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MSI MPG A750GF Power Supply Review

MSI did a far better job than Gigabyte in its PSU products, but is this enough?

MSI MPG A750GF
(Image: © Tom's Hardware)

Tom's Hardware Verdict

The MSI MPG A750GF uses an older, but still capable, platform, provided by CWT, feahigh build quality.

Pros

  • +

    + Full power at 47 degrees Celsius

  • +

    + High enough overall performance

  • +

    + Good build quality

  • +

    + Quality cooling fan

  • +

    + Tight load regulation on all rails

  • +

    + High enough average efficiency

  • +

    + Silent at light and moderate loads

  • +

    + Fully modular

  • +

    + Loads of connectors

  • +

    + Compatible with the alternative sleep mode

  • +

    + Adequate distance between peripheral connectors

  • +

    + 10-year warranty

Cons

  • -

    - Inaccurate power ok signal

  • -

    - Increased EMI emissions

  • -

    - Mediocre transient response

  • -

    - Low PF readings

  • -

    - Lower than 70% efficiency with 2% load

  • -

    - Increased noise under stressful conditions

  • -

    - Not so efficient 5VSB rail

The MSI MPG A750GF is not far from the tough competition when it comes to overall performance, but the big letdowns are the inaccurate power ok signal and the low hold-up time, which don't allow it a place in our best PSUs article. Moreover, MSI's offering is not among the silent 750W Gold PSUs. If you need a quiet PSU, under all conditions, instead take a look at the Cooler Master V750 Gold V2 or the XPG Core Reactor 750

MSI currently has two PSU lines, with the top one called MPG. There are three MPG models with capacities from 650W to 850W, and in this review, we will look at the middle MPG member with 750W max power. All MPG units are made by Channel Well Technology and use a fully modular cable design, which most users prefer. 

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MSI MPG A750GF

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MSI MPG A750GF

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MSI MPG A750GF

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MSI MPG A750GF

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The 750 W MPG model has two EPS and six PCIe connectors, which are overkill for this capacity range. Nonetheless, two PCIe connectors are on dedicated cables, which is preferred for energy-hungry graphics cards. Another notable feature in this unit is the double ball-bearing fan, which won't have a problem operating under high operating temperatures. 

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MSI MPG A750GF

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Specifications of MSI MPG A750GF

Manufacturer (OEM)CWT
Max. DC Output750W
Efficiency80 PLUS Gold, Cybenetics Platinum (89-91%)
NoiseCybenetics Standard++ (30-35 dB[A])
Modular✓ (fully)
Intel C6/C7 Power State Support
Operating Temperature (Continuous Full Load)0 - 40°C
Over Voltage Protection
Under Voltage Protection
Over Power Protection
Over Current (+12V) Protection✓ (only +12VMBPH and +12VCPU)
Over Temperature Protection
Short Circuit Protection
Surge Protection
Inrush Current Protection
Fan Failure Protection
No Load Operation
Cooling140mm Double Ball Bearing Fan (HA1425M12B-Z)
Semi-Passive Operation
Dimensions (W x H x D)150 x 85 x 160mm
Weight1.55 kg (3.42 lb)
Form FactorATX12V v2.52, EPS 2.92
Warranty10 Years

Power Specifications of MSI MPG A750GF

Rail3.3V5V12VMBPH12VCPU12VVGA112VVGA25VSB-12V
Max. PowerAmps2222252535352.50.3
Watts120750
Total Max. Power (W)750

12VMBPHATX, Peripheral
12V CPU2x EPS or 1x EPS & 1 PCIe
12V VGA12x PCIe
12V VGA21x PCIe

There are four +12V rails, one for the ATX and peripheral connectors, one for the EPS connectors, and two for the PCIe connectors. If you only need a single EPS connector, you can use the other socket on the modular PCB to connect a PCIe cable, increasing their number. This means that you cannot have all four PCIe and two EPS cables connected at the PSU simultaneously. You can either have three PCIe cables and two EPS or four PCIe cables and a single EPS, which are more than enough anyway for a 750W PSU.

Cables and Connectors for MSI MPG A750GF

DescriptionCable CountConnector Count (Total)GaugeIn Cable Capacitors
ATX connector 20+4 pin (600mm)1118AWGNo
4+4 pin EPS12V (700mm)2218AWGNo
6+2 pin PCIe (500mm) 2218AWGNo
6+2 pin PCIe (500mm+150mm) 2418AWGNo
SATA (500mm+150mm+150mm+150mm)2818AWGNo

4 pin Molex (500mm+150mm+150mm+150mm) / FDD (+150mm)

14 / 118-20AWGNo
AC Power Cord (1400mm) - C13 coupler1118AWG-

There are enough cables and connectors, for a 750W power supply, and the distance between the peripheral connectors is ideal at 150mm. All connectors use the standard AWG18 gauges, and there are no in-cable caps which might help in ripple suppression, even in transient response, but make the cables bulky and difficult to route inside a case. 

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MSI MPG A750GF

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Component Analysis of MSI MPG A750GF

We strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss.

General Data-
Manufacturer (OEM)CWT
PCB TypeDouble Sided
Primary Side-
Transient Filter4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x Power Integrations CAP200DG (Discharge IC)
Inrush ProtectionNTC Thermistor SCK-055 (5 Ohm) & Relay
Bridge Rectifier(s)
2x GBU1506 (800V, 15A @ 120°C)
APFC MOSFETs
2x Infineon IPA60R125P6 (600V, 19A @ 100°C, Rds(on): 0.125Ohm)
APFC Boost Diode
1x On Semiconductor FFSP0665A (650V, 6A @ 153°C)
Bulk Cap(s)1x Nippon Chemi-Con (420V, 560uF, 2,000h @ 105°C, KMR)
Main Switchers
2x Infineon IPA60R125P6 (600V, 19A @ 100°C, Rds(on): 0.125Ohm)
APFC Controller
Champion CM6502UHH & CM03X
Resonant ControllerChampion CM6901X
Topology
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side-
+12V MOSFETs6x Infineon BSC014N04LS (40V, 125A @ 100°C, Rds(on): 1.4mOhm)
5V & 3.3VDC-DC Converters: 2x UBIQ QM3006D (30V, 57A @ 100°C, Rds(on): 5.5mOhm)
2x UBIQ QM3016D (30V, 68A @ 100°C, Rds(on): 4mOhm)
PWM Controller(s): ANPEC APW7159C
Filtering Capacitors

Electrolytic: 6x Nichicon (4-10,000h @ 105°C, HE), 3x Rubycon (4-10,000h @ 105°C, YXF), 2x Rubycon (6-10,000h @ 105°C, ZLH), 5x Nichicon (4-10,000h @ 105°C, KY), 2x Nichicon (4-10,000h @ 105°C, KYA)
Polymer: 17x FPCAP, 1x Nippon Chemi-Con

Supervisor ICSitronix ST9S429-PG14 (OCP, OVP, UVP, SCP, PG) & EST EST7618 (OCP, SC)
Fan ModelHong Hua HA1425M12B-Z (140mm, 12V, 0.36A, Ball Bearing Fan)
5VSB Circuit-
Standby PWM ControllerPower Integrations TNY177PN
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MSI MPG A750GF

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This is the popular CWT GPU platform, which is also used in the Bitfenix Whisper series models. Although it is not cutting edge anymore, still it is highly competitive, especially if you tune it a bit and carefully select some crucial parts. The heat sinks are small, but build quality is high and there is also ample space on the PCB, for good airflow. 

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MSI MPG A750GF

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MSI MPG A750GF

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The transient and EMI filter has all the necessary parts. It also includes a discharge IC to restrict energy losses. 

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MSI MPG A750GF

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MSI MPG A750GF

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The pair of bridge rectifiers can handle up to 30A of current. 

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MSI MPG A750GF

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The APFC converter uses two Infineon FETs and a single boost diode provided by On Semiconductor. The bulk cap is of high quality, but it doesn't have the necessary capacity to offer a longer than 17ms hold-up time. Lastly, the APFC controller is a Champion CM6502UHH.

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MSI MPG A750GF

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The main FETs, two Infineon IPA60R125P6, are installed in a half-bridge topology. The resonant controller is a Champion CM6901X.

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MSI MPG A750GF

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Six Infineon FETs regulate the 12V rail, and two DC-DC converters generate the minor rails. 

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MSI MPG A750GF

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All filtering caps are of high quality, and besides electrolytic caps many polymer ones are also used. 

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MSI MPG A750GF

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MSI MPG A750GF

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The standby PWM controller is a Power Integrations TNY177PN IC. 

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MSI MPG A750GF

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MSI MPG A750GF

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Several polymer caps are installed on the modular board, along with bus bar which transfer power with minimized energy losses. 

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The main supervisor IC is a Sitronix ST9S429-PG14 and it is supported by an EST EST7618 IC. 

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MSI MPG A750GF

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Soldering quality is good. 

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The cooling fan is by Hong Hua and uses a double ball-bearing, so it will last for a long time, even under high operating temperatures. DBB fans are considered of higher quality than FDB ones, but are also more noisy and more expensive. 

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Aris Mpitziopoulos
Aris Mpitziopoulos

Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.