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NZXT C750 Power Supply Review


Introduction:

NZXT is a well-known brand when it comes to chassis, coolers, fans, etc. The power supply is something we usually do not associate NZXT with. Well, that should change by the time you are done reading this article. NZXT forayed into the power supply or PSU space a couple of years ago and keeping in line with their philosophy of quality first, they partnered with Seasonic as their OEM. Seasonic needs no introduction as far as PSU is concerned.

NZXT was kind enough to send across their 750W variant for us to check out. It is the C750 Model to be specific. Let’s check out this unit!


Unboxing:
Braided black cables look neat and tidy.
Zero fan mode allows for quiet operation provided the PSU internal temperatures are under control.
Testing Methodology :

We shall be keeping this review very simple. We shall be using an Nvidia Geforce RTX 3090 24GB GPU and Intel Core i9 11900K Processor and simulate a real-world scenario with maximum load posed from the GPU as well as the CPU at the same time.

Test System :
  • Intel Core i9 11900K

  • ASRock Z590 OC Formula

  • Thermaltake Toughram XG RGB 4000MHz CL19 8GB x 2 DDR4

  • Astra KD350X 512GB PCIe Gen3 M.2 NVMe SSD

  • Nvidia Geforce RTX 3090 24GB Founder’s Edition

  • NZXT C750 80+ Gold Certified Full Modular PSU

  • Custom Water Cooling for the CPU

We used AIDA64 to stress the CPU and GPU both at the same time using their Stress Test. Voltage and current draw for CPU and GPU were monitored with the help of digital Multimeter and Ammeter for real-time readings and also software monitoring through HWINFO64 to ensure our readings were accurate. The stress test was run for almost 1.5 hrs to monitor how the PSU handled sustained load over a longer period of time.

Under stress test, the CPU was pulling almost 19A current and therefore the resulting power draw was around 230W.
The GPU was pulling almost 24A current, meaning the power draw was around 290W.
The software monitoring shows that the CPU was pulling around 228W of power whereas the GPU was pulling around 340W of power.
Observations & Conclusions:
  • The overall build quality of the unit is pretty solid. The sheet metal used for the casing is thick enough to give it a robust feel and doesn’t feel squishy like is common with cheap PSU units.

  • The unit comes with braided black cables which make cable management much easier and giving the build a neat and tidy look.

  • Since this unit is built by Seasonic, expectations were already high as far as performance was concerned.

  • The readings with Multimeter and Ammeter and software readings tell us that the cumulative load posed was around 570W just for CPU and GPU. If we consider around 50W for SSD, HDD, Fans, AIO, etc. that comes to around 620W which is just above 80% duty cycle of the rated power of this PSU.

  • During our testing, the +12V voltage rail remained steady throughout without even the slightest of fluctuations when checked with Multimeter. Speaks a lot about the quality of this unit.

  • After 1.5 hours of rigorous testing, the body of the PSU became slightly warm but nothing to be concerned about.

Good build quality, steady and consistent performance, 10 Years warranty, price of approximately 10,000 INR there isn’t much to complain about and hence wins a well-deserved Gold Award from us!



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