MSI introduces MEG Ai1300P, the world’s first ATX 3.0 compatible power supply with a full 600W PCIe Gen5 slot


MSI’s MEG Ai1300P PCIE5 is the world’s first ATX 3.0 compatible PSU

MSI welcomes the MEG Ai1300P PCIE5 power supply, the world’s first fully ATX 3.0 and PCIe 5.0 compatible power supply. With graphics cards becoming more and more important, users need to know which components to buy for their system if they want to upgrade. To understand why the MEG Ai1300P PCIE5 is the ultimate future-proof power supply unit, let’s start by understanding ATX 3.0.

What is ATX 3.0?
ATX 3.0 is Intel’s new specification standard for legacy power supplies. In short, the main purpose of ATX 3.0 is to help provide more reliability and better power efficiency and to provide graphics cards with up to 600 watts of power. ATX 3.0 is created in response to the increased performance of graphics cards and the ever-increasing need for power.

ATX 3.0 places heavy emphasis on power excursions to ensure high performance graphics cards can be sustained and your system can remain stable. Thanks to ATX 3.0 there is now an increase in idle efficiency and a new power connector is added to help achieve all of the above.

ATX 3.0 added a new PCIe 5.0 12VHPWR connector that has 12+4 pins instead of the traditional 6 or 8. With the new PCIe 5.0 connector, the power supply and cable can provide up to 600 watts of power.

Fully ready for PCIe 5.0 and ATX 3.0

Many power supplies on the market do not yet fully support ATX 3.0. Many will need an adapter that connects all three or four 8-pin PCIe connectors to the single PCIe 5.0 12VHPWR connector. It is also difficult to know where to plug the adapters. MSI’s MEG Ai1300P PCIE5 power supplies are fully compatible with PCIe 5.0 and ATX 3.0. With a native 16-pin PCIe (12VHPWR) connector, the MEG Ai1300P PCIE5 is ready for all future high-performance graphics cards. It can freely supply up to 600W of power to PCIe 5.0 graphics cards. To withstand the higher currents needed by the graphics cards or processor, the connectors of the MEG Ai1300P PCIE5 power supplies use copper alloy terminals for better security.

Everything is legit and backed by testing

According to PCI-SIG, graphics cards are capable of exceeding their maximum power by 3 times. This is especially the case for high-performance graphics cards such as the NVIDIA GeForce RTX 3090 Ti or upcoming next-gen NVIDIA graphics cards. It is believed that the next graphics cards need 600W of power and will have power excursions up to 1800W. Power excursions only last 100 microseconds but can already be very disruptive to the computer system. Power excursions are also known as power spikes by many people.

Intel testing requirements

MEG Ai1300P PCIE5 test result

In the table below, you can see that the MEG Ai1300P PCIE5 can safely achieve 2x full power excursion at 200% PSU power while meeting all Intel test requirements at 120 %, 160% and 180% as well. The voltage of the MEG Ai1300P PCIE5 can be controlled within the allowable voltage range when the current changes rapidly and violently to maintain system stability and prevent system abnormalities.

OPP and OCP maintained for maximum security

It is important to keep in mind that some PSUs may find a way around power spikes by increasing the threshold for OPP and OCP. This is not the case with the MEG Ai1300P PCIE5. As shown in the table below, the MEG Ai1300P PCIE5 maintains the OPP level of 1300W x 1.25 at 1623.55W.

Power sync values ​​are successful

To be fully ATX 3.0 compliant, there is also a timing value that the PSU must meet. The MEG Ai1300P PCIE5 is fully compliant with this timing value as shown in the table below.

Intel testing requirements

MEG Ai1300P PCIE5 test result

With future high performance graphics cards slowly approaching, it is all the more important that users be prepared if they are planning to upgrade their systems. The MEG Ai1300P PCIE5 is the ideal power supply for users looking to upgrade to high performance components due to its full compliance with ATX 3.0 and PCIe 5.0.


“end of press release”



Alan A. Seibert