オウルテック Seasonic製 ATX電源 1000W 80PLUS Platinum認証フルモジュラー ハイブリッドファンコントロール 135mm FDBファン搭載 PRIME-PX Sシリーズ 12年間長期交換保証 PRIME-PX-1000S

This article covers オウルテック Seasonic製 ATX電源 1000W 80PLUS Platinum認証 フルモジュラー ハイブリッドファンコントロール 135mm FDBファン搭載 PRIME-PX Sシリーズ 12年間長期交換保証 PRIME-PX-1000S.

Overview

The Owltech PRIME-PX-1000S is a premium ATX power supply built by Seasonic, one of the most trusted OEMs in the industry. Rated at 1000W with 80 PLUS Platinum certification, it achieves over 90% efficiency at 20% load, over 92% at 50% load, and over 89% at full load. The fully modular cable design allows you to use only the cables you need, simplifying cable management and improving airflow inside your case. Backed by an exceptional 12-year warranty, this PSU is built for long-term reliability. This unit is ideal for high-end gaming rigs or workstations that demand stable, clean power. It features a 135mm FDB (Fluid Dynamic Bearing) fan with hybrid fan control, which stops the fan under light loads for near-silent operation and automatically adjusts speed based on temperature and load.

Compatibility Guide

The PRIME-PX-1000S follows the standard ATX form factor, fitting most ATX and some EATX cases with sufficient clearance. The fully modular cable set includes one 24-pin ATX, two 4+4-pin EPS, six 6+2-pin PCIe, twelve SATA connectors, and four Molex connectors, covering virtually any high-end configuration. However, please note that this unit does not include a native 12VHPWR (12+4 pin) connector; if you plan to use an RTX 30/40 series GPU, you will need to use the adapter provided with the graphics card or purchase an aftermarket 12VHPWR cable.

Product Info

Released around 2021, the PRIME-PX-1000S is positioned as a flagship power supply in Seasonic's PRIME lineup. It retails for approximately ¥32,400 (as of May 2026) and carries a 12-year replacement warranty – one of the longest in the industry. Key technologies include Micro Tolerance Load Regulation (MTLR) which keeps output voltage deviation below 0.5%, and a cableless backpanel design that replaces traditional modular cables with direct copper connections for improved signal integrity and reduced failure points.

Best Use Cases

High-end gaming PC: With 1000W capacity and Platinum efficiency, this PSU can comfortably handle flagship CPUs (Core i9, Ryzen 9) and top-tier GPUs like the RTX 4090 or Radeon RX 7900 XTX, even under sustained gaming loads. The fully modular design makes cable routing clean and easy. Content creation workstation: For users who run long rendering sessions or video encodes, the high efficiency translates into lower heat output and quieter operation. The 12-year warranty ensures peace of mind for professional environments where longevity matters. Silence-oriented builds: The hybrid fan control stops the fan completely under low to moderate loads, making this an excellent choice for home theater PCs or office systems where noise is a critical factor.

Things to Consider

This 1000W unit may be overkill for mid-range systems – a 750W or 850W Platinum model could save money without sacrificing efficiency. Be aware of the lack of a native 12VHPWR connector; while adapters work, some users prefer a direct cable for aesthetics or reliability. Also, the PSU is slightly longer (170mm depth) than some compact ATX units, so double-check case dimensions if you have a small form factor case. Finally, while the warranty is handled by Owltech (the Japanese distributor), the actual unit is a Seasonic PRIME – support channels are clearly defined, but international users should verify RMA options in their region.