MSI MAG A750GLS PCIE5, Fully Modular Compact vs Seasonic PRIME PX 1600W Power Supply ATX 3.1 PCIe
Updated August 2026 — MSI MAG A750GLS PCIE5, Fully Modular Compact wins on size, Seasonic PRIME PX 1600W Power Supply ATX 3.1 PCIe wins on warranty and cooling.
The MSI MAG A750GLS is a budget-friendly option for gamers, while the Seasonic PRIME PX is a premium choice for high-performance needs.
Why MSI MAG A750GLS PCIE5, Fully Modular Compact is better
Price
MSI is significantly cheaper at $89.99.
Efficiency
MSI has 80 PLUS Gold certification.
Size
MSI is more compact at 150 mm.
Why Seasonic PRIME PX 1600W Power Supply ATX 3.1 PCIe is better
Power Output
Seasonic offers 1600W compared to MSI's 750W.
Warranty
Seasonic has a 12-year warranty versus MSI's 10 years.
Build Quality
Seasonic uses 100% Japanese capacitors.
Overall score
Specifications
| Spec | MSI MAG A750GLS PCIE5, Fully Modular Compact | Seasonic PRIME PX 1600W Power Supply ATX 3.1 PCIe |
|---|---|---|
| Modular | Fully | Fully |
| Certification | 80 PLUS Gold | 80 PLUS Platinum |
| Fan Size | 135 mm | 135 mm |
| Connector Type | 12V-2x6 | 12V-2x6 |
| Cooling Type | Fluid-dynamic | Hybrid |
Dimension comparison
Price Comparison
The MSI MAG A750GLS is significantly cheaper than the Seasonic PRIME PX 1600W, with a price difference of about $358.59. The MSI MAG A750GLS is priced at $89.99, while the Seasonic PRIME PX comes in at $448.58. This marks a staggering 399% price increase for the Seasonic unit, making the MSI option a more budget-friendly choice for gamers and PC builders who don't require the higher wattage.
Power Output and Efficiency
When it comes to power output, the Seasonic PRIME PX offers a substantial advantage with 1600W compared to the 750W of the MSI MAG A750GLS. This allows the Seasonic unit to cater to high-demand systems, such as AI workstations and setups with multiple high-performance graphics cards. However, the MSI MAG A750GLS still boasts an impressive 80 PLUS Gold certification, achieving up to 90% efficiency, which is suitable for most gaming needs and offers a solid performance at a lower wattage.
Modular Design
Both power supplies feature a fully modular design, allowing users to connect only the cables they need for their systems. This design not only simplifies cable management but also enhances airflow within the case. The MSI MAG A750GLS has low-noise operation with a 135 mm Fluid-dynamic bearing fan, while the Seasonic PRIME PX employs hybrid fan control with a similar fan size, ensuring effective cooling during operation. This modularity is essential for users looking to optimize their builds.
Build Quality and Reliability
In terms of build quality, the Seasonic PRIME PX stands out with its use of 100% Japanese capacitors, which are known for their longevity and reliability. It also offers a 12-year warranty, compared to the 10-year warranty of the MSI MAG A750GLS. While the MSI unit has robust protections against various electrical issues, the overall trustworthiness of the Seasonic's components and extended warranty may appeal to users looking for long-term reliability in high-performance setups.
Compatibility with Modern Hardware
Both power supplies are designed to be ATX 3.1 and PCIe 5.1 ready, featuring native 12V-2x6 connectors. This means they can support the latest graphics cards, including NVIDIA's 50 series and AMD's RX 9000 series. However, the higher wattage of the Seasonic PRIME PX makes it more suited for extreme builds that involve multiple GPUs or power-hungry components, while the MSI MAG A750GLS is ideal for mainstream gaming systems.
Cooling and Noise Levels
Cooling performance is a highlight for both models, with each incorporating a 135 mm fan designed for quiet operation. The MSI MAG A750GLS maintains a sound level comparable to a peaceful night, which is an appealing feature for gamers who prefer a quieter environment during gameplay. The Seasonic PRIME PX's hybrid fan control also adapts its cooling needs based on load, which can lead to quieter operation under lower loads, ensuring a good balance between performance and noise.
User Experience and Customer Feedback
Both products are well-regarded in the market, but their target audiences differ significantly. The MSI MAG A750GLS is aimed at gamers and PC builders looking for a reliable, efficient power supply at a reasonable price, while the Seasonic PRIME PX targets enthusiasts and professionals needing maximum power and longevity. Customer feedback often highlights the MSI's balance of performance and cost-effectiveness, whereas the Seasonic is praised for its premium build and reliability for high-end applications.
Which should you buy?
Choosing between the MSI MAG A750GLS and the Seasonic PRIME PX ultimately boils down to your specific needs. If you're building a mainstream gaming PC and are looking for a cost-effective solution, the MSI MAG A750GLS at $89.99 is an excellent choice with its solid performance and efficiency. On the other hand, if you're in need of a powerhouse for an AI workstation or a multi-GPU setup, the Seasonic PRIME PX, despite its higher price of $448.58, offers the wattage and reliability needed for demanding applications.

