This ‘Silent Gale' fan (PLA12025S12H-4) seems to have been around for 6 years under other MSI brand names such as ‘TORX'.

The OEM behind the creation of the MSI MEG Ai1300P is Channel-Well Technologies, or CWT. They are a very popular and reputable manufacturer of mid-to-high-performance PC PSUs. This platform can be described as a hybrid, as it essentially is a standard analog platform but with extra digital electronics added to it. The digital electronics allow for the monitoring of the unit’s basic performance figures, as well as limited control (fan cooling profile, OCP limits, etc) via the USB interface. What really does stand out is the heatsinks, which do have plenty of dissipation surface but are also designed to be aesthetically appealing – an odd (but not unwelcome) design choice considering they should not be visible to the end user. We take the issue of noise very seriously at KitGuru and this is why we have built a special home brew system as a reference point when we test noise levels of various components. Why do this? Well this means we can eliminate secondary noise pollution in the test room and concentrate on components we are testing. It also brings us slightly closer to industry standards, such as DIN 45635. With the determination of transcending current gaming products, the flagship models push the limits of what an extreme gaming series can be. The other side of the power supply houses the modular connectors. The power supply can support current generation graphics cards, and if you pay attention you can see the +12VHPWR connector top left which means you can also connect up a new Nvidia RTX 4000 series graphics card. 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.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. Had I kept Unigine Heaven running, would the fan have eventually started? That's still not clear to me. 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

Multi/Single Rail Switch: It can switch between single and multi-rail according to the needs of users while taking into account high current output and safety protection. Main Output Load (Watts) 264.41 W 659.2 W 975.71 W 1297.87 W Load (Percent) 20.34% 50.71% 75.05% 99.84% Amperes Volts Amperes Volts Amperes Volts Amperes Volts 3.3 V 2.32 3.37 5.79 3.37 8.68 3.36 11.58 3.35 5 V 2.32 5.06 5.79 5.05 8.68 5.03 11.58 5.02 12 V 20.07 12.2 50.16 12.17 75.24 12 100.33 11.97 The unit has OCP, OVP, OPP, OTP, SCP and UVP protections and MSI claim 100% Japanese 105c Capacitors throughout – which we will look at later in the review.So why, i hear you ask, does it only feel this hot with this PSU? The only explanation can be airflow. We know the power draw of the attached components (it will not change between PSUs, if the other one is equally capable), we know the efficiency of the PSU because it shows it, and the efficiency is as high as you can get, more or less. So another PSU can't have lower losses than maybe 40W at that kind of power draw. One big variable that changed in regards to the heat radiating from the PC is therefore the PSU fan not spinning under such load. A spinning fan, even though the PSU a bit covered down there in the "PSU tunnel" (although i've since looked at a more detailed picture of the case, and it seems like there are lots of ventilation holes down there), can perhaps create a sort of "draft/vortex effect" when the air is accelerated out of the PSU, taking some hot air from further above in the PC with it more behind the PC. Something like that.