Articles: Cases/PSU

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Cross-Load Stability

The different HALE82 products were comparable in this test, too. We will describe the highest-wattage model, mentioning the others where necessary.

The +12V voltage is almost perfect with each PSU. It is within 1% of the required level at low and medium loads and within 2% at high loads.

The +3.3V voltage is just slightly worse, deflecting by 3% from the required level (the highest-wattage model even has a small area with 4% deflection). On the other hand, this voltage is going to be within 2% of 3.3 volts under real-life loads.

It is the +5V line that turns out to be the weakest one in each PSU. Its voltage deflects by 5% with the two higher-wattage HALE82 models. On the other hand, the deflection is only 2% in the typical load range.

As opposed to its more advanced cousins, the 650-watt unit is as stable with +5V as with the other voltages. The deflection is not higher than 3%. It is even as low as 2% in the typical load range.

Output Voltage Ripple

The high-frequency voltage ripple is very weak with each PSU. Even the occasional spikes do not go out of permissible limits. The PSU platform employed in the HALE82 series is better than Seasonic’s previous platform (S12-II and M12-II) in this respect as the latter PSUs allowed voltage spikes to shoot above an acceptable level.

The voltage ripple is also low at the double frequency of the power mains. We can only note a wave on the +12V rail.

Temperature and Noise

The HALE82 PSUs are all cooled by the same fan and have the same fan regulation algorithm. Let’s examine it using the highest-wattage model.

The fan is a 7-blade ADDA (AD1212UB-A70GL; 2500 RPM; 120 mm). The impeller is partially blocked with a piece of plastic to optimize air flows.

The fan starts out at 1080 RPM in each PSU and accelerates rapidly from a load of 250 watts onwards.

Each fan reaches its peak speed of 2300 RPM at a load of 650 watts and retains it thereafter.

Thus, these PSUs are not quiet. The fan is audible even at the minimum 1080 RPM (its ball bearings are inferior to sleeve or fluid dynamic bearings in terms of noisiness, even though last longer) whereas the maximum 2300 RPM is downright uncomfortable.

Well, the manufacturer doesn’t actually promise these PSUs to be quiet:

The specified noise range of 25 to 40 dB doesn’t imply silence. The only thing the manufacturer doesn’t get right is that the fan speed starts to increase much sooner in reality than in the picture above.

We must acknowledge that the fan regulation algorithm is appropriate: the temperature difference between the incoming and outgoing air increases slowly as the fan accelerates. Perhaps the manufacturer just overdid it a little, trying to keep PSU components as cool as possible. Yes, that’s good for the service life of the PSU, but the latter would be far more comfortable acoustically if its fan weren’t set up that aggressively.

Efficiency and Power Factor

The three HALE82 PSUs showed almost identical (and high) results in this test, meeting the 80 PLUS Bronze requirements by some margin. Let’s discuss the senior model again.

The power factor is typical of a PSU equipped with active power factor correction.

The HALE82-850-M was 85.2%, 87.7% and 84.4% efficient at the three reference loads (20%, 50% and 100% of the full output power). Its peak efficiency was 88.1% at a load of 337 watts.

The other two HALE82 units were somewhat more efficient at full load (85 to 85.3%) and had their peak efficiency at a load of below 300 watts. Otherwise, they showed almost the same results in this test as the senior model.

Standby Source

The three HALE82 series PSUs deliver the same performance once again.

The standby source copes with its job, keeping its voltage within 2% of the required level.


NZXT’s HALE82 series consists of modular PSUs with good electrical parameters. Unfortunately, they are not good in terms of noisiness. Their fan is audible even at low loads and becomes downright uncomfortable at high ones.

If it were not for the noise, the HALE82 series would be an excellent choice in the midrange category. They can only be recommended to users who don’t care about how noisy their computers are.

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