MPG A1250GS PCIE5 Featuring ATX 3.1 and PCIe 5.1 support with two 12V-2x6 connectors, these PSUs are built to handle NVIDIA’s 50 series graphics cards and AI PCs with ease. Advanced thermal solutions ensure cool, stable, and efficient operation, even under heavy loads, giving you the reliability and durability you need for gaming, streaming, or AI-powered tasks.
Q: What type of cooling system does the power supply use?
A: This power supply uses an air cooling system with a Fluid Dynamic Bearing fan.
Q: Is this power supply fully modular?
A: Yes, it is a fully modular power supply.
Q: How does the efficiency of the power supply affect my system?
A: The efficiency of your power supply directly influences your system's performance and your power consumption.
Q: Does this power supply have overload protection?
A: Yes, this power supply includes overload protection.
Q: What is the benefit of using flat cables in this power supply?
A: The flat cables make cable management easier and less of a headache, allowing for a more organized system and better airflow.
Q: Is this power supply compatible with ATX 3.1?
A: Yes, this power supply is ATX 3.1 compatible.
Q: What is the wattage of this power supply?
A: This power supply has a wattage of 1250 watts.

MPG A1250GS PCIE5 Featuring ATX 3.1 and PCIe 5.1 support with two 12V-2x6 connectors, these PSUs are built to handle NVIDIA’s 50 series graphics cards and AI PCs with ease. Advanced thermal solutions ensure cool, stable, and efficient operation, even under heavy loads, giving you the reliability and durability you need for gaming, streaming, or AI-powered tasks.

CORSAIR RMx SHIFT Series fully modular power supplies boast a revolutionary side cable interface to keep all your connections within quick reach, for exceptionally convenient 80 PLUS Gold efficient power. With fully modular micro-fit connections and ATX 3.0 compliance, RMx SHIFT makes clean PC builds and upgrades even easier. RMx SHIFT PSUs use Japanese 105°C-rated electrolytic capacitors, for long life and reliability backed by a ten-year warranty. A 140mm fluid dynamic bearing fan utilizes a specially calculated fan curve for high performance and reliability with low noise, while Zero RPM mode support ensures virtually silent operation at low and medium loads. For quiet, efficient, and accessible power, put an RMx SHIFT Series PSU on your side.

MPG A1000GS PCIE5 Featuring ATX 3.1 and PCIe 5.1 support with two 12V-2x6 connectors, these PSUs are built to handle NVIDIA’s 50 series graphics cards and AI PCs with ease. Advanced thermal solutions ensure cool, stable, and efficient operation, even under heavy loads, giving you the reliability and durability you need for gaming, streaming, or AI-powered tasks.

The MAG gaming power supply is equipped to support the latest NVIDIA GeForce RTX 4000 Series and AMD GPUs. The efficiency of your power supply can make a world of a difference; it's why we offer a reliable 80+ Gold power proficiency PSU and a 10-year limited warranty guaranteeing a long term reliable solution for your gaming system. Organizing cables is often the most bothersome part of building a PC. With the MPG gaming power supply's fully modular design, we've given you the option of what cables you'll need for your system and defeat the clutter. With that in mind we've gone with a flat black design to further help you create the most beautiful cable managed pc system around. The remaining cables can be nicely stored away in the included cable bag. The MAG gaming power supply comes in 160mm and 150mm wide dimensions to ensure a comfortable fit in more pc chassis so it can continue to maintain a comfortable space for your cable management needs.
| Pros for MSI - MPG A1250GS PCIE5 1250W ATX 3.1 & PCIe 5.1 Ready Full Modular 80 Plus Gold Gaming Power Supply - Black | |||
|---|---|---|---|
| There were no pros for this product— | Cable Management, Noise Level, Overall Performance, Power Supply, Ease of use | There were no pros for this product— | Overall Performance, Noise Level, Cable Management, Installation Ease, Power Capacity |
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
I've been using the MSI A1250GS power supply in my newly built desktop for a few months now, and it's been rock solid. Super powerful and very stable, even under heavy loads. No issues at all—quiet performance and clean cable design make it a great choice for any high-end build. Definitely recommend it if you're looking for a reliable PSU.
Posted by Phil
Awesome psu, especially if you own a 4090/5090. The cables are high quality and I don’t feel like I have to worry about any problems running such a high end gpu with these. It cost a little more but I highly recommend this psu if you need it.
Posted by Psu1
Well working model, and itvwas perfect for my build. The folks at best buy were able to work with me too, which was very considerate.
Posted by TylerC