This article covers MSI MAG A750BN PCIE5 III PC電源ユニット 750W ATX3.1.

Overview

The MSI MAG A750BN PCIE5 III is a 750W ATX power supply unit with 80 PLUS Bronze certification. It supports ATX 3.1 and PCIe 5.1 standards, making it compatible with the latest graphics cards. Equipped with a 120mm hydraulic bearing fan, it balances quiet operation and cooling. The DC-to-DC design ensures stable long-term performance. This unit is an excellent choice for entry-level to mid-range gaming builds, especially for budget-conscious builders who want modern connector support.

Compatibility Guide

The PSU uses the standard ATX form factor, fitting most ATX cases. It includes two EPS 8(4+4)-pin connectors for CPU power, covering entry-level to mainstream motherboards. A single PCIe 5.1 16-pin connector (450W) allows direct connection to modern GPUs like the RTX 40 series. Three PCIe 8(6+2)-pin connectors support older graphics cards. Additionally, there are three SATA and two peripheral connectors for storage and accessories. Note that it is non-modular, so cable management requires some planning. If you are using a compact case, check the available space for excess cables.

Product Info

Released around 2023, the MSI MAG A750BN PCIE5 III sits in the entry-to-mid-range market segment. Its key selling point is offering ATX 3.1/PCIe 5.1 support at a budget-friendly price, typically around ¥7,292 on Japanese online retailers. It carries a 5-year warranty. With 750W output, it comfortably powers mid-range gaming PCs. Competitors like the Corsair CX750 and Thermaltake Smart BM3 offer similar specs, but the MSI unit stands out with ATX 3.1 support at this price point.

Best Use Cases

  • First-time PC builders on a budget: The non-modular design simplifies cable selection, and the price is very accessible. It's a safe choice for beginners who don't want to worry about choosing the right cables.
  • Gamers using mid-range GPUs like the RTX 4060 or RX 7600: ATX 3.1 support future-proofs for upgrades. 750W provides ample headroom for these cards and allows for some overclocking.
  • Users who want modern standards without spending a lot: If you need PCIe 5.1 and ATX 3.1 but don't want to pay a premium for Gold or Platinum efficiency, this is an ideal pick.
  • Not recommended for: Enthusiasts who prefer fully modular units for clean cable management, or those building with high-end GPUs (RTX 4080+), where 750W may be insufficient and cable clutter becomes an issue.

Things to Consider

The non-modular cable design means all cables are permanently attached, which can clutter small cases. For clean builds, a semi-modular or fully modular unit is better. The 750W capacity is adequate for RTX 4070 Ti SUPER class GPUs, but for RTX 4080 SUPER or above, a higher wattage unit is recommended. The 80 PLUS Bronze efficiency is lower than Gold, so electricity costs may be slightly higher under sustained heavy loads. Protection features include OCP, OVP, SCP, OPP, and UVP, which cover most scenarios. However, some reviews note that the overcurrent protection threshold is set relatively high, so extreme overclocking may not be ideal.

FAQ

Q: Can I use this with an RTX 4070 Ti SUPER?
A: Yes, 750W and the 12VHPWR connector are sufficient, though the headroom is modest. For peace of mind, consider an 850W unit.
Q: How quiet is it?
A: The 120mm hydraulic bearing fan is quiet under normal loads; noise is not an issue even under heavy load. If you require absolute silence, look for a fanless or semi-passive model.
Q: Is the 5-year warranty enough?
A: It's standard for this class. If you plan to keep the PSU for a decade, consider units with longer warranties (e.g., 10 years) from brands like Seasonic or Corsair.

Product Disclosure (Amazon)

  • Manufacturer: MSI
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • ASIN: B096Y3WD5C
  • Note: This article covers a manufacturer-made product based on Amazon listing details.