MSI MPG A1000G PCIE5 ATX v3.1 PSU Review

Part Analysis

General Data
Manufacturer (OEM) CWT
Platform CSZ
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush Protection 1x NTC Thermistor SCK207R0 (7 Ohm) & Relay
Bridge Rectifier(s)
2x (2306)
2x Alpha Omega AOTF095A60L
APFC Boost Diode
1x CREE C3D10060A (600V, 12A @ 140°C)
Bulk Cap(s)
1x Nichicon (400V, 820uF, 2,000h @ 105°C, GL)
Main Switchers
2x Infineon IPA60R125P6 (600V, 19A @ 100°C, Rds(on): 0.125Ohm)
APFC Controller Champion CM6500UNX & CM03X
Resonant Controller Champion CU6901VA
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 8x On Semiconductor NTMFS5C430N (40V, 131A @ 100°C, Rds(on): 1.7mOhm)
5V & 3.3V DC-DC Converters: 2x UBIQ QM3054M6 (30V, 61A @ 100°C, Rds(on): 4.8mOhm) &
2x UBIQ QN3107M6N (30V, 70A @ 100°C, Rds(on): 2.6mOhm)
PWM Controller(s): uPI-Semi uP3861P
Filtering Capacitors Electrolytic:
1x Nichicon (2-5,000h @ 105°C, HD),
2x Nippon Chemi-Con (1-5,000h @ 105°C, KZE),
2x Nichicon (4-10,000h @ 105°C, HE),
2x Rubycon (4-10,000h @ 105°C, YXJ)
Polymer: 14x United Chemi-Con, 14x FPCAP
Supervisor IC IN1S3151 – SAG
Fan Controller Microchip PIC16F1503
Fan Model Hong Hua HA13525H12SF-Z (135mm, 12V, 0.5A, Fluid Dynamic Bearing Fan)
5VSB Circuit
1x D10PS45L SBR (45V, 10A)
Standby PWM Controller On Bright OB2365T

The OEM is Channel Well Technology (CWT), and the platform’s code name is CSZ. This is the same platform many ATX v3.x compliant models use since it was among the first to support the demanding transient response loads that this spec introduced. The platform uses analog controllers for all circuits. We find a half-bridge topology and an LLC resonant converter on the primary side. The secondary side utilizes a synchronous rectification scheme with eight Infineon FETs generating the 12V rail and two VRMs for the minor rails. The cooling fan is by Hong Hua and uses a fluid dynamic bearing, so it won’t have any issues in the long run if you don’t push it hard at high temperatures above 40 degrees Celsius. Lastly, the build quality is high; the same goes for the soldering quality. At the solder side of the PCB, CWT also enhanced some PCB traces with copper plates for better conductivity and lower power losses at high loads.

I have analyzed the CWT’s CSZ platform numerous times in past reviews, so there is no point in repeating the same stuff here again. Let’s move to the performance section.

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23 thoughts on “MSI MPG A1000G PCIE5 ATX v3.1 PSU Review

      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.

  1. 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?

  2. 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!

      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.

  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?

  4. 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.

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