Does the MSI|MPG A1250GS PCIE5 R power supply support the new ATX 3.1 and PCIe 5.1 standards?

Yes, the MSI MPG A1250GS PCIE5 power supply is ATX 3.1 and PCIe 5.1 ready.

Is the MSI|MPG A1250GS PCIE5 R power supply compatible with a 5090 and 9950X3D rig?

The MSI MPG A1250GS PSU is highly praised for its substantial power capacity, making it an excellent choice for high-end GPU setups, including next-gen NVIDIA 50 series cards.

Is the 80+ Gold certification indicative of a particular energy efficiency level, and what does this mean for power consumption under load?

80 PLUS Gold certification indicates that the power supply is capable of achieving up to 90% efficiency under load. This means that it can convert a significant portion of the electrical power drawn from the wall into usable power for the computer, minimizing energy waste and reducing overall power consumption.

Can the dual 12V-2x6 cables support dual GPU setups, and are there any additional cables included for other components?

The dual-native 12V-2x6 connectors can deliver up to 600W of power per connector, making it suitable for supporting high-end GPU setups, including dual GPU configurations.

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Main image of MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

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Alt view image 9 of 14 - MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

Alt view image 10 of 14 - MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

Alt view image 11 of 14 - MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

Alt view image 12 of 14 - MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

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MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

Name: MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty
Uploaded: 2025-11-08
Description: MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

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Options: ATX 3.1 (1250W) Dual 12V-2x6

ATX 3.1 (1000W)
ATX 3.1 (1000W) Dual 12V-2x6
ATX 3.1 (1250W) Dual 12V-2x6
ATX 3.1 (1300W)
ATX 3.1 (1600W) Dual 12V-2x6
ATX 3.1 (850W)
ATX 3.1 (850W) Dual 12V-2x6

80 PLUS GOLD CERTIFIED –With 80 PLUS Gold certification (up to 90% efficiency)
DUAL-NATIVE 12V-2x6 CONNECTORS - Equipped with dual-native 12V-2x6 PCIe connectors, it can deliver up to 600W of power per connector to support PCIe 5.1 GPUs.
DURABLE DESIGN - This power supply is equipped with a 135 mm Fluid-dynamic bearing (FDB) fan, designed to enhance durability.
The embossed jacket modular cables with premium copper alloy connectors to ensure reliable performance.
LOW-NOISE OPERATION - The average sound level is maintained as low as that of a peaceful night, and it also features a Zero Fan Mode for an even quieter operation.
COMPACT SIZE - A compact 150 mm-long and 150 mm-wide ATX form factor ensures a comfortable and easy fit in most PC cases. This frees up more space for cable management and airflow to the rest of the system.

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

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Learn more about the MSI MPG A1250GS PCIE5


Best Seller Ranking	#63 in Power Supplies

General
Brand	MSI
Model	MPG A1250GS PCIE5

Details
Color	Black
Type	ATX12V
Maximum Power	1250 W
Fans	1 x 135 mm
PFC	Active
+12V Rails	2
SATA Power Connector	8
Max PSU Length	150 mm
Modular	Full Modular
Energy-Efficient	Up to 92%
Protection	OVP/ OCP/ OTP/ OPP/ SCP/ UVP
Input Voltage	100 - 240 V
Input Frequency Range	50/60 Hz

Additional Information
First Listed on Newegg	March 05, 2025

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 10 years
Limited Warranty period (labor): 10 years
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We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2025 and December 31, 2025 you will have until January 31, 2026 to return your product.

Return for refund until: January 31, 2026

Return for replacement until: January 31, 2026

This item is covered by Newegg.com's Extended Holiday Return Policy. Read full return policy for details.

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MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

Learn more about the MSI MPG A1250GS PCIE5

Customer Reviews of the MSI MPG A1250GS PCIE5

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Warranty, Returns, And Additional Information

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Item#: N82E16817701029

Best Sellers

MSI MPG A1250GS PCIE5, Fully Modular Gaming 1250W Power Supply, 80+ Gold, Dual 12V-2x6 Cables, Server-grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 10 Year Warranty

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Learn more about the MSI MPG A1250GS PCIE5

Customer Reviews of the MSI MPG A1250GS PCIE5

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info