CORSAIR RM850x Fully Modular Low-Noise ATX Power vs Thermaltake Toughpower SFX 750W 80Plus Platinum

Introduction to Power Supplies

When choosing a power supply for your computer, two notable options are the CORSAIR RM850x and the Thermaltake Toughpower SFX 750W. Both provide high efficiency and modular designs, but they cater to different needs and preferences. The CORSAIR RM850x is priced at $161.93, while the Thermaltake Toughpower SFX is a bit more budget-friendly at $139.99, making it about 17% cheaper. Understanding their features will help you make an informed decision based on your specific requirements.

Efficiency Ratings

The CORSAIR RM850x boasts a Cybenetics Gold certification, which guarantees up to 91% efficiency. This efficiency translates to lower power consumption and reduced heat generation, making it a solid choice for energy-conscious users. In contrast, the Thermaltake Toughpower SFX holds an 80Plus Platinum certification. While it is still highly efficient, it does not quite reach the same level as the RM850x. The difference in efficiency ratings may impact your electricity bill over time, especially if you run a high-performance system continuously.

Modularity and Cable Management

Both power supplies feature fully modular designs, allowing users to connect only the cables they need for their specific builds. This feature not only simplifies installation but also enhances airflow within the case. The CORSAIR RM850x comes with ultra-flexible embossed cables that are designed to look aesthetically pleasing and make installation easier. On the other hand, the Thermaltake Toughpower SFX also offers low-profile cables, ensuring that cable management remains tidy. However, the visual appeal of the embossed cables in the RM850x might give it an edge for users prioritizing aesthetics.

Compatibility with Modern Hardware

In terms of compatibility, both power supplies meet the ATX 3.1 standards and support PCIe 5.1 graphics cards. The CORSAIR RM850x comes with a native 12V-2x6 connector, simplifying connections with the latest graphics cards without needing an adapter. Similarly, the Thermaltake Toughpower SFX includes a native PCIe 12V-2x6 modular interface, which also supports the newest graphics cards. This means that regardless of the option you choose, you will have the necessary connections for modern hardware, ensuring a seamless experience when upgrading your system.

Size and Form Factor

The form factor can significantly influence your decision, especially if you're building a compact system. The CORSAIR RM850x is a standard ATX power supply, suitable for most builds. In contrast, the Thermaltake Toughpower SFX is designed in a smaller SFX form factor, measuring 125mm in width, 63.5mm in height, and 103.8mm in depth. This smaller size is ideal for compact cases, allowing for more versatile build options. If space is a crucial factor for your build, the Toughpower SFX may be the better choice.

Cooling Solutions

When it comes to cooling, both power supplies utilize different fan technologies. The CORSAIR RM850x features a 140mm FDB fan, which is designed to provide quiet operation while maintaining efficient cooling. Conversely, the Thermaltake Toughpower SFX uses a 90mm FDB fan. While it is also designed to minimize noise, the larger fan in the RM850x may offer better cooling performance under load. If your system is likely to push the power supply to its limits, the superior cooling capabilities of the RM850x could be advantageous.

Warranty and Longevity

The warranty period is another important consideration. The CORSAIR RM850x comes with a ten-year warranty, signaling the brand's confidence in the product's longevity and reliability. In comparison, the Thermaltake Toughpower SFX is backed by a seven-year warranty. While both warranties are substantial, the longer warranty on the RM850x might provide additional peace of mind for those looking to invest in a reliable power supply for the long term.

Which should you buy?

Deciding between the CORSAIR RM850x and the Thermaltake Toughpower SFX ultimately depends on your specific needs. If you prioritize efficiency, aesthetics, and superior cooling, the CORSAIR RM850x is a strong contender despite its higher price of $161.93. However, if you are looking for a more budget-friendly option with excellent performance in a compact form factor, the Thermaltake Toughpower SFX at $139.99 offers great value. Both power supplies are excellent choices, but your decision should hinge on factors such as form factor, cooling requirements, and budget.