We would like to thank NZXT for supplying the review sample.
NZXT has again entered the PSU market with the E series consisting of three models with capacities ranging from 500 W to 850 W. These models are based on a modified version of the Seasonic Focus Plus Gold platform, but feature a digital interface, which makes monitoring the PSU through a well-implemented application that provides tons of interesting information possible.
The major downside of NZXT's newest PSU offerings is the production cost, which is clearly reflected in NZXT's asking price. Corresponding Seasonic models are more affordable, which probably makes many wonder why they should pay more for an E series model. The reason could be the software monitoring, which provides lots of monitoring information and brings with it limited control capabilities since users can tune the fan profile and switch between single or multi +12V rail operation. While it also looks nice externally, looks are not important when it comes to a power supply tucked into a chassis.
|NZXT NP-1PM-E650A Features & Specifications|
|Max. DC Output||650W|
|Efficiency||80 PLUS Gold|
|Noise||LAMBDA-S+ (35-40 dB[A])|
|Intel C6/C7 Power State Support||✓|
|Operating Temperature||0°C - 50°C|
|Protections||Over Voltage Protection|
Under Voltage Protection
Over Power Protection
Over Temperature Protection
Over Current Protection
Short Circuit Protection
|Cooling||120 mm Fluid Dynamic Bearing Fan (HA1225H12SF-Z)|
|Semi-passive Operation||✓ (selectable in the software)|
|Dimensions||152 mm (W) x 87 mm (H) x 152 mm (D)|
|Weight||1.57 kg (3.46 lb)|
|Compliance||ATX12V v2.31, EPS 2.92|
|Price at Time of Review (excl. VAT)||$109.99|
The efficiency certifications is high enough for both 80 PLUS Gold and Cybenetics, but the noise certification shows that this unit is not among the quietest in the 650 W category. On the contrary, this PSU can easily be called noisy with even its fan profile set to Silent mode. Apparently, the rather small fan doesn't help even though it uses a fluid dynamic bearing since its speed profile isn't tuned properly.
While the semi-passive operation can be deselected, one can only do so in NZXT's CAM application. In our opinion, there should also be an extra switch on the unit's front for that very purpose, and while this PSU is pretty small, the SSR-650FX with the same platform is even smaller.
|NZXT NP-1PM-E650A Power Specs|
|Total Max. Power||650W|
Cables and Connectors, Power Distribution
|Description||Cable Count||Connector Count (Total)||Gauge||In Cable Capacitors|
|ATX connector 20+4 pin (610 mm)||1||1||18-22AWG||Yes|
|4+4 pin EPS12V (650 mm)||1||1||18AWG||Yes|
|6+2 pin PCIe (680 mm+70 mm)||2||4||18AWG||Yes|
|SATA (500 mm+100 mm+100 mm+100 mm)||2||8||18AWG||No|
|4-pin Molex (500 mm+100 mm+100 mm)||2||6||18AWG||No|
|USB Cable (580 mm)||1||1||28AWG||No|
|AC Power Cord (1400 mm) - C13 coupler||1||1||16AWG||-|
The cables are long, but at only 100 mm, the peripheral connectors aren't far enough apart. 150 mm would have been better. Moreover, the ATX, EPS, and PCIe cables feature in-cable capacitors for better ripple suppression. This might improve performance, but makes the cables more rigid, which many users, us included, do not like.
The number of provided connectors looks good with the exception of the single EPS connector. Two EPS connectors would have been better.
NTC Thermistor & Diode
2x GBU1006 (600V, 10A @ 100°C)
2x UTC GPT18N50DG (500V, 18A @ 100°C, 0.265 Ohm)
APFC Boost Diode
1x UTC BYC8-600 (600V, 8A @ 109°C)
1x Nichicon (400V, 470 uF, 2000h @ 105°C, GG)
4x UTC GPT13N50DG (500V, 13A @ 100°C, 0.49mOhm)
Primary side: Full-Bridge & LLC Resonant Controller
5 V & 3.3 V
Weltrend WT7527V (OVP, UVP, OCP, SCP, PG)
Hong Hua HA1225H12SF-Z (120 mm, 12 V, 0.58 A, 2200 RPM, Fluid Dynamic Bearing)
Standby PWM Controller
1x MBR1045ULPS SBR (45V, 10A @ 90°C)
The first time you run NZXT's CAM software, a tour mode guides you through the application.
The utility provides a comprehensive overview of your system.
You can set the PSU's fan to one of four profiles: Fixed, Silent, Performance, and Custom. We selected Silent mode for all of our testing.
There are two tabs here: Regular and Advanced. The Regular tab reports CPU and GPU consumption by monitoring power through the EPS and PCIe cables. The same goes for the peripheral cables. Under the same tab, you'll find power-on time, temperature inside the PSU, and each rail's voltage.
The Advanced tab shows current output on every rail. Extra detail is provided for the +12V rail since it's broken up into CPU, GPU, and Other. Use this interface to enable over-current protection on the EPS and PCIe connectors and configure the triggering point.
Driver and firmware versions are shown on a separate panel.
All other settings are illustrated above. There is even an overlay for the frame rates of your favorite games.
Overall, the CAM software is intuitive, stable, and laid out well. However, it offers lots of options that can sometimes be confusing. A simpler monitoring program would probably be more appealing to mainstream users, although enthusiasts will appreciate all the data CAM provides.
Based on our own measurements, readings through CAM aren't particularly accurate, and there is no efficiency information since the platform apparently doesn't have a circuit for measuring AC power from the wall socket.