Cooler Master MWE Gold V2 1050W and MWE Gold V2 1250W White Edition PSU Review

Power Efficiency and Ripple Testing

Voltage Ripple and Efficiency Testing

When reviewing new power supplies at OC3D, we use our dedicated SunMoon PSU Tester, one of the most expensive (if not the most expensive) tools in the company’s arsenal. Here we can see exactly how well a unit functions. We look at both a PSU’s efficiency and power stability. To do this, we utilise bespoke PSU testing equipment to give us an in-depth look at each power supply’s performance. This kind of data collection is not possible when using a PSU with standard PC components.

Testing Limitations – 1200W

While our SunMoon power supply tester is a powerful piece of equipment, it is not all powerful. Our unit can only safely draw up to 1200W of power from PSUs, which is more than enough for most PSU testing, but too little to test the fullest capabilities of Cooler Master’s MWE Gold V2 1250W White Edition PSU. This means that the 100% load setting of this review will be limited to the maximum power that our SunMoon PSU tester can draw, not the maximum power than the MWE Gold V2 1250W White Edition can deliver.

PSU Efficiency Tests

Efficiency-wise, both Cooler Master’s MWE Gold V2 1050W and MWE Gold V2 1250W White Edition perform as expected. We achieved 90+% efficiency levels at all times during testing, and 20% load efficiency levels are higher than what we usually see from 80+ Gold rated PSUs.

PSU Ripple Tests

Voltage ripple is often underlooked by consumers, being best described as the stability of specific voltages that the PSU delivers. A PSU with bad ripple will see voltages vary a lot more. In extreme cases, this can can damage components or shorten their lifespans. Voltage ripple stability is one of the many reasons why you should buy a high-quality power supply. That means buying from a reputable brand and avoiding anything that isn’t 80+ certified.

An important thing to note here is that none of the PSUs in this graph are “bad”. Even bottom of the chart units like the original Corsair RM1000 (2014) bring usable within your system without any issues. We used this specific power supply within one of our main workstations for years, and we had no trouble with it. As we said before, only extreme levels of voltage ripple is dangerous.

Looking at our results for Cooler Master’s MWE Gold V2 Gold power supply, we can see that voltage ripple is nothing to be concerned about here. Yes, there are PSU models that perform better, but also many PSU models that deliver worse results. Even so, no PSU on this graph has ripple levels that we would find concerning.