The MSI MPG A1000G PCIE5 PSU Evaluate: Stability of Energy

Again in December, we had the chance to check out MSI’s MEG A1300P energy provide, the corporate’s newest flagship PSU. Moreover providing loads of energy, the MEG Ai1300P was additionally MSI’s first ATX 3.0 energy provides – and one of many first ATX 3.0 PSUs available on the market total. And whereas it was admittedly not a groundbreaking design total, it was nonetheless a seminal work of types, sketching out a tough image of what we should always anticipate from different ATX 3.0 PSU designs, together with MSI’s personal.

The MEG Ai1300P was a real flagship PSU, for all the professionals and cons that include that. As spectacular because it was total, it was additionally geared toward these keen and in a position to cope with the hefty price ticket. That is all nicely and good for the small fraction of the market that may afford such a excessive caliber PSU, however for many PC builders, budgets are a really actual factor.

So, for as we speak’s overview, we’re having a look at one thing a little bit extra downmarket from MSI: their MPG collection. Like their flagship items, the brand new MPG PSUs are are also ATX 3.0 Prepared, however they arrive at extra cheap costs. Regardless of that shift, the unit we’re testing as we speak, the MPG A1000G, remains to be one of the crucial highly effective PSUs MSI gives (in addition to being the highest MPG unit), able to delivering a kilowatt of PC energy.

Energy specs ( Rated @ 50 °C )
RAIL +3.3V +5V +12V +5Vsb -12V
MAX OUTPUT 22A 22A 83.5A 3A 0.3A
120W 1000W 15W 3.6W
AC INPUT 100 – 240 VAC, 50 – 60 Hz
MSRP $199


All of this marks a somewhat fast ascent within the PSU area for MSI. The corporate launched its first PSU simply two years in the past with the MPG GF collection, which had been primarily designed for gaming computer systems. Regardless that MSI stepped right into a extremely aggressive and somewhat saturated market, the discharge of the MPG collection was one more success for the corporate, which MSI is hoping to additional construct upon with their new PCIE5-branded MPG items.

Packaging and Bundle

We acquired the MPG A1000G PCIE5 in a sturdy cardboard field with fundamental geometric art work printed on it. The entrance of the field is generally occupied by an image of the unit itself however considerable data is printed on the perimeters and rear of the field. Contained in the field, the unit is well-packed inside comfortable packaging foam, guaranteeing secure transport.

The bundle of the MPG A1000G PCIE is extraordinarily frugal, with MSI supplying solely the required AC energy cable and 4 black mounting screws. There are zero equipment of any sort provided with this unit.

The MPG A1000G PCIE PSU is a totally modular design, permitting for the removing of each DC energy cable, together with the 24-pin ATX connector. Many of the cables have individually sleeved black wires and with black connectors. Solely the 16-pin PCIe 5.0 cable and one cable with two PCIe 8-pin connectors have black wires however are wrapped in a single sleeve.

Connector sort Hardwired Modular
ATX 24 Pin 1
EPS 4+4 Pin 2
EPS 8 Pin
PCI-E 5.0 1
PCI-E 8 Pin 6
Molex 4
Floppy 1


Exterior Look

MSI is an organization that invests numerous sources within the exterior look of its merchandise and that features its PSUs. Very similar to the MEG collection unit that we reviewed just a few weeks again, the MPG collection is utilizing a proprietary chassis with embossed geometrical shapes. The design is similar to that of the MEG collection however not fairly the identical – the golden accents are actually silver and a few geometrical decorations differ, with the MPG having solely rectangular patterns and no triangular shapes. The PSU is simply 150 mm lengthy, making it solely barely longer than what the ATX normal dictates, but it stays brief sufficient to make sure its compatibility with all however the smallest ATX-compliant circumstances.


The sticker with the unit’s electrical certifications and specs might be discovered on the in any other case plain prime aspect of the PSU. Ornamental silver and black metallic plates might be discovered on the perimeters of the unit, which plates are magnetically connected and might be flipped to match the set up orientation of the PSU.

On the rear aspect of the unit, proper subsequent to the AC energy connector and the fundamental on/off swap, there’s a latching push button that controls the “zero-fan mode”. Because the title suggests, this mode permits for passive operation whereas the PSU’s load is low – a often utilized approach by many producers these days. Disabling it’s going to pressure the fan to repeatedly spin so long as the PSU is powered on, however its pace will nonetheless be managed thermally.

The entrance aspect of the unit is host to the quite a few connectors for the modular cables. A delicate legend is printed instantly on the chassis.

Inside Design

The cooling fan of the MPG A1000G PCIE5 is a 135 mm mannequin by Hong Hua, a somewhat common producer whose followers we often see in high quality PC PSUs. The HA13525H12SF-Z is a fan that satisfies the cooling wants of the MPG A1000G PCIE5, although it’s a very high-speed fan for its measurement, with a most pace of 2300 RPM. It has a fluid dynamic bearing (FDB) engine that gives wonderful longevity.

The OEM whose platform the MPG A1000G PCIE5 is predicated upon is Channel-Effectively Applied sciences, or CWT. CWT is a well-liked OEM for mid-to-high efficiency PSUs and so they are also the OEM behind MSI’s flagship MEG collection. The MPG A1000G PCIE5 is predicated on a special platform than that used for the MEG collection, which appears to be an upgraded model of one of many CWT’s hottest platforms. This platform has been the center of many items having an analogous energy output over the previous few years. With a purpose to match the 135 mm fan within the 150 mm chassis, CWT cleverly shortened the vertical daughterboards to supply sufficient clearance.


Total, the MPG A1000G PCIE5 appears very crowded due to its very excessive energy density – the structure is pretty easy. The filtering stage is typical, with 4 Y capacitors, two X capacitors, and two filtering inductors. The filtering stage results in two giant rectifying bridges, that are positioned on their very own sizable heatsink. The passive elements of the APFC circuitry are a humongous 400V/820μF APFC capacitor Nichicon and an equally giant encased filtering inductor. The energetic APFC elements are on the longest heatsink of the unit.


Two transistors might be discovered on their very own heatsink, forming a typical half-bridge inversion topology on the first aspect of the unit’s primary transformer. The output of the principle transformer is related to eight energy MOSFETs that generate a single 12V rail, which is positioned on a vertical daughterboard. The three.3V and 5V traces are being generated by way of DC-to-DC conversion circuitry that may be discovered on the following vertical daughterboard. The secondary aspect capacitors are all made by Nippon Chemi-Con and Nichicon, or their subsidiary firms, making this PSU an all-Japanese affair.