Seasonic PRIME TX-1600 Noctua Edition Review (2025): Ultra-Quiet 1600W Titanium PSU

The Seasonic PRIME TX-1600 Noctua Edition was announced in November 2024. This ATX 3.1 and PCIe 5.1 unit is aimed at power-hungry configurations, performance enthusiasts, and overclockers.

This power supply is not entirely new, as it is a variant of the Seasonic PRIME TX-1600. It stands out thanks to the integration of a Noctua NF-A12x25 fan and an optimized grille. This duo is designed to reduce noise by 8 to 10 dB(A) compared to the standard model. In addition, it comes with a Noctua-style finish and matching cables.

Finally, its 80 PLUS Titanium certification guarantees high efficiency, a key factor in minimizing energy waste. On paper, all this sounds impressive, but does it hold up in real-world use? Are we looking at the ultimate 1.6 KW power supply of the moment? And does it justify its price tag approaching $654?

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The collaboration between Noctua and Seasonic is immediately evident upon opening the packaging. The cardboard box carries the Austrian brand’s signature colors, while the “Prime Noctua Edition” label is highlighted with a metallic silver finish. We also see the TX-1600 model designation and, most importantly, the reassuring mention of a 12-year warranty. Other sides of the packaging highlight key points such as the PSU’s performance, optimized fan grille, 80 PLUS Titanium certification, and compatibility with ATX 3.1 and PCIe 5.1 standards.

The bundle includes a Seasonic and Noctua-branded pouch containing the cabling and accessories. With 1600 watts of power, the unit offers a wide range of connectors.

It features a 20+4 pin ATX (610 mm), three EPS (700 mm), six PCIe 6+2 pin (six cables of 750 mm), sixteen SATA (four cables of 950 mm), two SATA 3.3V (one cable of 550 mm), three Molex via a single 690 mm cable, and two 12V-2×6 pin (two cables) of 700 mm.

A second smaller pouch provides a 24-pin 90-degree adapter to help better conceal the ATX cable.

This adapter also doubles as a tester, with an LED and button to confirm that the PSU is functioning properly.

The power supply immediately stands out with its characteristic “Noctua colors.”

Although it retains the same curves and overall look of the standard PRIME TX-1600, the colors, grille, and visible fan make it a unique variant.

This fan is the well-known NF-A12x25, praised for its performance and quiet operation. However, unlike the standard model, which uses a 135 mm solution, the Noctua Edition opts for a 120 mm fan. Some might see this as a downgrade, but Noctua counters with a custom-designed grille tailored to this PSU to minimize noise.

The steel chassis is painted black, highlighting the iconic brown grille that extends slightly to the side, proudly displaying the “Prime Noctua Edition” name. Two small lateral vents accentuate its sleek appearance. Subtle but effective.

At the rear, there are 19 connectors to accommodate the necessary cabling. Notably, at the center are two PCIe GEN 5 12V-2×6 connectors, designed to power two high-end, energy-hungry graphics cards. This PSU is therefore suitable for extreme gaming PCs as well as workstations.

Internally, it offers a single +12V rail capable of delivering 133.33 A, compared to 25 A on the +3.3V and +5V rails. The 80 PLUS logo on the spec sheet confirms its Titanium certification, meaning extremely high efficiency.

The key focus of this PSU remains noise reduction, even under heavy load. Noctua’s customization claims a reduction of 8 to 10 dB(A) compared to the already quiet standard model. This is achieved through the use of the NF-A12x25 fan and the new grille.

It also features a semi-passive mode, keeping the fan off at typical ambient temperatures up to 25 °C and loads of up to 50% (800 W). In practice, with a well-ventilated case, this Prime TX-1600 Noctua Edition should operate passively most of the time, even during gaming sessions. Once the load passes 50%, the PWM fan starts at 17% of its maximum speed, ramping gradually up to about 45%, which corresponds to 540 to 1200 RPM. At full load (80–100%), it reaches between 2000 and 2400 RPM.

According to Noctua’s data, across the entire 17–100% speed range, this model is about 8 to 10 dB(A) quieter than the normal version. As a result, it achieves an upgraded Cybenetics Lambda noise certification, moving from A to A++.

Inside, Seasonic uses a cable-free design (the rear panel and PCB are connected by a copper plate), high-quality aluminum electrolytic capacitors, gold-plated connectors, and DC-to-DC conversion. Safety features include OPP, OVP, UVP, OCP, OTP, and SCP protections.

One caveat: case compatibility. With dimensions of 150 mm (W) x 86 mm (H) x 210 mm (L), plus the space required for connectors, smaller cases may not accommodate it.

Test protocol & setup

• Motherboard: Asus ROG Maximus XII Extreme
• Processor: Core i9-10900K
• RAM: 4 x 8 GB DDR4-3200 Dominator Platinum RGB (no XMP)
• GPU: Gigabyte GeForce RTX 4090 Gaming OC
• Cooler: Noctua NH-D15 Chromax.Black
• Storage: Corsair MP400 2TB

Measurements included:

• Voltage fluctuations on +12V and +5V rails via digital voltmeters,
• PFC values,
• Noise levels,
• Overall power consumption.

PFC and consumption were measured with a digital wattmeter under various loads: idle (OS loaded, no activity), CPU stress, and GPU stress (100% load). Each test was repeated three times, with averages recorded. We used OCCT 12.0.5 (Power Test).

Note: Maximum consumption was measured with Thermal Throttling disabled. The Core i9-10900K drew between 285–290 W, while the RTX 4090 drew 445–450 W.

We also calculated the financial and environmental yearly cost of running the test platform.

Voltage fluctuations

Results: 0.69% on +5V, 0.49% on +12V, and 0.54% on +3.3V, all well below ATX 3.1 limits. Stability under high load was excellent, though relative given the PSU’s massive 1600 W capacity (our platform only used about 50% of it).

PFC values

Certified under 80 PLUS Titanium, PFC should stay between 0.8 and 1. Our measurements ranged from 0.71 to 0.95, which is excellent. At idle, with only 10% load, results were still consistent.

PFC, or Power Factor Correction, reduces electrical network pollution by minimizing harmonic feedback. The closer to 1, the “cleaner” the PSU. Active PFC, used here, is the most efficient and now standard in high-end PSUs, as it adapts dynamically to current variations for maximum efficiency.

Noise levels

Compared to the 135 mm fan version, this edition’s 120 mm Noctua fan lives up to its promises. Both are fanless at idle, but under load, our sound meter recorded a 1.5 dBA advantage for the Noctua Edition. While measurable, this difference is imperceptible to the ear.

With 32.6 dBA under load, the Prime TX-1600 Noctua Edition is extremely quiet — practically inaudible with our test setup.

Power consumption

No surprises here. With the Titanium certification and shared internal design, efficiency differences between the standard and Noctua versions are minimal. Depending on system load, our platform consumed between 76 and 822 W, with the CPU and GPU being the most demanding components.

Conclusion
It’s time to wrap up. Based on our results, the collaboration between Seasonic and Noctua has delivered something truly exceptional. The Prime TX-1600 Noctua Edition ranks among the most advanced PC power supplies available today. It checks nearly every box: ATX 3.1 and PCIe 5.1 compliance, Titanium-certified efficiency, rock-solid voltage stability, and powerful internals. Add to this a Noctua fan and a custom grille engineered for ultra-quiet cooling, and you get a powerhouse that won’t flinch under extreme loads. Build quality is top-notch, backed by a 12-year warranty.

However, perfection comes at a cost: nearly $654, making it a choice for purists willing to invest without compromise. The other drawback is its XXL size — with 210 mm depth, it won’t fit all cases. Finally, the black-and-brown Noctua color scheme will please fans but may divide opinions on aesthetics.