Seasonic Developing 1,000W Fanless Power Supply with 80 Plus Platinum Certification

Seasonic Prepares 1,000W Fanless Power Supply for High-End PCs

Seasonic is reportedly working on a groundbreaking 1,000-watt passively cooled power supply for desktop computers, according to industry sources. This upcoming model is expected to expand the PRIME Fanless TX series and may be introduced as the Prime Fanless TX-1000. If the reports hold true, the new unit will feature an 80 Plus Titanium efficiency rating, placing it among the most energy-efficient power supplies available for PC enthusiasts and professionals.

Expanding the PRIME Fanless TX Lineup

Currently, Seasonic’s fanless power supply lineup includes models rated at 600W and 700W, such as the PRIME Fanless TX and PX series, as well as the passively cooled Prime Titan. All these units share a compact ATX form factor measuring 170 × 150 × 86 mm, are fully modular for easy cable management, and carry either Titanium or Titanium Plus efficiency certifications. The introduction of a 1,000W fanless model would mark a significant leap, catering to high-performance systems that demand silent operation and exceptional reliability.

Efficiency and Reliability at the Forefront

Reports indicate that the new 1,000W fanless power supply will maintain the hallmark efficiency of the PRIME Fanless TX series, targeting approximately 94% efficiency at 50% load. Like its predecessors, it is expected to offer a mean time between failures (MTBF) of 100,000 hours and a robust 12-year warranty, underscoring Seasonic’s commitment to long-term reliability and customer trust.

Key Details Yet to Be Confirmed

While anticipation builds for the official debut—potentially at CES 2026 in Las Vegas—several important details remain unconfirmed. It is not yet clear whether the new model will support the latest ATX 3.x standard or what its connector configuration will be. Pricing and availability are also unknown, but given that the current Prime Fanless TX-700 retails for around $378 at major US retailers, the 1,000W version is expected to command a premium price.

The development of a 1,000W fanless power supply highlights Seasonic’s ongoing innovation in the field of silent, high-efficiency PC components. As more information becomes available, this model is likely to attract attention from enthusiasts seeking top-tier performance without compromising on noise or reliability.