JUSTOP Black ATX 500W PSU vs SAMA G850 Power Supply - 850W Fully Modular 80 Plus Gold Certified ATX 3.1 & PCI

Pricing Comparison

The JUSTOP Black ATX 500W PSU is considerably more affordable at £22.50 compared to the SAMA G850 Power Supply, which retails for £84.99. This significant difference in price reflects the varying features and target audiences of each power supply. The JUSTOP model offers basic functionality suitable for home and office PCs, making it an attractive choice for budget-conscious users. Conversely, the SAMA G850, with its advanced specifications, targets high-performance gaming and workstation setups, justifying its higher price point.

Power Output

When it comes to power output, the SAMA G850 takes the lead with an impressive 850W capacity, compared to JUSTOP's 500W. This higher wattage means the SAMA model can support more demanding components, especially high-end graphics cards such as the NVIDIA GeForce RTX 50 and 40 series. The capability to deliver stable power for resource-intensive tasks makes the SAMA G850 a better fit for gamers and professionals who require robust performance. In contrast, the JUSTOP PSU is more suited for everyday computing tasks, where 500W is often sufficient.

Efficiency Ratings

The SAMA G850 boasts an 80 Plus Gold certification, achieving up to 91.15% efficiency at typical loads. This high efficiency not only reduces power waste but also minimises heat generation, which is crucial in high-performance systems. In comparison, the JUSTOP PSU does not specify an efficiency rating, which could indicate lower efficiency in its operation. For users looking to optimise energy consumption and performance, the SAMA G850 is clearly the superior option, offering platinum-level performance in efficiency.

Modular Design

One of the standout features of the SAMA G850 is its fully modular cable design, allowing users to only connect the cables they need. This design enhances airflow, improves cable management, and contributes to a neater build aesthetic, which is particularly important in high-end gaming and workstation environments. On the other hand, the JUSTOP PSU is fully wired, meaning all cables are permanently attached. While this may simplify installation for some users, it can lead to clutter and reduced airflow within the case, making the SAMA G850 a more appealing choice for those who prioritise a clean build.

Cooling Systems

The cooling systems of both power supplies differ significantly in design and performance. The JUSTOP Black ATX 500W PSU features a 120mm ultra-quiet fan, which is sufficient for basic cooling needs. However, the SAMA G850 is equipped with a 140mm ECO fan with Fluid Dynamic Bearing technology, which not only provides efficient cooling but also operates quietly and reduces vibrations. This advanced cooling system is particularly beneficial for high-performance setups, ensuring stable operation under load. Users seeking a power supply that excels in thermal management will find the SAMA G850 to be the preferred option.

Compatibility and Connectors

In terms of compatibility, the JUSTOP PSU has a variety of connectors, including a 20+4 pin, 4+4 pin for CPU, and multiple SATA and Molex connectors, making it versatile for various desktop configurations. The SAMA G850, while also compatible with standard ATX systems, includes a native 12V-2x6 connector specifically designed for the latest NVIDIA graphics cards, ensuring it meets the demands of cutting-edge hardware. This feature highlights the SAMA G850's focus on future-proofing and compatibility with high-end components, making it more suitable for gamers and professionals looking to build advanced systems.

Safety Features

Safety is a critical consideration in power supply design, and both models offer essential protective features. The JUSTOP PSU includes over voltage protection, over power protection, short circuit protection, and thermal overload cut-off, which are standard for ensuring safety during operation. The SAMA G850 enhances this safety profile with a comprehensive range of protections, including Over Voltage Protection (OVP), Over Current Protection (OCP), Over Temperature Protection (OTP), Over Power Protection (OPP), Short Circuit Protection (SCP), Under Voltage Protection (UVP), and Surge Impact Protection (SIP). This extensive array of safety features in the SAMA G850 makes it a more reliable choice for high-stakes computing environments.

Which should you buy?

Choosing between the JUSTOP Black ATX 500W PSU and the SAMA G850 Power Supply ultimately depends on your specific needs and budget. If you are seeking a cost-effective solution for everyday computing tasks, the JUSTOP PSU offers decent functionality at an attractive price point of £22.50. However, for gamers and professionals requiring advanced capabilities and efficiency, the SAMA G850 at £84.99 stands out with its higher wattage, 80 Plus Gold efficiency, fully modular design, superior cooling, and extensive safety features. In summary, the SAMA G850 is the clear choice for those looking to invest in a power supply that supports high-performance systems, while the JUSTOP PSU remains a solid option for basic computing needs.