MSI MPG A1000G PCIE5 ATX v3.1 PSU Review

The MSI MPG A1000G PCIE5 is an ATX v3.1 compliant power supply, using, the omnipresent CSZ platform, provided by Channel Well Technology. This platform is currently used by almost all known brands, namely DeepCool, Thermaltake, NZXT, Montech, XPG, and SilverStone. When a platform is widely used, it means that it is reliable and offers good performance for its money. 

The MSI MPG A1000G PCIE5 is included in my best ATX v3.x & PCIe 5.x PSU picks article.

MSI is doing a good job in the PSU market since they only cooperate with reliable OEMs with vast experience in the desktop PSU market. So far, I have reviewed two MSI PSUs for this site, and you will find more in the Cybenetics PSU database.

The MSI MPG A1000G PCIE5 is a high-end power supply with enough capacity to handle a strong processor and an RTX 4090. It has a 50°C temperature rating, meaning it can continuously deliver its full power at 50°C without sweating. As a reviewer, I used to dial 50°C in my hot box in my early days, and as a result, most PSUs died. I had about a 50-60% kill ratio, so I moved it back to 46°C (+-1) for 50°C rated PSUs. Back to the sample in hand, it has compact enough dimensions with a 150mm length; it is equipped with a 135mm Hong Hua FDB fan, and it is ATX v3.1 compliant, meaning that it has a 12V-2×6 header on its modular board, and a ten-year warranty supports it.



Technical Specifications:
  • Manufacturer (OEM): Channel Well Technology
  • Max Power: 1000W
  • Cybenetics Efficiency: [115V] Cybenetics Gold (87-89%)
  • 80 Plus Efficiency: Gold
  • Noise [115V]: Cybenetics Standard++ (30-35 dB[A])
  • Compliance: ATX12V v3.1, EPS 2.92
  • Operating Temperature (Continuous Full Load): 0 – 50°C
  • Alternative Low Power Mode support: Yes
  • Power 12V combined: 1000W
  • Number of 12V rails: 1
  • Power 5V + 3.3v: 120W
  • Power 5VSB: 15W
  • Cooling: 135mm Fluid Dynamic Bearing Fan (HA13525H12SF-Z)
  • Semi-Passive Operation: ✓ (selectable)
  • Modular Design: ✓ (Fully)
  • High Power Connectors: 2x EPS (1x cable), 6x PCIe 6+2 pin (3x cable),  1x PCIe 12+4 pin (600W)
  • Peripheral Connectors: 12x SATA (3x cables), 4x 4-pin Molex (1x cables)
  • ATX Cable Length: 600mm
  • EPS Cable Length: 750mm
  • 6+2 pin PCIe Cable Length: 600mm + 150mm
  • 12+4 pin PCIe Cable Length: 600mm
  • Distance between SATA / 4-pin Molex: 150mm
  • In-cable capacitors: No
  • Dimensions (W x H x D): 150 mm x 85 mm x 150mm
  • Weight: 1.75 kg (3.86 lb)
  • Warranty: ten-years
  • MSRP (excluding VAT): $160

Power Specifications

Rail 3.3V 5V 12V 5VSB -12V
Max. Power Amps 20 20 70.5 3 0.3
Watts 120 1000 15 3.6
Total Max. Power (W) 1000
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25 thoughts on “MSI MPG A1000G PCIE5 ATX v3.1 PSU Review

  1. I am from India…I have one question ….this particular model MPG A1000G and also Corsair rm750e and 850e all the model belongs to Tiar A list….though the msi one belongs to speculative section….but the problem is there is notation with 14number code with all these psus that says “Potential ATX 3.0 units either not tested for compatibility (no Aris review), not received the certification (no entry in Intel’s DB), having problems with passing ATX 3.0 tests (failed Aris review), or without proper reviews in the first place to put them in the normal priority subtier.”

    I am not getting this point…..atx 3.0 failed burned or what ? ……even Corsair HX-i series have that same note…can you explain what is the case…I have budget of 190usd….in India these are the main bands available….others not…..I am a little bit worried about my purchase…

  2. I recently bought the 850W version of this PSU and i do have the 12V2x6 marking. Does this automatically mean that i got new ATX 3.1 PCIe 5.1 revision with proper new connector? Or this is “fake” marking like in the MSI 850GL reviewed here and in fact it still uses the old 12VHPWR?

    1. Look at the four sense pins of the connector. If they are deep inside the socket you have 12V-2×6 indeed, but if they are close to the edge, then it is 12VHPWR.

  3. That doesn’t sound true. Super flower only offers an adapter like connection with its 2x8pin, furthermore it lack sense connectors on both sides of the cable.
    How is it 3.1 without any sense pins?

    1. which sense pins you are refering one? the optional ones? The ones that no GPU has the corresponding circuit, which are OPTIONAL for the PSU?
      The only required sense pins are the ones to set the max power of the 12+4 pin cable.

      1. From another detailed review I found:

        Interestingly, the 12VHPWR – cable is made in the form of an adapter to conventional PCI-E connectors. 12-pin pad is connected to the modular board of the BP through two 8-pin sockets, each with six wires. NVIDIA adapters usually have three or four 8-pin contacts, but they are connected via cables, and here the connection is directly to the modular connectors, which in theory should withstand a load of up to 600 watts.

        According to the manufacturer, this method of connection is made intentionally, to increase the reliability of contacts from the power supply, in order to avoid possible problems.

        Signal wires are not connected in any way, two wires (SENSE0 and SENSE1) are removed from the pad and simply isolated near it, which gives a signal to the video card about the maximum thermal budget of 600 watts.

        It becomes clear that compatibility with PCIe 5.0 is purely nominal, the power supply is simply equipped with a cable-adapter on the connector 12VHPWR.

        There’s no doubt that Super Flower’s shoppers will be there. First of all, they’re fans of the brand releasing power supplies on its own original platform. But they’d probably like to see full PCI-E 5.0 support with all the signal lines provided by the standard (SENSE0, SENSE1, CARD_PWR_STABLE and CARD_CBL_PRES#), or at least the first two.

          1. I sense sarcasm, but unless they got a different review sample, the claim is that this PSU is lacking any signaling an up to date PSU should have.
            In your review you say only CARD_PWR_STABLE and CARD_CBL_PRES# are missing and that’s for most of the PSUs
            why is this not an issue? if one buy a PSU in 2024 why shouldn’t they care about sense 0, sense 1 missing? am I not getting fooled if a new standard is out and recommended and I buy something that is already obsolete?

      1. Do you know if there is any way to discern on the box if it’s the old or new version? It seems to be quite the lottery right now depending on if the retailer has old or new stock (or a mix). I haven’t been able to figure out the manufacturing date by the serial number yet.

  4. Thanks a lot for this refreshed version of one of the first premium atx 3.0 psu, kinda sad to see it’s not improved so much. Any chance to review or have a comment on the atx version of the Corsair hx1500i, very much appreciated!

  5. Thank you for the work you do. I bought the previous power supply 10 years ago, now I have upgraded to NVIDIA 3070, I want to change the unit, but I don’t understand whether it’s worth waiting for version 3.1. I would like to take a power supply with a reserve, if we talk about video cards, so that it will be enough for 2-3 generations. Options I’m considering
    Super Flower Leadex VII Gold 1000W
    DeepCool PX1000G 1000W
    be quiet! Pure Power 12 M 1000W
    Or should I still wait for version 3.1?

      1. Are these all versions of this power supply, or from some kind of p/n or revision? What can you say about the quality of this block?

      1. Hi Crmaris !

        Can you explain why you choose rm1000x shift over A1000G who seem to be great aswell ?

        On the site in best 3.0 the MSI MEG Ai1000P is the second in Best Overall Performance (230V)

        On amazon the rm1000x shift is 200€ while A1000G is 160€, in this case what would you choose ?

        And there is Thermaltake Toughpower GF3 at 166€ too, between this 3, what can I go for having the best for many many years ?


        1. The Ai1000P is not the same as the A1000G.
          If the shift is so expensive, then it doesn’t make much sense to proceed with it unless you want the side modular panel.
          Otherwise, you could go with the A1000G or the GF3 either. Look also at the GF A3, which is also good and affordable.

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