CORSAIR RM1200x SHIFT Fully Modular ATX Power Supply - 80 PLUS Gold - ATX 3.1 - vs Gigabyte P750BS 80 Plus Bronze Non Modular 750w Power Supply Unit

Power Efficiency and Certification

The CORSAIR RM1200x SHIFT is the more efficient power supply, boasting an 80 PLUS Gold certification, whereas the Gigabyte P750BS holds an 80 PLUS Bronze rating. This difference means the CORSAIR unit converts more electrical power with less energy lost as heat, typically translating into better energy savings and potentially lower electricity bills over time. The Gigabyte P750BS operates at a respectable Bronze level, which still ensures decent efficiency but is generally around 82-85% efficient compared to the Gold standard of roughly 87-90%. For users prioritising energy efficiency and lower operational costs, the CORSAIR RM1200x SHIFT’s Gold certification provides a clear advantage.

Modularity and Cable Management

When it comes to modularity, the CORSAIR RM1200x SHIFT is fully modular, while the Gigabyte P750BS is non-modular. This means that with the CORSAIR, users connect only the cables they require, which reduces cable clutter and improves airflow inside the PC case. The CORSAIR also features innovative side-positioned modular connections, making cable access easier and cable management simpler. In contrast, the Gigabyte P750BS has fixed cables, limiting flexibility and potentially leading to more tangled or obstructive cable arrangements. For system builders who prioritise neatness and ease of assembly, the CORSAIR’s fully modular design is a significant benefit.

Cooling and Noise Performance

The CORSAIR RM1200x SHIFT uses a 140mm fluid dynamic bearing fan with a specially calculated fan curve designed for high performance and low noise. This larger fan size generally means quieter operation due to slower fan speeds needed to move the same amount of air. The Gigabyte P750BS employs a smaller 120mm silent fluid dynamic bearing (FDB) fan. Although both use fluid dynamic bearing technology, which is known for durability and quieter operation compared to sleeve bearing fans, the CORSAIR’s larger fan and optimised curve suggest it may run quieter and cooler under load. Users sensitive to noise or requiring quieter environments may find the CORSAIR’s cooling solution more appealing.

Power Output and Compatibility

The CORSAIR RM1200x SHIFT delivers 1200 watts of power, which is significantly higher than the Gigabyte P750BS’s 750 watts. This difference is important for users building high-end or heavily overclocked systems requiring more power headroom. Additionally, the CORSAIR is Intel ATX 3.1 certified, meaning it supports the latest PCIe Gen 5.1 platform and is designed to handle transient power spikes safely and reliably. The Gigabyte unit does not specify ATX 3.1 compliance, which could limit compatibility or performance with the newest generation hardware. For future-proofing and high-demand builds, the CORSAIR offers clear advantages in power output and modern standard support.

Build Quality and Components

The CORSAIR RM1200x SHIFT uses 100% 105°C-rated Japanese electrolytic capacitors, which are premium internal components known for durability and stable power delivery under high temperatures. This implies a longer lifespan and better reliability. The Gigabyte P750BS does not specify capacitor quality but includes essential protections such as over-voltage, over-power, short circuit, under-voltage, over-current, and over-temperature protection, ensuring a basic level of safety and component protection. While both units offer protective features, the CORSAIR’s use of high-quality capacitors suggests a more robust build quality aimed at long-term reliability.

Protection Features and Safety

Both power supplies provide a range of protection mechanisms, but the Gigabyte P750BS explicitly lists its comprehensive protections including OVP (over-voltage protection), OPP (over-power protection), SCP (short circuit protection), UVP (under-voltage protection), OCP (over-current protection), and OTP (over-temperature protection). The CORSAIR RM1200x SHIFT does not detail these protections in its feature list but being Intel ATX 3.1 certified implies compliance with modern safety and performance standards, which typically encompass robust protection systems. While the Gigabyte openly enumerates its safety features, the CORSAIR’s certification status suggests equivalent or superior protection, especially for demanding PC components.

Price and Value

There is a substantial price difference between the two power supplies: the CORSAIR RM1200x SHIFT is priced at £174.98, compared to the Gigabyte P750BS at £65.01. This reflects the CORSAIR’s higher wattage, fully modular design, premium components, and certification to the latest standards. The Gigabyte offers a more budget-friendly option suitable for mid-range builds that do not require extreme power or modularity. Buyers need to balance their specific power requirements, build complexity, and budget when choosing between the two, as the CORSAIR delivers advanced features and power capacity at a significantly higher cost.

Which should you buy?

Your choice depends largely on your system needs and budget. If you require a high wattage power supply with fully modular cables, premium internal components, and compliance with the latest Intel ATX 3.1 standard, the CORSAIR RM1200x SHIFT is the superior option despite its higher price of £174.98. It is ideal for high-performance or future-proof PC builds where efficiency, cable management, and reliability are paramount. Conversely, if you are building a mid-range system on a tighter budget and do not need more than 750 watts or modular cabling, the Gigabyte P750BS at £65.01 offers a solid, simple solution with essential safety features and decent efficiency. Ultimately, the CORSAIR targets enthusiasts and demanding users, while the Gigabyte serves cost-conscious buyers with basic power needs.