Page 3 - Physical Look - Inside
As always, we opened up our NZXT HALE82 750W power supply to take a detailed look at what is going on inside. Please note that doing this at home will void your five year warranty with free two way shipping, thanks to the warranty seal NZXT applied over one of the attachment screws. But for the benefit of you, we cracked ours open so you don't need to, haha. There are no user serviceable parts inside.
Disassembling the NZXT HALE82 750W is very straightforward. Simply remove four screws, and you are on your way. Built by renowned manufacturer Seasonic, our photo above shows an overhead view of the its internal components. At first glance, the build quality appears to be excellent, as one would expect from the OEM. Its components are well organized for optimal cooling and reduced heat congestion as well. There are four heatsinks inside the power supply, with all of them finned at the top. Three of them are quite large with a smaller one on the side, as you can see in our photo above.
A quick pull with the top cover off, and we got straight to the internal inspection. The transient filter stage is the first input stage of a computer power supply, so we will take a look at that first. NZXT has done a great job in the past to make sure their power supplies met or exceeded the recommended requirements, and the Seasonic built HALE82 series is certainly no exception. The NZXT HALE82 750W has three ferrite coils, one metal oxide varistor, two metalized polyester X-capacitors, and four ceramic Y-capacitors. That is twice as many X capacitors Y capacitors than recommended. Considering how many modern day PSUs have missing MOVs, I am happy to see it here, as this component is used to stabilize spikes from the AC line.
On the primary side, we can see two Japanese made Nippon Chemi-Con capacitors connected in parallel. Japanese made capacitors are usually what we expect from something in this price range, so this is nothing surprising. Our 750W version of NZXT's HALE82 incorporates one 220µF x 400V and one 330µF x 400V capacitor for a total capacitance equivalence of a single 550µF x 400V capacitor (Remember that values add up when capacitors are hooked up in parallel, unlike resistors). These units are rated at 105c; whereas more value oriented power supplies usually use 85c rated capacitors.
The active PFC circuit featured on the NZXT HALE82 750W uses two LiteOn Semiconductor GBU806 glass passivated bridge rectifiers, and is controlled by a Champion CM6802 PFC/PWM controller combo. At 115V, the maximum rectified forward current capacity with heatsink is 8A for each diode, so you can theoretically pull up to 1840W (8A * 2 diodes * 115V) from the bridge rectifier at 100% efficiency -- of course, this is limited by the fact that it is not 100% efficient, and also neglects the fact that not every component in the system are able to keep up. Three Fairchild Semiconductor FDP18N50 MOFSET transistors are used on the active PFC circuit of the NZXT HALE82 750W power supply. Two Infineon SPP20N60C3 power transistors are used in the switching section. Each Fairchild Semiconductor FDP18N50 MOFSET can deliver up to 10.8A at 100 degrees Celsius continuously. These transistors present a maximum resistance of 0.265 ohm when turned on; with a typical resistance of 0.220 ohm according to the manufacturer's data sheet. The Infineon SPP20N60C3 MOSFETs can deliver up to 13.1A at 100 degrees Celsius continuously; with a maximum resistance of 0.19 ohm, and a typical resistance of 0.16 ohm. This on characteristic is called Static Drain-Source On-Resistance, or commonly abbreviated as RDS(on). The more efficient the component is, the lower the RDS(on) value, since it wastes less power with lower resistance.
On the secondary side, we can see more Nippon Chemi-Con 105c capacitors. I am pleasantly surprised by this, as most companies usually resort to cheaper Taiwanese 85c units for secondary capacitors. As with modern high efficiency power supplies, all rectifiers produces the +12V out -- while the +5V and +3.3V outputs are generated from the +12V output using a DC to DC converter within the power supply unit.
The DC-to-DC converter has one ANPEC APW7159 synchronous buck PWM controller and six Diodes Inc. SBR30A50CT rectifiers for its rectification and DC +12V output process. The SBR30A50CT's maximum drain current is 15A at 25c, peak forward surge current of 260A at 25c, and maximum forward voltage drop of 0.55V. The DC to DC converter process is executed on a vertically oriented PCB behind the heatsink on the secondary side with seven Infineon chips. Meanwhile, a Silicon Touch PS223 IC provides over/under current and over/under voltage protection.
At the back, we have a small daughterboard covering the a portion of the rear panel for the modular cable sockets. It is connected to the mainboard by a series of wires after the secondary stage, as shown in our past couple of photos. The output connector configuration can be seen on the previous page. Overall, the internal build quality of NZXT's HALE82 750W power supply is everything you can expect from a Seasonic built unit -- excellent. Components are arranged beautifully for optimal cooling, and solder points on its green PCB is pretty clean in general. I would say the Seasonic manufactured NZXT HALE82 750W is a practically flawless product for its class with regards to the selection of components used under the hood.
Lastly, we see a modestly sized 120mm fan that provides cooling to the NZXT HALE82 750W's internal components. It is connected to the mainboard using a 2-pin connector. Although it is not the largest fan you can fit in a standard ATX power supply, an overhead design provides lots of airflow at lower speeds for quiet operation in most cases. ADDA is the fan OEM, with AD1212UB-A70GL as the model number, as shown in our photo above. Further research indicates the AD1212UB-A70GL is a ball bearing fan specified at 0.50A with a maximum of speed of 2500 rpm. The rated airflow is 98.97 CFM and 43.3 Pa static pressure at 43.3 dB of noise. ADDA is known for making relatively quiet fans from our past experience, and being a Seasonic built PSU, one can only have high expectations from the NZXT HALE82 750W in this regard.
1. Introduction, Packaging, Specifications
2. Physical Look - Outside
3. Physical Look - Inside
4. Minor Tests and Conclusion