Product features
- Fully Modular Cabling: Connect only the cables your system needs, making clean and tidy builds easy
- Intel ATX 3.1 Certified: Compliant with the ATX 3.1 power standard, supporting the PCIe Gen 5 platform and resisting transient power spikes
- 140mm Fluid Dynamic Bearing (FDB) Fan: Delivers extremely quiet and long-lasting fan performance
- Powerful CORSAIR iCUE Software: Create custom fan curves, monitor power settings, and toggle between single to multi-rail overcurrent protection (OCP) on-the-fly
- Zero RPM Fan Mode: At low and medium loads the cooling fan switches off entirely for near-silent operation
The CORSAIR HX1500i (2025) is a high-end, fully modular ATX power supply designed to meet the demands of modern, power-hungry PC builds. It supports the latest ATX 3.1 and PCIe 5.1 standards, making it future-proof for upcoming hardware generations such as dual RTX 5090 GPUs.
Detailed Review and Analysis
Performance and Efficiency
The HX1500i delivers a robust 1500W output with an impressive Cybenetics Platinum efficiency rating, which surpasses traditional 80 PLUS Platinum certifications by imposing stricter testing criteria. This translates into up to 92% efficiency under typical loads, reducing wasted energy and heat generation. The unit uses premium Japanese electrolytic capacitors rated at 105°C for enhanced durability and reliability over time.
Design and Build Quality
Corsair continues its tradition of premium build quality with this model. The PSU features a fully modular cabling system that allows users to connect only the cables they need, improving cable management and airflow inside the case. The internal design employs resonant LLC topology combined with DC-to-DC conversion for stable voltage regulation across all rails.
A notable feature is its ultra-low noise operation enabled by a fluid dynamic bearing fan measuring 140mm in diameter. This fan supports Zero RPM mode at low to medium loads, ensuring near-silent operation when full cooling capacity isn't necessary. The PSU also supports Modern Standby sleep mode for faster wake times while consuming less power.
Connectivity & Compatibility
This PSU includes two specialized 12V-2x6 PCIe cables designed specifically for high-power GPUs like NVIDIA’s RTX 5090 series — even supporting dual GPU setups without strain or risk of connector failure thanks to color-coded plugs that ensure secure connections. Compliance with ATX 3.1 means it can handle new motherboard power requirements efficiently.
Software Integration
The HX1500i integrates seamlessly with Corsair’s iCUE software platform, allowing users to customize fan curves, monitor real-time performance metrics such as voltage stability and temperature, adjust power settings digitally via its advanced control board — features typically reserved for enthusiast-grade PSUs.
Pros
- High wattage output (1500W) suitable for extreme gaming/workstation builds.
- Cybenetics Platinum certification ensures top-tier efficiency (~92%).
- Fully modular cabling improves system aesthetics & airflow.
- Supports latest ATX 3.1 & PCIe 5.1 standards.
- Ultra-low noise operation via fluid dynamic bearing fan + Zero RPM mode.
- Premium Japanese capacitors rated at high temperature (105°C).
- Dual specialized GPU cables ideal for powering multiple RTX 5090s safely.
- Advanced digital monitoring/control through Corsair iCUE software.
- Long-term reliability backed by a ten-year warranty.
- Modern Standby support reduces idle power consumption.
Cons
- High price point (~$350), which may be prohibitive outside enthusiast or professional markets.
- Large physical size may pose installation challenges in smaller cases due to extensive cabling options.
- Some users might find software integration unnecessary if they prefer simpler plug-and-play solutions.
Verdict
The CORSAIR HX1500i (2025) stands out as one of the most powerful and efficient PSUs on the market today tailored specifically toward enthusiasts who demand uncompromising performance from their systems—especially those running multi-GPU setups or next-gen components requiring PCIe Gen5 connectivity.
Its combination of cutting-edge electrical design principles like resonant LLC topology alongside user-friendly features such as full modularity plus sophisticated digital controls makes it an excellent choice if budget permits. While pricey compared to mainstream units, this PSU justifies its cost through longevity guarantees (10 years), exceptional build quality, ultra-low noise levels during operation, plus future-proof compatibility that will serve well beyond current hardware cycles.