This article covers MSI MPG A1250GS PCIE 5.1 ATX 3.1 ゲーム用電源.

Overview

The MSI MPG A1250GS PCIE 5.1 ATX 3.1 is a 1250W, 80 Plus Gold certified fully modular power supply that targets enthusiasts building high-end gaming rigs or workstations. It supports the latest ATX 3.1 and PCIe 5.1 standards, featuring dual 12V-2x6 connectors to handle the transient power spikes of modern GPUs. Inside, it uses 100% Japanese 105°C-rated capacitors for long-term reliability, and comes with a 10-year warranty for peace of mind.

Compatibility Guide

This PSU uses the standard ATX form factor, so it fits in most mid-tower and full-tower cases. The connector set includes: 24-pin ATX, dual 4+4-pin EPS12V for CPU, multiple PCIe 6+2-pin connectors, and two native 12V-2x6 connectors. It can power two high-end GPUs like RTX 5090 or Radeon RX 9070 XT simultaneously. However, the physical length is approximately 190mm, so ensure your case has at least 200mm of clearance for the PSU bay.

Product Info

The MSI MPG A1250GS was released in 2025 and sits in the mid-high to high-end PSU range. It achieves up to 90% efficiency at 50% load (80 Plus Gold). Protection features include OCP, OTP, OPP, SCP, OVP, UVP, SIP, and NLO. The 10-year warranty is a strong indicator of build quality.

Best Use Cases

High-end gaming PC builder: Perfect for an RTX 5090 or dual RTX 5080 setup. The dual 12V-2x6 connectors future-proof the system for the next GPU generation. Workstation with dual GPUs: 3D rendering, machine learning, or video editing rigs that use two high-power GPUs will benefit from the 1250W capacity and dual connectors. Long-term system owner: If you want to keep your PC for 7-10 years without replacing the PSU, the 10-year warranty and Japanese capacitors make this a solid choice. Value-conscious high-wattage buyer: Those who need 1250W but don't want to pay extra for Platinum or Titanium efficiency can rely on the Gold-rated MPG A1250GS. ## Alternatives
Direct competitors include the Corsair RM1200x Shift (1200W, Gold, ATX 3.1) and Seasonic Focus GX-1200 (1200W, Gold). The Corsair's side-cable design simplifies routing but may not fit all cases. The Seasonic is a proven performer but only has a single 12V-2x6 connector. The MSI MPG A1250GS stands out with its dual 12V-2x6 connectors, making it the better choice for dual-GPU setups.

Things to Consider

This PSU is overkill for single-GPU mid-range builds (e.g., RTX 4070 or RX 7800 XT). A 750W or 850W unit would be more cost-effective. Also, while it supports ATX 3.1, older motherboards and GPUs will use standard PCIe cables, which are included. The large number of cables may require careful cable management in smaller cases. ## FAQ Q: Is this PSU compatible with ATX 3.0 systems? A: Yes, ATX 3.1 is fully backward compatible with ATX 3.0. The 12V-2x6 connector is physically compatible with 12VHPWR. Q: Can I use both 12V-2x6 connectors for a single GPU? A: No, each GPU typically uses one connector. Using both on one card is not recommended and may cause issues. Q: What is the fan size and noise level? A: Official specs are not fully detailed, but the fan is likely a 135mm or 140mm fluid dynamic bearing model, with a semi-passive mode for low loads. For exact noise figures, refer to MSI's official page.

Product Disclosure (Amazon)

  • Manufacturer: MSI
  • Seller: Amazon US
  • Fulfilled by: Amazon US
  • ASIN: B0DT2Q53TH
  • Note: This article covers a manufacturer-made product based on Amazon listing details.