This article covers Seasonic FOCUS SPX-750 750W ATX23.1.

Overview

The Seasonic FOCUS SPX-750 is a 750W SFX-L form factor power supply certified 80 PLUS Gold and fully modular, compliant with the latest ATX23.1 standard. It delivers high efficiency and stable power delivery in a compact chassis, making it an excellent choice for small form factor (SFF) gaming PCs and compact workstations. The 120mm fluid dynamic bearing fan features Seasonic's S3FC (Smart Silent Fan Control) technology, allowing fanless operation under low loads for near-silent performance. Positioned in the mid-range of high-quality SFX-L power supplies, the FOCUS SPX-750 balances performance and price. It offers a 10-year warranty and premium Japanese capacitors while being more affordable than Seasonic's PRIME series, making it a reliable and cost-effective option for enthusiast builds.

Compatibility Guide

The FOCUS SPX-750 uses the SFX-L form factor (125 × 125 × 63.5 mm). It fits into most SFX-compatible cases, especially those explicitly supporting SFX-L. An included ATX bracket allows installation in standard ATX cases. However, due to the slightly longer depth compared to standard SFX, check cable management space in smaller SFF cases. Fully modular cabling means only necessary cables are connected, reducing clutter. The unit includes two 8-pin EPS cables, four 6+2-pin PCIe cables, a 24-pin ATX main cable, and SATA cables, supporting high-end graphics cards and multiple drives.

Product Info

Released in 2022, the Seasonic FOCUS SPX-750 achieves over 90% efficiency at 50% load, earning 80 PLUS Gold certification. It features 100% Japanese 105°C capacitors, a 120mm FDB fan, and full modularity. Operating temperature range is 0–40°C, with an MTBF of over 100,000 hours. The product comes with a 10-year warranty, one of the longest in its class. Pricing is around ¥40,000 (about $280 USD), typical for a high-quality 750W SFX-L PSU. ATX23.1 compliance ensures compatibility with the latest platform power requirements.

Best Use Cases

SFF Gaming Builds: Perfect for compact cases housing mid-to-high-end GPUs like RTX 4070, thanks to 750W capacity and SFX-L fit. Silent Creative Workstations: Fanless operation at low load and quiet 120mm fan keep noise minimal during video editing or rendering. * Future-Proof Systems: Sufficient wattage for future GPU upgrades and overclocking, backed by a 10-year warranty.

Things to Consider

The SFX-L form factor results in shorter cables than ATX units; check cable lengths for large tower cases. At 750W, it may be overkill for basic office or light gaming rigs—consider a 600W SFX-L if budget is tighter. Competitors like Corsair SF750 and Cooler Master V750 SFX Gold offer similar specs, but Seasonic stands out with its 10-year warranty and premium internal components. Always verify case compatibility, as some ultra-compact cases (e.g., Dan A4-SFX) may not support SFX-L depth.

Product Disclosure (Amazon)

  • Manufacturer: Seasonic
  • Seller: TAISEI商店
  • Fulfilled by: TAISEI商店
  • ASIN: B0B7NRSHDP
  • Note: This article covers a manufacturer-made product based on Amazon listing details.