Corsair HX1500i (Gen 4 2025) Power Supply Review

1. Introduction2. Bundle & Cabling3. External4. Internal5. Testing Methodology and Results6. Closing Thoughts7. View All Pages

The latest 4th Generation of the HX1500i builds on the previous models and brings it into 2025 with the latest support for ATX 3.1 and PCIe 5.1. Corsair continue to work with CWT on the design of the new 1200 watt and 1500 watt supplies in this HXi range and many things carry over, such as the adoption of the excellent NR140P Fluid Dynamic Bearing fan.

Technically there is a lot to praise with the latest design. Ripple suppression is excellent and in the top 10% of all units we have tested in recent years.  Efficiency is stellar, hitting over 94% at around 50% load. Load regulation is very tight and we like the fact that the unit has a wide array of protection features sometimes missing on other high end power supplies.

One of the key selling points of this power supply is the low noise, smooth power delivery operation, even at loads up to 1200 watts. It was almost inaudible to my ear in a quiet room from a few meters distance, and even at full load remained relatively quiet. I am a big fan (pun intended) of Corsair's NR140P Fluid Dynamic Bearing fan used in this and previous HXi power supplies. It is one of my favourites. These fans are quite expensive and I have bought some before myself for other projects (around £20 a fan). As a side note, one of the NR140P fans I own has been running in a server now for 4 years – 24 hours a day without any issues (I usually clean it once a year).

Temperatures inside the power supply remain cool under even high load situations thanks to the high levels of efficiency and excellent performance of the aforementioned NR140P. Build quality throughout is exceptional and Corsair have not skimped on quality capacitors, using some of the highest grade Japanese Nippon Chemi Con caps from their KMZ Series. The three primary caps combined can deliver a staggering 1830uF output.

As you would expect, a power supply of this calibre does not come cheap, and it is priced at £299.99 from Corsair's own store HERE. Similar prices can be found across main etailers in the UK, so it falls into the high end of supplies. In reality it is one of the best we have tested, so it justifies the price point. Just be sure you are definitely buying the current Gen 4 version as some of the older versions are still popping up on etailers as we go live with this review.

Pros:

• Delivers a sustained 1,500 watts without a problem.
• 10 year warranty.
• Highest grade 105c rated Japanese Nippon Chemi Con capacitors.
• Extremely efficient.
• High quality cables.
• Very quiet, even at high loads.
• Excellent default fan profile.
• Tight Load Regulation.
• Fully modular.
• iCUE support (but you don't need to use it as default settings are great).
• ATX 3.1 and PCIe 5.1 compliant.
• Super High Grade FDB fan (the NR140P is one of my favourites).
• Expensive, but not super expensive like some we have reviewed lately around £500.

Cons:

• It is not cheap, as you would expect.
• It is physically large.

KitGuru says: The HX1500i is one of the finest, quietest high end power supplies on the market. Corsair have built this unit to the highest standards and have adopted some of the finest quality components inside to ensure long life and smooth power delivery. It is one of the best power supplies we have tested to date and while expensive – compared to others we have tested recently at £500, it offers great value for money.

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