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MSI MAG A750GLS PCIE5, Fully Modular Compact vs Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &

Updated August 2026 — MSI MAG A750GLS PCIE5, Fully Modular Compact leads on modularity and efficiency.

The MSI MAG A750GLS offers superior efficiency and features compared to the Thermaltake Smart BM3, making it a better choice for serious gamers. However, the Thermaltake is a solid budget option.

Why MSI MAG A750GLS PCIE5, Fully Modular Compact is better

Efficiency

MSI has 80 PLUS Gold certification.

Modularity

MSI is fully modular.

Warranty

MSI offers a 10-year warranty.

Why Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 & is better

Price

Thermaltake is $75.99, cheaper than MSI.

Fan Function

Thermaltake has Smart Zero Fan function.

Capacitor Quality

Thermaltake uses high-quality Japanese capacitors.

Overall score

MSI MAG A750GLS PCIE5, Fully Modular Compact
88
Thermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &
75

Specifications

SpecMSI MAG A750GLS PCIE5, Fully Modular CompactThermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &
Efficiency80 PLUS Gold80 PLUS Bronze
ModularityFully ModularSemi-Modular
Power Output750W750W
Cooling Fan135mm FDB120mm FDB
Connector TypeNative 12V-2x6PCIe Gen 5

Dimension comparison

MSI MAG A750GLS PCIE5, Fully Modular CompactThermaltake Smart BM3 750W 80Plus Bronze ATX 3.1 &

Introduction to the Power Supply Showdown

In the world of PC gaming and high-performance computing, choosing the right power supply unit (PSU) is critical. This comparison focuses on two popular options: the MSI MAG A750GLS PCIE5 and the Thermaltake Smart BM3 750W. Both power supplies cater to gamers and professionals alike, but they differ significantly in features and price.

Price Comparison

The MSI MAG A750GLS is priced at $89.99, while the Thermaltake Smart BM3 is more budget-friendly at $75.99. This places the Thermaltake option at about 17% cheaper than the MSI model. While the lower price of the Smart BM3 may appeal to value-oriented users, it’s essential to consider whether the additional features and certifications of the MSI justify its higher cost.

Certification and Efficiency Ratings

When it comes to efficiency, the MSI MAG A750GLS boasts an 80 PLUS Gold certification, meaning it can achieve up to 90% efficiency under optimal conditions. In contrast, the Thermaltake Smart BM3 carries an 80 PLUS Bronze certification, which allows for slightly lower efficiency levels. This distinction is crucial for users looking to minimize energy consumption and reduce electricity costs over time, making the MSI a more appealing option for those prioritizing efficiency.

Modular Design

The MSI MAG A750GLS features a fully modular design, allowing users to connect only the cables they need, which enhances cable management and airflow within the case. On the other hand, the Thermaltake Smart BM3 is semi-modular, meaning some cables are fixed. This could lead to a cluttered build if not managed properly. The fully modular design of the MSI gives it an edge for builders seeking a tidy and efficient setup.

Connector Compatibility

Both power supplies are equipped to handle next-generation hardware, featuring support for ATX 3.1 and PCIe 5.1 standards. However, the MSI MAG A750GLS has native 12V-2x6 PCIe connectors, which are specifically designed to deliver up to 600W to support high-performance GPUs. The Thermaltake Smart BM3 also includes a PCIe Gen 5 connector, but its overall power delivery may not match the MSI’s performance potential when handling demanding graphics cards.

Cooling Solutions

Cooling is another area where the MSI MAG A750GLS shines. It uses a 135 mm fluid-dynamic bearing fan, designed to maintain low noise levels while ensuring effective cooling. The average sound level is comparable to a peaceful night, making it an excellent choice for quiet builds. The Thermaltake Smart BM3 utilizes a 120mm fluid dynamic bearing fan, equipped with a Smart Zero Fan function that prevents the fan from spinning until the load exceeds 20%. While this feature helps minimize noise at low loads, the MSI's fan design may provide better cooling under heavy use.

Build Quality and Durability

The MSI MAG A750GLS is built with an LLC half-bridge design and features advanced protection mechanisms such as OCP, OTP, OPP, SCP, OVP, UVP, and SIP. This robust construction promises reliability and durability. Meanwhile, the Thermaltake Smart BM3 is equipped with high-quality Japanese capacitors rated for 105°C (221°F), enhancing its longevity. Both units offer reliable performance, but the comprehensive protection features of the MSI may appeal more to enthusiasts looking for peace of mind during intense gaming sessions.

Warranty and Customer Support

In terms of warranty, the MSI MAG A750GLS comes with a generous 10-year warranty, reflecting the brand's confidence in its product longevity and reliability. The Thermaltake Smart BM3 offers a 5-year warranty, which is still commendable but not as extensive as MSI’s. For users concerned about the long-term performance of their power supply, the longer warranty period of the MSI can be a significant factor in their purchasing decision.

Which should you buy?

In summary, the choice between the MSI MAG A750GLS and the Thermaltake Smart BM3 ultimately depends on your specific needs and budget. If you prioritize efficiency, modular design, and comprehensive protection features, the MSI MAG A750GLS is worth the extra investment at $89.99. However, if you're looking for a more budget-friendly option that still meets modern standards, the Thermaltake Smart BM3 at $75.99 provides solid performance without breaking the bank.