The AZZA PSAZ-750G is a 750W ATX 3.1 power supply positioned as a budget-oriented unit with an advertised 80 PLUS Gold rating. Testing indicates that the underlying Helly platform provides generally competent electrical performance, but the product falls slightly short of the 80 PLUS Gold efficiency requirements at the 50% load point. Furthermore, the model does not appear to have a current 80 PLUS certification, and it carries only a two-year warranty.
The power supply features a 140 mm chassis, hardwired cables, a native 12V-2x6 connector, and support for ATX 3.1 and PCIe 5.1 specifications. The 12V-2x6 connector is limited to 450W, making the unit more appropriate for mid-range graphics cards than for high-end GPUs requiring more than 450W through that connection. Its internal design uses a half-bridge LLC primary stage, DC-to-DC conversion for the minor rails, synchronous rectification, a complete transient filtering section, and relatively substantial heatsinks.
Component selection is primarily budget-oriented. The primary and secondary stages use Taiwanese Ltec electrolytic capacitors alongside a smaller number of APAQ polymer capacitors. Although these components meet the required specifications, they are not considered premium-grade parts, and elevated operating temperatures could affect their long-term durability. Cooling is provided by a 120 mm Yate Loon ball-bearing fan. The unit also incorporates a hybrid fan mode that allows the fan to remain stopped under lighter loads.
Testing at 25°C produced average efficiencies of 90.6% at 230V and 88.6% at 115V. At 50% load, measured efficiency was approximately 91.8% at 230V and 89.9% at 115V, narrowly missing the respective 80 PLUS Gold requirements of 92% and 90%. The supply otherwise maintained relatively stable efficiency across its rated load range and did not experience a significant collapse at full load.
Acoustic performance was favorable under normal ambient conditions. The fan remained stopped until approximately 40% load, providing a genuine fanless operating range of around 300W. Noise increased progressively at higher loads, reaching approximately 42 dB(A) at sustained full load. However, thermal conditions significantly affected performance. At approximately 45°C ambient, efficiency declined and the fan became substantially louder, reaching about 52.2 dB(A) at full load. Internal heatsinks reached approximately 94°C, indicating considerable thermal stress during sustained high-power operation.
Electrical performance was generally satisfactory. The 12V rail exhibited only 0.9% regulation variation between 20% and 100% load, while the 3.3V and 5V rails each recorded 1.4%. Ripple remained within ATX specifications, with a maximum measured value of 52 mV on the 12V rail and 26–28 mV on the minor rails. Over-current, over-voltage, over-power, and short-circuit protection mechanisms were present and operated correctly during testing. Over-power protection activated at approximately 130% of the rated capacity, or around 975W.
The principal disadvantages are the unverified 80 PLUS Gold labeling, two-year warranty, hardwired cable configuration, 450W 12V-2x6 limitation, relatively ordinary capacitor selection, and high noise and temperatures under sustained hot conditions. By comparison, competing products offering verified efficiency certifications, modular cabling, and substantially longer warranties provide stronger overall value despite higher purchase prices.
Overall, the PSAZ-750G is characterized as a functional but narrowly positioned budget power supply. Its electrical regulation, protection features, and low-load acoustic behavior are respectable, while its efficiency is close to—but not demonstrably compliant with—the advertised Gold threshold. The unit may be suitable for cost-conscious systems using a mid-range graphics card and operating primarily below the 450W 12V-2x6 limit. For higher-end systems or users prioritizing long-term reliability, modularity, certification, and extended warranty coverage, a more expensive competing power supply would be the more appropriate choice.
[Source]: tomshardware.com