MSI MEG Ai1300P PCIE5 1300W 80 Plus Platinum Power Supply Review

Efficiency

The efficiency is very good, and it scored right on the edge of making the 80 Plus Platinum rating, throughout most of the range, but easily exceeded it once the PSU got up to 100% load. Even so, it’s still Platinum-rated, and that’s really a fantastic achievement for any PSU.

PFC (Power Factor Correction)

The PFC is also very good, with a rating that’s very smooth in transition as the load increases, but between 60-100% load the PFC is just 0.96 to 0.98. This means there’s significantly less power correction being done, and this will result in less heat being generated or power being wasted, although you could argue that they’re one and the same thing.

Voltage Regulation

Voltage regulation is fantastic, and while there’s a higher deviance on the 3.3% keep in mind that it’s on a smaller voltage so this is just 3.39v and overall still excellent, but with the most important 12V being under 1% is superb, and well under the 3% target we like to see.