Intel requires the PSUs to have a slew rate of at least 5 A/μS, so an electronic load must be at least as fast as that figure to be able to perform ATX 3.0 compliance testing. From a professional’s point of view, proper testing would require the testing equipment to be at least 30% faster than the absolute minimum required. This requires a highly advanced (and expensive)electronic load with multiple modules, like the Chroma Mainframe andHigh-Speed modulesIntel themselves is using, which has a total slew rate of 8 A/μS and it would need only 0.02 ms to get the load from 65 A all the way up to 215 A – and that still is 20% of the test’s required 0.1 mstime in our example, a figure that many expertswould find far too great for precise measurements. Inside the outer box is a bag of cables and accessories and the power supply itself, wrapped in a plastic bag, sandwiched between two pieces of foam.

To be fully compliant with ATX 3.0, there’s also a timing value that the power supply unit must meet. The MEG Ai1300P PCIE5 is fully compliant with that timing value as shown in the chart below. MSI MEG Ai1300P & MPG A1000G Gen5 PSUs Final Impressions The MEG power supply measures 86mm x 150mm x 160mm which is somewhat smaller in length than the larger 200mm units we have seen in recent months. MEG PCIE5 Ai1300P is a model with a 1,300W capacity and 80PLUS PLATINUM certification. The cooling fan is a "MEG SILENT GALE P12" with a 120mm diameter, and you can perform real-time power monitoring and fan speed management using "MSI Center." Prepare an over current protection (OCP), over voltage protection (OVP), overload protection (OPP), over temperature protection (OTP), short protection (SCP), and under voltage protection (UVP) circuit for +12V. The dimensions of the body are 150mm wide, 160mm deep, and 86mm high. Today to test the power supply we have taken it into our acoustics room environment and have set our Digital Sound Level Noise Decibel Meter Style 2 one meter away from the unit. We have no other fans running so we can effectively measure just the noise from the unit itself.Correctly testing power supplies is a complex procedure and KitGuru have configured a test bench which can deliver up to a 2,000 watt DC load. Due to public requests we have changed our temperature settings recently – previously we rated with ambient temperatures at 25C, we have increased ambient temperatures by 10c (to 35c) in our environment to greater reflect warmer internal chassis conditions. One interesting feature MSI have incorporated- the two panels on the side are held in place magnetically, so they can be easily removed and flipped – depending on your chassis install rotation. This way you get to see the ‘MEG' logo as you want (or you could in theory remove them completely to get rid of some of the gold accenting if you wanted). These do have a tendency to drop off quite easily so you need to be careful when handling the power supply. ATX 3.0 puts heavy emphasis on power excursions to make sure high-performance graphics cards can be sustained and your system can remain stable. Thanks to ATX 3.0 there is now an increase in efficiency while idling and a new power connector is added to help achieve all the above. If you believe everything that the brand's marketing material states, then AIO coolers MSI released were the best coolers in the world, not the market, the world. From the chart below you can see that the MEG Ai1300P PCIE5 can safely achieve 2x total power excursion at 200% of the PSU wattage while meeting all the standards of Intel Testing Requirements at 120%, 160%, and 180% as well. The voltage of MEG Ai1300P PCIE5 can be controlled within the allowable voltage range when the current changes rapidly and violently to maintain the system stability and avoid system abnormalities. OPP and OCP Maintained for Maximum Safety

The Features panel highlights wattage, efficiency, temperatures and fan speeds. When the load is below 55% or temperatures are below 70 degrees the fan will automatically stop. The resistance of the MSI MEG Ai1300P PCIE5 unit to adverse ambient conditions is astonishing, with the unit hardly affected at all while operating inside our hotbox. There is a practically negligible efficiency degradation of 0.2-0.3% depending on the load, a figure four to six times lower than other similar designs. There is very little additional degradation under heavy loads, suggesting that the components of the MSI MEG Ai1300P PCIE5 are not thermally stressed at all. The efficiency of the MSI MEG Ai1300P does meet the 80Plus Platinum certification requirements when it is powered from an 115 VAC source. However, when the main’s voltage is 230 VAC, the efficiency is raised by an average of 1%, which is not enough to meet the 80Plus Platinum requirements for that input voltage. The average nominal load efficiency (20% to 100% of the unit's capacity) is 92.1% with the unit powered from a 230 VAC source, and drops down to 91.3% if the unit is powered by a 115 VAC source. It is also interesting to note that itsefficiency under very low loads is quite high, at above 83% for a 5% load. 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 the upcoming NVIDIA next-gen graphics cards. It is believed that the upcoming graphics cards need 600W of power and will have power excursions up to 1800W. The power excursions only last 100 microseconds but can already heavily disrupt the computer system. Power excursions are also known as power spikes by many people. MEG Ai1300P PCIE5 Testing Result Just under a year since the specification was first announced, the ATX 3.0 era for power supplies is now underway. The updated version of the Intel-maintained specification introduced several notable changes to PC power supply designs, most notably the introduction of the 600 Watt-capable 12VHPWR connector and associated cabling. Altogether, ATX 3.0 is designed to lay the groundwork for future video cards (and other high-powered accelerators) by providing for a single-cable power connection that can better accommodate the high total and rapid shifts in power consumption a video card can undergo.

OPP

What one can take away from the above table is the MSI MEG Ai1300P has everything you need for a powerful PC build. We don't have the means to measure ripple and other variations in power conversion, but we are able to monitor efficiency and how the power supply performs through use with a PC. It is important to keep in mind that some power supply units may find a way around the power spikes by lifting the threshold for OPP and OCP. This is not the case for the MEG Ai1300P PCIE5. As shown in the chart below, the MEG Ai1300P PCIE5 maintains the OPP level of 1300W x 1.25 at 1623.55W. Power Supply Timing Values Is A Pass A typical on/off switch can be seen at the rear side of the unit right next to the power connector. The front side of the unit is entirely covered by the numerous connectors for the modular cables. A golden legend is printed on the chassis. The tiny Mini-USB connector sits right above the large ATX 24-pin connectors, with the G.I. (i.e. Gaming Intelligence) legend printed right over it.

Kitguru says: The MSI MEG Ai1300P is a high performing power supply with interesting software enhancements that will appease the high end enthusiast audience. This modern design adopts quality internal components with 105c rated Japanese capacitors to help justify the eye watering asking price. The passive components of the APFC circuitry are two beefy 400V/680μF APFC capacitors made by Nichicon, followed by two filtering coils. The active APFC components are on the longest heatsink of the unit. Four transistors can be found on their own heatsink and these form the full-bridge inversion topology at the primary side of the unit. The output of the main transformer is connected to six power MOSFETs that generate a single 12V rail. The 3.3V and 5V lines are being generated via the DC-to-DC conversion circuits. All of the secondary capacitors, electrolytic and polymer alike, are made by Rubycon and Nippon Chemi-Con.What can be more Silent than a ‘GALE' you say? Well yes, I can think of quite a few things! We can only imagine the naming for this product was lost somewhere in translation between Asia and Europe. Electronic circuitry aside, the platform that the MEG Ai1300P is based upon is quite standard and proven. The filtering stage begins on the rear of the AC switch, with six Y capacitors, two X capacitors, and two filtering inductors. It is more than what specifications require but not overly large for such a design. The filtering stage leads to two large rectifying bridges, which are placed on their own heatsink. The MEG Ai1300P arrives in a very attractive box with a high resolution image of the power supply on the front.

The cables are a mixture of sleeved and custom sleeved to fit into a variety of builds. MSI also supply a MINI USB to USB cable as this power supply can be controlled via MSI software. MSI placed a lot of effort into the uniqueness of the MEG Ai1300P in terms of appearance. The company went with a fully customized chassis and metallic side decorations, using contrasting body colors but not fancy lighting, for a seamless and elegant look. From a practical point of view, the chassis of the massively powerful unit is just 160 mm long, making it compatible with any ATX-compliant case. The odd point here is the two cables which are fully sleeved instead of having individually sleeved wires like the rest of them. It has an output port that is compliant with PCIe 5.0 and Intel PSDG (Power Supply Design Guide) ATX 3.0, also the power supply can hold up to 2x total power excursion and 3x GPU power excursion. ATX 3.0 is Intel's new specification standard for existing PSUs. In short, ATX 3.0's main purpose is to help provide more reliability, and better power efficiency and provide graphics cards up to 600 watts of power. ATX 3.0 is created in response to graphics cards' increase in performance and the ever-increasing need for power. Sep 21st 2022 NVIDIA Details GeForce RTX 4090 Founders Edition Cooler & PCB Design, new Power Spike Management (77)The efficiency of the MSI MEG Ai1300P does meet the 80Plus Platinum certification requirements when it is powered from an 115 VAC source. However, when the main’s voltage is 230 VAC, the efficiency is raised by an average of 1%, which is not enough to meet the 80Plus Platinum requirements for that input voltage. The average nominal load efficiency (20% to 100% of the unit’s capacity) is 92.1% with the unit powered from a 230 VAC source, and drops down to 91.3% if the unit is powered by a 115 VAC source. It is also interesting to note that itsefficiency under very low loads is quite high, at above 83% for a 5% load. With the determination of transcending current gaming products, the flagship models push the limits of what an extreme gaming series can be. In addition to the MEG series, MSI has also introduced its MPG PSU lineup with the latest ATX 3.0 standard. This PSU lineup is designed with core enthusiasts & high-performance gamers in mind. For starters, the PSU is 80 Plus Golde Certified & comes equipped with 100% Japanese capacitors that are rated to run optimally up to 105C. This ‘Silent Gale' fan (PLA12025S12H-4) seems to have been around for 6 years under other MSI brand names such as ‘TORX'.