Cooler Master MWE Gold 1250 V2: 1250W ATX 3.0 Modular Power Supply Explained

The Cooler Master MWE Gold 1250 V2 is a 1250W ATX 3.0 power supply for desktop PCs. It is fully modular, meets 80 PLUS Gold efficiency and includes a 12VHPWR connector for modern graphics cards. Here is what the main specs mean and what to confirm before building around it.

What ATX 3.0 and 12VHPWR mean

ATX 3.0 is an updated power supply standard that was developed with high-power graphics cards in mind. Its best-known feature is the 12VHPWR connector, a compact 12+4 pin plug. Cooler Master says a single cable can deliver up to 600W to a GPU, which removes the need for several separate PCIe power cables on cards that use this connector. Check which connector your graphics card uses. Cards with a 12VHPWR socket will take it directly, while others use the usual 6+2 pin PCIe cables.

The listing also mentions two EPS connectors. These power the CPU, and a second one is used on motherboards that call for extra CPU power.

80 PLUS Gold efficiency

The 80 PLUS Gold certification, Cooler Master notes, guarantees a minimum efficiency of 90%. Efficiency is how much of the power drawn from the wall reaches your components rather than being lost as heat. In general, higher efficiency means less wasted energy and less heat for the fan to remove. The certification is tested at set load points, so efficiency varies with how hard the system is working.

Fully modular cables

"Fully modular" means every cable detaches from the unit, so you plug in only what your build needs. Cooler Master describes the cables as flat and black. Fewer loose cables typically means a tidier case, better airflow and easier upgrades.

Fan and components

The cooling fan is 140mm. The brand describes it as a two ball bearing fan with high airflow and a long life, and the description calls it silent. A larger fan can generally turn more slowly for the same airflow, which usually means less noise. Cooler Master also says it uses 100% Japanese capacitors to improve efficiency and reduce ripple noise, and lists high temperature resilience.

How much wattage do you need?

1250W is a large power supply. It suits systems with a powerful graphics card and CPU, or builds with room to add more later. A PSU usually works most efficiently when the load is a good part of its capacity, so a modest system on a very large unit isn't always the sensible choice. Use the component makers' recommended wattages and the total of your parts to decide.

Size, weight and warranty

The listing gives dimensions of 13.5 x 8.0 x 5.0 inches and a weight of 8.1 lb (about 3.7 kg). Cooler Master lists a 5-year warranty. The model number is MPE-C501-AFCAG-3US.

Who it suits

It suits enthusiasts building or upgrading a PC with a high-power graphics card, especially one that uses the 12VHPWR connector, and anyone who wants a tidy, modular build.

What to check before you buy

• Length: a unit about 13.5 inches (34 cm) long needs a case with enough room.
• Connectors: confirm your graphics card's power connector and how many PCIe and EPS cables you need.
• Wattage: add up your components and leave headroom.
• Cables: use the cables supplied with this unit; modular cables are not interchangeable between brands or models.
• Mains supply: check the input voltage range in the manual and follow local electrical codes.

The short version

• 1250W, fully modular ATX 3.0 power supply.
• 12VHPWR connector, with up to 600W to a GPU over one cable.
• 80 PLUS Gold, with a minimum efficiency of 90% as certified.
• 140mm fan, Japanese capacitors, two EPS connectors.
• 5-year warranty.

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