wattage | 1600W |
| Certification | 80 Plus Ruby (first ATX PSU to achieve this at 115V) |
| Efficiency at 5% load | 85% |
| Efficiency at 10% load | 91% |
| Efficiency at 20% load | 93% |
| Efficiency at 50% load | 95% |
| Efficiency at 100% load / Power Factor at 20% load | 91% / at least 0.95 |
Frequently Asked Questions
What is the Seasonic PRIME ENTERPRISE RX-1600?
It's a 1600W ATX power supply from Seasonic designed for demanding desktops, workstations, and AI systems, and it's the first ATX PSU to achieve 80 Plus Ruby certification at 115V.
What is 80 Plus Ruby certification?
Ruby is the newest and most demanding tier in the 80 Plus efficiency program. At 115V, it requires 85% efficiency at 5% load, 91% at 10% load, 93% at 20% load, 95% at 50% load, and 91% at 100% load, plus a power factor of at least 0.95 at 20% load.
How is Ruby different from previous 80 Plus tiers like Titanium or Platinum?
According to the source material, Ruby specifically adds strict efficiency requirements at very low loads (5% and 10%), which is where many systems spend most of their operating time, whereas earlier tiers focused more on medium-to-high load efficiency.
Who is the RX-1600 designed for?
Seasonic and Wccftech describe it as intended for high-end workstations, AI-oriented systems, and demanding desktop configurations, noting it may be more efficiency than typical consumer systems need.
