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

Seasonic is reportedly working on a groundbreaking 1,000W passively cooled power supply for desktop computers, according to industry sources. This upcoming model is expected to expand the renowned PRIME Fanless TX series and may be introduced as the Prime Fanless TX-1000. If the reports hold true, this power supply will feature an 80 Plus Titanium efficiency rating, setting a new benchmark for fanless PSU performance. The official debut is anticipated at CES 2026 in Las Vegas.

Expanding the PRIME Fanless TX Series

Currently, Seasonic’s fanless power supply lineup includes models rated at 600W and 700W, such as the PRIME Fanless TX and PX units, along with the passively cooled Prime Titan. All these models 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 addition of a 1,000W model would significantly broaden the appeal of the PRIME Fanless TX family, especially for enthusiasts and professionals seeking silent, high-capacity power solutions.

Efficiency and Reliability at the Forefront

According to early reports, the new 1,000W fanless PSU will maintain the series’ hallmark efficiency, targeting approximately 94% efficiency at 50% load. Like its predecessors, it is expected to offer a 100,000-hour mean time between failures (MTBF) and a 12-year warranty, underscoring Seasonic’s commitment to reliability and long-term performance.

Key Details Still Under Wraps

While the prospect of a 1,000W fanless power supply is exciting, several important details remain unconfirmed. It is not yet clear whether the new unit will support the latest ATX 3.x standard or what its connector configuration will be. Pricing and availability information is also still unknown. However, given that the current Prime Fanless TX-700 retails for around $378 at major US retailers, the 1,000W model is likely to command a premium price point.

As the demand for silent, high-efficiency power supplies continues to grow among PC enthusiasts and professionals, Seasonic’s upcoming 1,000W fanless PSU could set a new standard for performance and reliability in the market.