Cooler Master MWE Gold Series
Cooler Master MWE Gold 1250 V2 ATX 3.1 1250W Power Supply
High-capacity power for demanding gaming PCs and performance workstations. The Cooler Master MWE Gold 1250 V2 combines 1250W output, 80 PLUS Gold efficiency, fully modular cabling and a native 12V-2x6 graphics card power connection.
Cooler Master MWE Gold 1250 V2 – Key Highlights
Rated Output
1250W
High-capacity power delivery
Efficiency
80 PLUS Gold
At least 90% at specified typical-load conditions
GPU Power
12V-2x6
Native high-power graphics connector
Cooling
140mm Fan
Two-ball-bearing fan design
Introduction to the Cooler Master MWE Gold 1250 V2 ATX 3.1
The Cooler Master MWE Gold 1250 V2 ATX 3.1 is a 1250W fully modular power supply designed for demanding desktop configurations. Its 80 PLUS Gold certification, active power factor correction and high-capacity +12V output make it suitable for compatible high-performance gaming PCs, enthusiast systems and workstation builds.
Designed around the ATX 3.1 specification, this model includes a native 12V-2x6 graphics card power connector rated for up to 600W. It also provides three PCIe 6+2-pin connectors, allowing flexibility for compatible graphics cards and system configurations. Always follow the GPU manufacturer's connector and power requirements.
The fully modular design lets builders connect only the cables they need, helping reduce cable clutter and simplify installation. A 140mm fan, Japanese capacitors and a 10-year manufacturer warranty round out its feature set.
Key Features of the Cooler Master MWE Gold 1250 V2
1250W High-Capacity Output
Provides up to 1250W of rated power for compatible high-performance systems. Check the combined CPU, GPU and peripheral power requirements when planning a build.
80 PLUS Gold Efficiency
Gold-rated power conversion helps reduce wasted energy as heat under specified testing conditions. Actual efficiency varies with load and input conditions.
ATX 3.1 and Native 12V-2x6
Supports the ATX 3.1 power-supply specification and provides a native 12V-2x6 connector for compatible modern graphics cards, with up to 600W available through that connection.
Fully Modular Flat Cables
Connect only the cables required for your build. The modular design helps with cable routing, maintenance and a cleaner-looking PC interior.
140mm Cooling Fan
The 140mm two-ball-bearing fan provides airflow for cooling the power supply. Actual fan noise depends on load, ambient temperature and system conditions.
Japanese Capacitors and Protection
The design uses Japanese capacitors and lists protection against over-voltage, over-power, short circuits, over-current, under-voltage and over-temperature conditions, plus inrush protection.
ATX 3.1, Efficiency and Power Delivery
The MWE Gold 1250 V2 ATX 3.1 uses active PFC and is rated for 80 PLUS Gold efficiency. Its published specifications indicate at least 90% efficiency at typical load under the applicable conditions. Efficiency certification describes power-conversion performance, not the total power a PC will draw from the wall.
The +12V rail is rated at 104A, equivalent to 1248W. The native 12V-2x6 connection supports up to 600W for compatible graphics cards, while three PCIe 6+2-pin connectors provide additional options for supported GPUs. Use only the supplied cables intended for this exact PSU model.
The PSU is specified for an operating temperature range of 0–50°C, a hold-up time of at least 16ms at full load and an MTBF exceeding 100,000 hours. These are manufacturer-listed design figures, not a guarantee of a particular service life in every environment.
This SKU is the ATX 3.1 version. It should not be confused with earlier MWE Gold 1250 V2 ATX 3.0 variants that use different model-code suffixes and may list the previous 12VHPWR connector designation.
Cooler Master MWE Gold 1250 V2 Technical Specifications
Product Name
Cooler Master MWE Gold 1250 V2 ATX 3.1
Model Number
MPE-C501-AFCAG-3EIN
Rated Output
1250W
ATX Version
ATX 3.1
Efficiency Certification
80 PLUS Gold
Power Factor Correction
Active PFC
Input Voltage
100–240V AC
Input Current
15–7A
Input Frequency
50–60Hz
Dimensions (L × W × H)
180 × 150 × 86mm
Cooling Fan
140mm, Two Ball Bearing
Typical Efficiency
≥90% at Typical Load
Operating Temperature
0–50°C
Power Good Signal
100–150ms
Hold-Up Time
≥16ms at 100% Load
MTBF
More than 100,000 Hours
+12V Rail
104A / 1248W
Modularity
Fully Modular
ATX Motherboard Connector
1 × 24-pin (650mm)
CPU Power Connectors
1 × EPS 4+4-pin and 1 × EPS 8-pin (650mm each)
PCIe 6+2-Pin Connectors
3 × PCIe (550mm)
12V-2x6 Connector
1 × Native Connector (650mm)
SATA Connectors
12 across 3 cable runs
Peripheral 4-Pin Connectors
4
Protection Features
OVP, OPP, SCP, OCP, UVP, OTP, Inrush Protection
Warranty
10 Years
Note: Specifications are based on published documentation for model MPE-C501-AFCAG-3EIN. Confirm the supplied unit's model label, cable set and warranty documentation before finalising the product listing.
Recommended Use Cases
High-End Gaming PCs
A high-capacity option for compatible gaming configurations using powerful CPUs and graphics cards within the PSU's wattage and connector limits.
Content Creation Workstations
Can support demanding creative workloads when the processor, graphics card and additional components fit the system's power budget.
Modern GPU Builds
The native 12V-2x6 connector is intended for compatible modern graphics cards. Check the specific GPU's power guidance before installation.
Enthusiast PC Builds
Fully modular cabling and high rated output make this PSU a potential fit for elaborate builds with multiple drives and demanding components.
Before You Buy the Cooler Master MWE Gold 1250 V2
- Calculate the total power requirements of your CPU, graphics card, storage drives, cooling system and peripherals before selecting a PSU.
- Verify that your graphics card supports the supplied native 12V-2x6 connection or the included PCIe cables. Follow the GPU manufacturer's installation instructions.
- Use only the modular cables supplied or explicitly approved for this exact PSU. Modular cables from different models can have incompatible pinouts.
- Check the cabinet's PSU clearance. The unit measures 180 × 150 × 86mm, excluding the additional space needed for cables.
- The PSU is rated for operating temperatures up to 50°C, but adequate airflow and sensible cable routing remain important for reliable operation.
- Confirm the exact model suffix and 10-year warranty terms with your distributor before purchase.
Frequently Asked Questions
1. What is the rated output of the Cooler Master MWE Gold 1250 V2?
The power supply is rated at 1250W, making it suitable for compatible high-performance systems whose total power requirements fall within its specifications.
2. Is the MWE Gold 1250 V2 ATX 3.1 compatible?
Yes. The model code MPE-C501-AFCAG-3EIN identifies the ATX 3.1 version. Make sure not to confuse it with older ATX 3.0 versions of the MWE Gold 1250 V2.
3. Does it include a native 12V-2x6 GPU power connector?
Yes. Published specifications list one native 12V-2x6 connector with a 650mm cable, supporting up to 600W for compatible graphics cards.
4. Is this power supply fully modular?
Yes. Its fully modular design allows you to connect only the cables needed for your build, helping simplify installation and cable management.
5. What efficiency certification does it have?
The MWE Gold 1250 V2 ATX 3.1 carries an 80 PLUS Gold rating. Published specifications indicate at least 90% efficiency at typical load under the applicable testing conditions.
6. How many PCIe and SATA connectors are provided?
Published specifications list three PCIe 6+2-pin connectors, one native 12V-2x6 connector, 12 SATA connectors and four peripheral 4-pin connectors.
7. What protection features are included?
The listed protection features include over-voltage protection (OVP), over-power protection (OPP), short-circuit protection (SCP), over-current protection (OCP), under-voltage protection (UVP), over-temperature protection (OTP) and inrush protection.
8. What is the warranty period?
The model is listed with a 10-year manufacturer warranty. Check the invoice and regional warranty terms for the exact unit purchased.
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