MSI
MSI MAG A1250GL PCIE5 power supply
A 1250 W ATX 3.1 power supply with 80 PLUS Gold efficiency, a 135 mm fluid dynamic bearing fan, fully modular cabling and a native 12V-2x6 PCIe 5.1 connector for 600 W GPU support
- TypeATX 12V
- Maximum Power1250 W
- ModularNo
- Fans1 x 135 mm Fluid Dynamic Bearing
- PFCActive
- Main Connector20+4 Pin
Type ATX 3.1 (1250W)
- 80 PLUS Gold certified for up to 90 percent efficiency
- ATX 3.1 ready handles up to 2x power excursions
- PCIe 5.1 native 16-pin connector delivers 600W to GPU
- Fully modular design uses only needed cables for better airflow
- Compact 150 mm ATX frame fits space-efficient builds
1250 W ATX 3.1 power supply
The MSI MAG A1250GL PCIE5 delivers 1250 W of continuous power for high-end desktop builds. It meets the ATX 3.1 and PCIe 5.1 specifications and carries 80 PLUS Gold certification for up to 90% efficiency. A fully modular cable set lets you connect only the leads your system requires. The unit fits a compact 150 mm chassis depth.
Thermals noise and power draw
A single 135 mm fluid dynamic bearing fan handles cooling while the Gold-rated topology keeps waste heat low at typical loads. Active PFC corrects the power factor across the 100–240 V input range for stable draw. The dual +12 V rail design distributes current cleanly to the motherboard and graphics connectors. Efficiency above 85% reduces the thermal load inside the case during everyday use.
Sustained load behavior
Under prolonged demand the full-bridge LLC DC-to-DC conversion maintains tight regulation on the +12 V, 5 V and 3.3 V rails. The native 12V-2x6 connector can supply up to 600 W to a PCIe 5.1 graphics card without adapter cables. Protection circuits guard against over-voltage, over-current and short-circuit events during extended sessions. The 10-year manufacturer warranty period reflects the expected service life.
Highlights
- 80 PLUS Gold certified for up to 90 percent efficiency
- ATX 3.1 ready handles up to 2x power excursions
- PCIe 5.1 native 16-pin connector delivers 600W to GPU
- Fully modular design uses only needed cables for better airflow
- Compact 150 mm ATX frame fits space-efficient builds
Specifications
| Brand | MSI |
|---|---|
| Model | MAG A1250GL PCIE5 |
| Series | RMx Series |
| Type | ATX 12V |
| Maximum Power | 1250 W |
| Modular | No |
| Fans | 1 x 135 mm Fluid Dynamic Bearing |
| PFC | Active |
| Main Connector | 20+4 Pin |
| +12V Rails | 2 |
| SATA Power Connector | 16 |
| Efficiency | > 85% |
| Energy-Efficient | 80 PLUS GOLD Certified |
| Input Voltage | 100 - 240 V |
| Input Frequency Range | 50/60 Hz |
| Input Current | 10A @ 115V, 5A @ 230V |
| Output | +5V@22A, +3.3V@22A, [email protected] , [email protected] , +5VSB@3A |
| Connectors | 1 x ATX (24 PIN) 2 x EPS (4+4 PIN) 1x PCI-E 5.1 (16 PIN) 4 x PCI-E (6+2 PIN) 12 x SATA (15 PIN) 4 x MOLEX (4 PIN) 1 x Molex to FDD Adapter |
| Color | Black |
| Max PSU Length | 150 mm |
| Protection | OCP / OVP / OPP / OTP / SCP / UVP |
| Cable Spec | 20_plus_4_pin_atx, 1, ATX |
| Peak Power | 1250 watts |
| SLI | Certified |
| Approvals | not_applicable |
| Size/Dimensions | 11.5 in x 9.25 in x 5 in |
| Dimensions | 20' |
| Weight | 3.502 kilograms |
| Package Content | MAGA1250GLPCIE5, 1, false |
| Frequency Range | 50/60 Hz |
| +3.3V Max. Current | 8A |
| +12V1 Max. Current | 9A |
| +12V2 Max. Current | 10A |
| +12V3 Max. Current | 30A |
| +12V4 Max. Current | 28A |
| +12V5 Max. Current | 29A |
| +12V6 Max. Current | 28A |
| +5VSB Max. Current | 5A |
| 12V Power Connector | 1 x 4 Pin ATX 12V |
| Floppy Connector | 1 |
| Peripheral Connector | 1 |
| Fans Total Quantity | 1 |
| Top Fans LED | Blue |
| Top Fans Noise Level | Air |
| Rear Fans LED | Blue |
| Features | Full Modular, full, Air, ATX, 10 Year Limited Manufacturer, MAG A1250GL PCIE5 |
| Shipping weight | 3.49 kg |
| Package size | 305 × 241 × 127 mm |
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Questions about this item
Will the 150 mm length fit my compact ATX case?
The unit measures 150 mm long, so it fits most mid-tower and many compact ATX cases; check your case clearance before ordering.
Can the native 12V-2x6 connector deliver 600 W to my PCIe 5.1 graphics card?
Yes, the included 16-pin cable is rated for 600 W, meeting the PCIe 5.1 GPU power excursion requirement.
Do I need extra cables for a build with multiple drives and two EPS motherboard connectors?
The box supplies 12 SATA, 4 MOLEX, 2 EPS (4+4 PIN) and 4 PCI-E (6+2 PIN) cables, covering most high-end builds without extras.
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