Gigabyte GP-P750GM 750 W Review - With an Explosive Attitude 37

Gigabyte GP-P750GM 750 W Review - With an Explosive Attitude


Value and Conclusion

  • The Gigabyte GP-P750GM 750 W retails for $119.99.
  • Delivered full power at 47°C
  • Efficient platform
  • Tight load regulation at +12 V
  • Good soldering quality
  • Good noise output
  • Fully modular
  • Two EPS and four PCIe connectors
  • Compact dimensions
  • Semi-passive operation—however, it cannot be deactivated
  • 5-year warranty
  • My sample ceased to work during OPP evaluation
  • Over power protection is not properly set
  • Lousy transient response at +12 V and 3.3 V
  • Low-quality FETs on the primary side
  • Unknown caps on the secondary side
  • They advertise an HDB fan, but I found a rifle bearing one instead
  • Very low efficiency with 2% load
  • Low efficiency at 5VSB
  • Hold up time below 17 ms
  • Power ok signal not accurate
  • EPS cable should at least be 650 mm long
  • Short distance between peripheral connectors
  • Not fully compatible with the newest ATX specification (v2.52)
Contrary to the Aorus PSU line, which was surprisingly good, this one is a disappointment. Let's start with the positives: high efficiency, quiet operation, compact dimensions, tight +12 V load regulations, and ripple suppression that is good enough. The fully modular cable design and affordable price are two major advantages as well, along with the fact that Gigabyte is brave enough to offer a five-year warranty.

Time to talk about the negatives, of which there are quite many, which you will have probably already noticed by looking at our list of cons. For starters, my sample died during the over power evaluation, which is a great shame. The primary switching FETs blew up with a hell of a bang. The thing literally exploded, and thankfully, I had it inside a sturdy wooden box or it might have damaged something else in my lab. Seeing a supposedly good PSU die like this is not cool at all. Protection features are there to prevent such incidents. Of course, I sent Gigabyte an email with all of my findings and spoke to the power R&D supervisor, who informed me that they checked five samples which all survived their OPP evaluation test. What left a negative impression on me was that they didn't bother asking for my sample to be sent back to check on what went wrong. With such a colossal failure on hand, the respective brand usually immediately asks for the sample to be returned for a closer examination to find the source of the problem. You might test dozens of samples at the factory, and while all of those pass the tests, what matters the most is finding those with an actual problem for a thorough examination in an attempt to figure out why they broke down. Moving on to the other cons, it uses unknown FETs and caps—I don't feel confident about their reliability over the long run. It is also a huge bummer to see a PSU with an inaccurate power ok signal. Moreover, although the platform's efficiency is high enough at normal loads, this is not the case with very light loads of 2% of the maximum-rated capacity, as well as light loads between 20–80 W. To make matters worse, the 5VSB rail is not efficient, either.

I would also like to see longer EPS cables and dedicated PCIe cables. Inexperienced users may try connecting their super-expensive Ampere or Big Navi graphics cards with a single PCIe cable, which would lead to unpleasant results. At best, the PCIe cable's gauges will melt, the secondary side will short, and the PSU will shut down. At worst, you will damage both the PSU and the graphics card, or even the whole system.

Performance-wise, this PSU doesn't manage to stand out from the crowd. Transient response on the +12 V rail is poor even though transient loads are a common scenario, making this an incredibly important area of performance. Voltage drops on this rail with transient loads need to be low. All in all, I cannot recommend this power supply despite its decent price. You better spend a little more and get a similarly specced power supply from Corsair, XPG, Thermaltake, Seasonic, or Cooler Master. I hope Gigabyte takes my comments seriously and improves this product.
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May 23rd, 2022 06:53 EDT change timezone

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