CORSAIR RM750e ATX 3.1 PCIe 5.1 vs Lian Li SP750 V2 Gold

Design and build quality

Both power supply units feature a fully modular design, allowing users to connect only the cables necessary for their specific system build. This reduces clutter inside the chassis and improves airflow. The {{PRODUCT_A_NAME}} utilizes 105°C-rated capacitors to deliver steady and reliable power, ensuring dependable electrical performance over time. The {{PRODUCT_B_NAME}} emphasizes reliability with a 10-Year Hardware Protection plan, signaling confidence in its internal components and build longevity. While both units are designed for modern systems, the protection warranty on the {{PRODUCT_B_NAME}} provides additional peace of mind for long-term usage.

Power efficiency and standards

Efficiency is a critical factor for power supplies, impacting heat generation and electricity costs. The {{PRODUCT_B_NAME}} is explicitly marketed as a Gold unit, indicating high efficiency levels under typical loads. The {{PRODUCT_A_NAME}} is described as reliable and efficient but does not explicitly state an 80 Plus rating in the provided features, though it meets the ATX 3.1 power standard. Both units are compliant with the ATX 3.1 power standard, ensuring they meet modern efficiency and performance baselines. The {{PRODUCT_B_NAME}} also features an upgraded 5VSB rail, increasing current capacity to better support power-hungry peripherals during standby modes.

Cooling and noise performance

Thermal management is handled differently between the two models. The {{PRODUCT_A_NAME}} employs a 120mm rifle bearing fan with a specially calculated fan curve designed to keep noise levels down even at full load. The larger fan size can often move more air at lower RPMs compared to smaller fans. Conversely, the {{PRODUCT_B_NAME}} is equipped with a premium 92mm FDB (Fluid Dynamic Bearing) fan. FDB fans are generally known for quieter operation and longer lifespan compared to rifle bearings. The {{PRODUCT_B_NAME}} ensures efficient and quiet thermal performance, though the smaller fan size may require higher RPMs to move equivalent air volume.

Connectivity and cabling

Modern graphics cards require specific power connections to operate safely and efficiently. The {{PRODUCT_A_NAME}} supports the PCIe 5.1 platform and withstands 2x transient power excursions from the GPU, ensuring stability during spike events. The {{PRODUCT_B_NAME}} features a native 12V-2x6 power cable with visual cues for safe connections. This enhances clarity and reliability for high-performance 50/40 series graphics cards. The two-tone cable design on the {{PRODUCT_B_NAME}} helps users verify proper seating, reducing the risk of connection issues common with earlier 12VHPWR connectors.

Safety and protection features

Safety mechanisms protect both the power supply and the connected components from electrical faults. The {{PRODUCT_A_NAME}} relies on 105°C-rated capacitors to maintain stable power delivery under thermal stress. The {{PRODUCT_B_NAME}} backs its reliable power with a 10-Year Hardware Protection plan, offering comprehensive coverage. Additionally, the {{PRODUCT_B_NAME}} includes an upgraded standby power rail, increasing capacity from 2.5A to 3A. This improvement better supports today's power-hungry peripherals that draw energy even when the system is in low-power states.

Compatibility and system support

Both units are designed to support modern platform requirements. The {{PRODUCT_A_NAME}} is Modern Standby Compatible, enabling extremely fast wake-from-sleep times and better low-load efficiency. This is crucial for users who frequently put their systems to sleep rather than shutting them down completely. The {{PRODUCT_B_NAME}} supports the PCIe Gen 5.0 platform and resists transient power spikes, making it suitable for high-end gaming rigs. Both units adhere to the ATX 3.1 standard, ensuring broad compatibility with current motherboards and components.

Price and value

Cost is a significant differentiator between these two options. The {{PRODUCT_A_NAME}} is priced at $89.99, offering a cost-effective solution for builders seeking ATX 3.1 compliance without premium pricing. The {{PRODUCT_B_NAME}} is listed at $124.99, reflecting its additional features such as the native 12V-2x6 connector and extended warranty. For budget-conscious builds, the {{PRODUCT_A_NAME}} provides strong value. However, users prioritizing long-term protection and specific connector safety may find the extra investment in the {{PRODUCT_B_NAME}} worthwhile.

Which one should you buy?

Choosing between the {{PRODUCT_A_NAME}} and the {{PRODUCT_B_NAME}} depends on your specific priorities. If budget is the primary concern, the {{PRODUCT_A_NAME}} delivers solid performance and ATX 3.1 compliance at a lower price point with a larger cooling fan. However, if you require the latest connector safety features and extended warranty coverage, the {{PRODUCT_B_NAME}} is the superior choice. Its native 12V-2x6 connector and FDB fan technology offer enhanced reliability for high-performance systems. Ultimately, the {{PRODUCT_B_NAME}} provides a more premium package for enthusiasts willing to pay extra for advanced features.