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CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully vs Thermaltake Toughpower SFX 750W 80Plus Platinum

Updated July 2026 — CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully wins on price and wattage, Thermaltake Toughpower SFX 750W 80Plus Platinum wins on efficiency.

The CORSAIR RM1000x offers superior power capacity and warranty, making it the better choice for high-performance systems. The Thermaltake Toughpower SFX is a solid option for budget-conscious builders.

Why CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully is better

Higher Wattage

1000W vs 750W

Longer Warranty

10 years vs 7 years

Better Cooling

140mm fan vs 90mm fan

Why Thermaltake Toughpower SFX 750W 80Plus Platinum is better

Lower Price

$139.99 vs $179.99

Compact Size

SFX form factor

Platinum Efficiency

80Plus Platinum vs Gold

Overall score

CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready Fully
88
Thermaltake Toughpower SFX 750W 80Plus Platinum
76

Specifications

SpecCORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready FullyThermaltake Toughpower SFX 750W 80Plus Platinum
ModularityFully ModularFully Modular
CertificationCybenetics Gold80Plus Platinum
Connector Type12V-2x612V-2x6
Cooling TypeFDB FanFDB Fan
Ripple Noise<30mV<30mV

Dimension comparison

CORSAIR RM1000x ATX 3.1 PCIe 5.1 Ready FullyThermaltake Toughpower SFX 750W 80Plus Platinum

Introduction: Powering Your Build

When it comes to selecting a power supply for your PC, efficiency, reliability, and compatibility are paramount. In this article, we will compare the CORSAIR RM1000x and the Thermaltake Toughpower SFX 750W. The RM1000x, priced at $179.99, offers a robust 1000W capacity and gold efficiency, while the Toughpower SFX comes in at a lower price of $139.99 with a 750W capacity and platinum efficiency. Understanding their features and specifications will help you make an informed decision for your specific needs.

Efficiency Ratings: Gold vs. Platinum

The CORSAIR RM1000x boasts a Cybenetics Gold certification, ensuring an efficiency rating of up to 91%. This translates to lower power consumption and cooler temperatures during operation. In contrast, the Thermaltake Toughpower SFX offers an 80Plus Platinum certification, which generally signifies even higher efficiency levels. While both power supplies are efficient, the Toughpower’s platinum rating indicates that it can provide more usable power with less waste. However, the RM1000x’s higher wattage might appeal to users with more demanding systems.

Modular Design: Fully Modular Benefits

Both power supplies are fully modular, allowing users to connect only the cables necessary for their builds, minimizing clutter and improving airflow. The CORSAIR RM1000x features ultra-flexible embossed cables that enhance the aesthetics and ease of installation. Meanwhile, the Toughpower SFX also offers low-profile cables, which are designed to save space in compact builds. This modularity is particularly beneficial for gamers and PC builders who prefer a cleaner setup, making both options strong contenders in this category.

Power Output: Meeting Your Needs

The power output is a major differentiator between the two products. The CORSAIR RM1000x provides a powerful 1000W, ideal for high-performance gaming rigs or workstations requiring multiple graphics cards or additional peripherals. On the other hand, the Thermaltake Toughpower SFX delivers a solid 750W, which is suitable for most mid-range systems but may not suffice for extreme configurations. If you plan on future upgrades or have a high-end setup, the RM1000x offers a significant advantage with its greater power capacity.

Compatibility: PCIe and Standards

Both power supplies are compliant with the latest ATX 3.1 standards, ensuring compatibility with next-gen hardware. The CORSAIR RM1000x includes a native 12V-2x6 connector, allowing for a direct GPU to PSU connection without the need for adapters. This feature ensures that users can seamlessly connect the latest graphics cards. Similarly, the Thermaltake Toughpower SFX also supports PCIe Gen 5.1 and comes with a native PCIe 12V-2x6 modular interface. Both power supplies are well-equipped for modern builds, but the RM1000x’s direct connection might offer a slight edge in convenience.

Cooling Solutions: Noise Levels

Cooling is a crucial factor for maintaining system stability and longevity. The CORSAIR RM1000x is equipped with a 140mm FDB fan that prioritizes low noise levels, making it suitable for quiet builds. The Toughpower SFX features a 90mm FDB fan, which is efficient for its size but may produce more noise under load compared to the larger fan in the RM1000x. Users who prioritize silent operation may find the cooling solution of the RM1000x more appealing, especially in noise-sensitive environments.

Warranty and Reliability: Peace of Mind

When investing in a power supply, warranty length can be an indicator of reliability. The CORSAIR RM1000x is backed by a substantial ten-year warranty, reflecting the manufacturer's confidence in the product’s durability and performance. In comparison, the Thermaltake Toughpower SFX offers a seven-year warranty. While both warranties are generous, the longer warranty period of the RM1000x may provide additional peace of mind for users looking for long-term reliability.

Price Comparison: Value for Money

The price difference between the two power supplies is noteworthy. The CORSAIR RM1000x retails for $179.99, while the Thermaltake Toughpower SFX is priced at $139.99, making it about 22% cheaper. This lower price could be appealing for budget-conscious builders who still seek a high-quality power supply. However, considering the RM1000x's higher wattage and longer warranty, some users may find the additional investment worthwhile for enhanced performance and reliability.

Which should you buy?

Choosing between the CORSAIR RM1000x and the Thermaltake Toughpower SFX ultimately depends on your specific needs. If you require a high wattage power supply for a demanding gaming or workstation setup, the RM1000x offers superior power capacity, better cooling solutions, and a longer warranty, justifying its higher price. However, if you are building a mid-range system and want to save some money, the Toughpower SFX provides excellent efficiency and modularity at a lower cost. Assess your future upgrade plans and current system requirements to make the best choice for your power supply needs.