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Corsair RM1200x Shift Fully Modular ATX Power vs Lian Li SP750 V2 Gold

Updated August 2026 — Corsair RM1200x Shift Fully Modular ATX Power wins on power and cooling, Lian Li SP750 V2 Gold wins on price and size.

The Corsair RM1200x Shift offers superior power capacity and advanced features, making it ideal for high-performance builds, while the Lian Li SP750 V2 Gold is a budget-friendly option for mid-range systems.

Why Corsair RM1200x Shift Fully Modular ATX Power is better

Power Capacity

Corsair offers 1200 watts compared to Lian Li's 750 watts.

Advanced Features

Corsair supports PCIe Gen 5.1 for future-proofing.

Cooling Efficiency

Corsair has a larger 140mm fan for better thermal management.

Why Lian Li SP750 V2 Gold is better

Price

Lian Li is significantly cheaper at $124.99.

Size

Lian Li's SFX form factor is more compact for smaller builds.

Noise Level

Lian Li's 92mm fan is designed for low noise operation.

Overall score

Corsair RM1200x Shift Fully Modular ATX Power
88
Lian Li SP750 V2 Gold
72

Specifications

SpecCorsair RM1200x Shift Fully Modular ATX PowerLian Li SP750 V2 Gold
Wattage1200W750W
ModularityFully ModularFully Modular
Efficiency Rating80 Plus Gold80 Plus Gold
Fan Size140mm92mm
ComplianceATX 3.1ATX 3.1
Warranty10 Years10 Years

Dimension comparison

Corsair RM1200x Shift Fully Modular ATX PowerLian Li SP750 V2 Gold

Overview of the Corsair RM1200x Shift and Lian Li SP750 V2 Gold

When comparing the Corsair RM1200x Shift and the Lian Li SP750 V2 Gold, it’s essential to highlight the significant differences in power capacity and design. The Corsair RM1200x Shift is a robust 1200 watt power supply, while the Lian Li SP750 V2 Gold offers a 750 watt option. This difference in wattage directly influences their suitability for different builds, particularly for high-performance gaming systems or workstations.

The Corsair RM1200x Shift is designed for users requiring more power, especially for setups with multiple graphics cards or high-end components. In contrast, the Lian Li SP750 V2 Gold targets users looking for a reliable power supply for mid-range builds. Understanding these distinctions helps in selecting the right power supply for your specific needs.

Price Comparison

The price of the Corsair RM1200x Shift is $194.99, while the Lian Li SP750 V2 Gold is priced at $124.99. This makes the Lian Li option about 36% cheaper than the Corsair model. For those on a budget or with less demanding systems, the Lian Li provides significant savings without compromising efficiency.

However, the price of the Corsair is reflective of its higher power rating and additional features. For users who need the extra wattage and the benefits of ATX 3.1 compliance that supports PCIe Gen 5.1, the investment could be justified. Ultimately, the choice depends on one's budget and power requirements.

Efficiency Ratings

Both power supplies boast 80 Plus Gold efficiency ratings, ensuring that they operate effectively while minimizing wasted energy. This means both units offer at least 87% efficiency at 20% load, 90% at 50% load, and 87% at 100% load.

The efficiency not only impacts electricity costs but also contributes to lower heat generation, which is crucial for maintaining system stability and longevity. Users can expect reliable performance from both options, though the Corsair RM1200x Shift may have an edge in long-term durability due to its 100% 105°C-rated Japanese electrolytic capacitors.

Modular Design

The Corsair RM1200x Shift features a fully modular design with micro-fit PSU connectors, allowing users to connect only the cables required for their specific build. This design choice makes for cleaner cable management and enhances airflow within the chassis.

Similarly, the Lian Li SP750 V2 Gold is also fully modular, allowing users to connect only necessary cables. However, it highlights its unique native 12V-2x6 connector, which provides enhanced clarity and reliability for high-performance graphics cards. Both designs facilitate easier installations and upgrades, but the Corsair’s side interface may offer even greater convenience.

Cooling Solutions

Cooling is a critical factor in power supply performance, and both models incorporate advanced fan technologies. The Corsair RM1200x Shift includes a 140mm fluid dynamic bearing fan that operates silently in its Zero RPM mode at low and medium loads. This feature is particularly appealing for users seeking a quiet computing experience.

On the other hand, the Lian Li SP750 V2 Gold comes with a premium 92mm fluid dynamic bearing fan, which also emphasizes low noise during operation. While both power supplies prioritize quiet performance, the larger fan in the Corsair model may provide more efficient cooling under heavy loads. Users who prioritize noise levels will find both options suitable, but the Corsair may slightly outperform in thermal management.

Compliance and Standards

Both power supplies comply with the ATX 3.1 standard, ensuring compatibility with modern components and resilience against power spikes. The Corsair RM1200x Shift supports PCIe Gen 5.1, making it future-proof for upcoming graphics cards that require this standard.

In comparison, the Lian Li SP750 V2 Gold is compliant with PCIe Gen 5.0, still ensuring compatibility with a broad range of components. This compliance is crucial for gamers and professionals who intend to utilize the latest technology, making either unit a solid choice depending on future upgrade plans.

Reliability and Warranty

When it comes to reliability, both power supplies offer impressive warranties, with the Corsair RM1200x Shift backed by a ten-year warranty, promising long-term durability and peace of mind. The Lian Li SP750 V2 Gold also features a ten-year hardware protection plan, ensuring that users are covered against defects.

The use of high-quality components in both units, such as Japanese electrolytic capacitors in the Corsair model, suggests that both brands prioritize reliability. Users can expect both power supplies to deliver consistent performance over their lifespan, making them trustworthy options for any build.

Which should you buy?

Choosing between the Corsair RM1200x Shift and the Lian Li SP750 V2 Gold ultimately hinges on your specific needs and budget. If you require a high-capacity power supply with advanced features, the Corsair RM1200x Shift, priced at $194.99, offers exceptional performance and future-proofing capabilities. However, if you are looking for a more budget-friendly option that still delivers quality performance, the Lian Li SP750 V2 Gold at $124.99 is an excellent choice for mid-range systems. Both power supplies are reliable, efficient, and well-suited for modern builds, ensuring that you can’t go wrong with either option based on your requirements.