Both models were good in this test, keeping two out of the three main voltages within 3% of the required levels in the typical load range.
The difference is that the +12V voltage is the most unstable one in the 750W model. It deflects by 5% at high loads on the +12V rail and up to 4% at loads below 150 watts.
In the 1000W model the +5V voltage deflects more than the others. It does so at near-maximum loads.
The voltages are within 2-3% of the required levels in the typical load range. That’s quite acceptable.
Output Voltage Ripple
The two PSUs are similar in this test.
We can clearly see high-frequency voltage ripple, but it is not as strong as to become a problem.
The same goes for the low-frequency voltage ripple.
Temperature and Noise
Each HALE90 PSU is cooled with an NZXT-branded 9-blade 140mm fan which is white like the PSUs themselves. The impeller is partially covered with a piece of transparent plastic to optimize air flows.
Although the PSUs and their cooling systems are very similar, their fans behaved differently:
The 750W model’s fan started out at 875 RPM and kept the same speed irrespective of load (the peak speed was only 920 RPM). Thus, this PSU is virtually silent at any load.
The fan of the HALE90-1000-M model started out at a lower speed and maintained it until a load of 650 watts. Then the fan accelerated in a linear manner but didn’t reach even 1200 RPM. That’s very quiet for a PSU of that wattage.
The low noise is achieved at the expense of temperature (the difference between the incoming and outgoing air is 16 to 18°C at full load), but we guess that user’s comfort is far more important.
It’s a shame that the newer HALE82 series doesn’t use the same fan regulation algorithm, especially as high temperatures shouldn’t be a problem for high-quality components installed in the NZXT products.
Efficiency and Power Factor
Like the HALE82 series, the HALE90 PSUs are similar in terms of efficiency.
The HALE90-1000-M is 88.3%, 92% and 87.4% efficient at 20%, 50% and 100% load. It is over 90% efficient through half its load range.
As is typical of many PSUs, the lower-wattage model is more efficient at full load: 88.8% as opposed to 87.4%. Otherwise, they are similar to each other in this test.
The power factor is typical of PSUs with active power factor correction.
The graph is the same for both PSUs:
The standby voltage is somewhat higher than required, but meets the requirements of the industry standard.
NZXT’s HALE90 series meet the 80 PLUS Gold requirements but are not perfect in their electrical parameters. Their voltages might be more stable.
On the other hand, the original exterior design, very low noise level and reasonable pricing coupled with the lack of really serious downsides make them a very good choice.