Back in December, we had the opportunity to take a look at MSI's MEG A1300P power supply, the company's latest flagship PSU. Besides offering plenty of power, the MEG Ai1300P was also MSI's first ATX 3.0 power supplies – and one of the first ATX 3.0 PSUs on the market overall. And while it was admittedly not a groundbreaking design overall, it was still a seminal work of sorts, sketching out a ro…