be quiet! Straight Power 12-1500w Modular Power vs Corsair HX1000i Fully Modular Ultra-Low Noise ATX
Updated August 2026 — be quiet! Straight Power 12-1500w Modular Power wins on power and features, Corsair HX1000i Fully Modular Ultra-Low Noise ATX wins on price and noise.
The be quiet! Straight Power 12-1500w offers superior power capacity, while the Corsair HX1000i excels in software customization and noise control. Choose based on your specific needs.
Why be quiet! Straight Power 12-1500w Modular Power is better
Power Capacity
1500W vs 1000W
Efficiency
93.9% efficiency rating
Cooling
Silent Wings fan design
Why Corsair HX1000i Fully Modular Ultra-Low Noise ATX is better
Price
$234.99 vs $254.99
Software
iCUE software compatibility
Noise Control
Zero RPM fan mode
Overall score
Specifications
| Spec | be quiet! Straight Power 12-1500w Modular Power | Corsair HX1000i Fully Modular Ultra-Low Noise ATX |
|---|---|---|
| Wattage | 1500W | 1000W |
| Efficiency Rating | 80 PLUS Platinum | 80 PLUS Platinum |
| Fan Size | 135mm | 140mm |
| Modular | Yes | Yes |
| Warranty | 10 years | 10 years |
Dimension comparison
Overview of the Products
In this comparison, we will explore two high-end power supplies: the be quiet! Straight Power 12-1500w Modular Power Supply and the Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply. The be quiet! unit is priced at $254.99, while the Corsair model comes in at $234.99, making it about 8% cheaper. Both are designed for high-performance gaming and computing systems, but they come with distinct features that may sway your decision.
Efficiency Ratings
Both power supplies boast impressive efficiency ratings, both certified with 80 PLUS Platinum. The be quiet! Straight Power offers an efficiency of up to 93.9%, ensuring minimal power loss and cooler operation during demanding tasks. On the other hand, the Corsair HX1000i is also rated for 80 PLUS Platinum efficiency, which is essential for maintaining energy savings and system performance. This similarity in efficiency means that either choice will provide excellent power management, reducing overall energy consumption effectively.
Power Capacity
When it comes to power capacity, the be quiet! Straight Power stands out with a remarkable 1500W output. This allows it to handle significant power excursions, accommodating even the most demanding graphics cards and processors without a hitch. In contrast, the Corsair HX1000i supports a solid 1000W output, which is sufficient for most high-end systems but might limit extreme configurations. If you plan on future-proofing or utilizing multiple high-performance GPUs, the be quiet! model offers a considerable advantage in terms of power capacity.
Noise Levels
Noise performance is a key factor for many users, and both power supplies excel in this area. The be quiet! Straight Power features a virtually inaudible Silent Wings 135mm fan, designed for optimal airflow while minimizing noise. Conversely, the Corsair HX1000i utilizes a 140mm Fluid Dynamic Bearing fan that promises ultra-low noise levels as well. Additionally, it features a Zero RPM fan mode, allowing the fan to turn off entirely under low to medium loads for near-silent operation. In terms of noise reduction, both products deliver outstanding performance, but the Corsair's Zero RPM mode gives it a slight edge.
Build Quality and Durability
Build quality is vital for ensuring longevity and reliability in power supplies. The be quiet! Straight Power incorporates Japanese 105°C capacitors, which are essential for stability and durability. Similarly, the Corsair HX1000i also uses Japanese 105°C-rated electrolytic capacitors, ensuring a long lifespan and reliability. Both power supplies are backed by a 10-year warranty, which is indicative of their manufacturers' confidence in their products' durability. The choice between them in terms of build quality comes down to brand preference, as both are constructed with high-quality components.
Cable Management
When it comes to cable management, both power supplies are fully modular, allowing users to connect only the cables they need, which contributes to a cleaner and more organized build. The be quiet! Straight Power’s modular design simplifies the installation process, making it easier for users to optimize airflow within their cases. The Corsair HX1000i also features fully modular cabling, which aids in creating tidy setups and is compatible with its iCUE software for additional customization. Both power supplies excel in this category, making them suitable for users who prioritize neatness.
Software and Customization
The Corsair HX1000i has a distinct advantage when it comes to software integration. Its compatibility with the CORSAIR iCUE software allows users to create custom fan curves, monitor power settings, and toggle between single to multi-rail overcurrent protection on the fly. This level of customization offers a more interactive user experience. In contrast, the be quiet! Straight Power does not mention any software compatibility, which might be a drawback for users looking for advanced control over their system's performance. If software control is important to you, the Corsair model is the better choice.
Which should you buy?
Ultimately, deciding between the be quiet! Straight Power 12-1500w Modular Power Supply and the Corsair HX1000i Fully Modular Ultra-Low Noise ATX Power Supply depends on your specific needs. If you require a higher power capacity for a more demanding setup and value long-term reliability, the be quiet! model is a strong contender despite its higher price. However, if you prefer a more budget-friendly option with excellent noise control and software customization, the Corsair HX1000i, priced at $234.99, is an outstanding choice. Both power supplies are exceptional, but understanding your priorities will guide you toward the right selection.

