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Cooler Master V750 Gold V2 Power Supply Review

One of the best 750W Gold PSUs, the Cooler Master V750 Gold V2.

Cooler Master V750 Gold V2
(Image: © Tom's Hardware)

Advanced Transient Response Tests

For details about our transient response testing, please click here.

In the real world, power supplies are always working with loads that change. It's of immense importance, then, for a PSU to keep its rails within the ATX specification's defined ranges. The smaller the deviations, the more stable your PC will be and the less stress will be applied to its components. 

We should note that the ATX spec requires capacitive loading during the transient rests, but in our methodology, we also choose to apply a worst case scenario with no additional capacitance on the rails. 

Advanced Transient Response at 20% – 20ms

VoltageBeforeAfterChangePass/Fail
12V12.267V12.128V1.13%Pass
5V5.127V5.068V1.15%Pass
3.3V3.307V3.180V3.84%Pass
5VSB4.966V4.903V1.27%Pass

Advanced Transient Response at 20% – 10ms

VoltageBeforeAfterChangePass/Fail
12V12.266V12.131V1.10%Pass
5V5.128V5.071V1.11%Pass
3.3V3.307V3.183V3.75%Pass
5VSB4.966V4.900V1.33%Pass

Advanced Transient Response at 20% – 1ms

VoltageBeforeAfterChangePass/Fail
12V12.270V12.106V1.34%Pass
5V5.128V5.047V1.58%Pass
3.3V3.307V3.197V3.33%Pass
5VSB4.966V4.914V1.05%Pass

Advanced Transient Response at 50% – 20ms

VoltageBeforeAfterChangePass/Fail
12V12.218V12.097V0.99%Pass
5V5.088V5.022V1.30%Pass
3.3V3.299V3.169V3.94%Pass
5VSB4.945V4.884V1.23%Pass

Advanced Transient Response at 50% – 10ms

VoltageBeforeAfterChangePass/Fail
12V12.223V12.099V1.01%Pass
5V5.107V5.048V1.16%Pass
3.3V3.300V3.169V3.97%Pass
5VSB4.945V4.882V1.27%Pass

VoltageBeforeAfterChangePass/Fail
12V12.218V12.097V0.99%Pass
5V5.088V5.022V1.30%Pass
3.3V3.299V3.169V3.94%Pass
5VSB4.945V4.884V1.23%Pass

Advanced Transient Response at 50% – 1ms

VoltageBeforeAfterChangePass/Fail
12V12.225V12.103V1.00%Pass
5V5.108V5.055V1.04%Pass
3.3V3.300V3.176V3.76%Pass
5VSB4.945V4.881V1.29%Pass
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

Transient response on this PSU is tight at 12V and 5V. While it's good enough at 3.3V,  we would like to see a less than 3% deviation in this rail. 

Turn-On Transient Tests

In the next set of tests, we measured the PSU's response in simpler transient load scenarios—during its power-on phase. Ideally, we don't want to see any voltage overshoots or spikes since those put a lot of stress on the DC-DC converters of installed components.

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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

The turn-on transient results are perfectly acceptable here. Voltage levels on both rails ramp up smoothly, without any steps, voltage drops, or spikes. 

Power Supply Timing Tests

There are several signals generated by a power supply, which need to be within specified (by the ATX spec) ranges. If they are not, there can be compatibility issues with other system parts, especially mainboards. A PSU's Power-on time (T1) has to be lower than 150ms and the PWR_OK delay (T3) has be within 100 to 150ms, so that it can be compatible with the Alternative Sleep Mode.

PSU Timings Table
T1 (Power-on time) & T3 (PWR_OK delay)
LoadT1T3
20%54ms127ms
100%54ms127ms
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

PSU Timing Charts

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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

The Cooler Mast V750 Gold V2's PWR_OK delay is within the 100-150ms region, so the PSU supports the alternative sleep mode recommended by the ATX spec.

Ripple Measurements

Ripple represents the AC fluctuations (periodic) and noise (random) found in a PSU's DC rails. This phenomenon significantly decreases a PSU capacitors' lifespan because it causes them to run hotter. A 10-degree Celsius increase can cut into a cap's useful life by 50%. Ripple also plays an important role in overall system stability, especially when overclocking is involved.

The ripple limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load7.3 mV5.9 mV6.9 mV10.8 mVPass
20% Load10.0 mV5.8 mV6.4 mV5.3 mVPass
30% Load12.0 mV6.8 mV7.4 mV7.3 mVPass
40% Load8.2 mV6.1 mV6.5 mV6.8 mVPass
50% Load8.2 mV6.7 mV6.9 mV6.8 mVPass
60% Load7.8 mV7.1 mV7.1 mV7.4 mVPass
70% Load13.3 mV8.9 mV9.2 mV9.2 mVPass
80% Load9.1 mV7.9 mV9.4 mV8.4 mVPass
90% Load13.7 mV9.3 mV11.1 mV10.2 mVPass
100% Load13.9 mV10.4 mV12.0 mV12.8 mVPass
110% Load14.4 mV10.7 mV12.2 mV12.5 mVPass
Crossload 115.1 mV8.7 mV11.0 mV6.1 mVPass
Crossload 213.5 mV8.7 mV9.1 mV6.6 mVPass
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

This PSU's ripple suppression is great on all rails. 

Ripple At Full Load

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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

Ripple At 110% Load

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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

Ripple At Cross-Load 1

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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

Ripple At Cross-Load 2

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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)
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Cooler Master V750 Gold V2

(Image credit: Tom's Hardware)

EMC Pre-Compliance Testing – Average & Quasi-Peak EMI Detector Results

Electromagnetic Compatibility (EMC) is the ability of a device to operate properly in its environment without disrupting the proper operation of other nearby devices.

Electromagnetic Interference (EMI) stands for the electromagnetic energy a device emits, and it can cause problems in other nearby devices if too high. For example, it can be the cause of increased static noise in your headphones or/and speakers.

(Image credit: Tom's Hardware)

EMI emissions were low with both detectors we used (Average and Peak). 

MORE: Best Power Supplies

MORE: How We Test Power Supplies

MORE: All Power Supply Content

Aris Mpitziopoulos
Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.
  • helper800
    A good Cooler Master branded PSU? Wow good on CM to find a good manufacturer. On a side-note what determines whether a product gets an editor's choice award from Toms? Aris seemed pretty happy with the PSU. Lets hope CM keeps using manufacturers that use modern PSU platforms.
    Reply
  • jayjr1105
    Great review. nice to see another OEM with 10 year warranty worthy build quality and parts.

    Any plans on doing some of the very affordable Superflower Leadex III units?
    Reply
  • CharlotteAbbe
    Yes best product Cooler Master V750 Gold V2 as per my experience.
    Reply