NZXT E Series 650 W Review 10

NZXT E Series 650 W Review

CAM Software »



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 Output650W
Efficiency80 PLUS Gold
NoiseLAMBDA-S+ (35-40 dB[A])
Intel C6/C7 Power State Support
Operating Temperature0°C - 50°C
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Power Protection
Over Temperature Protection
Over Current Protection
Short Circuit Protection
Cooling120 mm Fluid Dynamic Bearing Fan (HA1225H12SF-Z)
Semi-passive Operation✓ (selectable in the software)
Dimensions152 mm (W) x 87 mm (H) x 152 mm (D)
Weight1.57 kg (3.46 lb)
ComplianceATX12V v2.31, EPS 2.92
Warranty10 years
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
Max. Power20A20A54A3A0.3A
Total Max. Power650W

Cables and Connectors, Power Distribution

Modular Cables
DescriptionCable CountConnector Count (Total)GaugeIn Cable Capacitors
ATX connector 20+4 pin (610 mm)1118-22AWGYes
4+4 pin EPS12V (650 mm)1118AWGYes
6+2 pin PCIe (680 mm+70 mm)2418AWGYes
SATA (500 mm+100 mm+100 mm+100 mm)2818AWGNo
4-pin Molex (500 mm+100 mm+100 mm)2618AWGNo
USB Cable (580 mm)1128AWGNo
AC Power Cord (1400 mm) - C13 coupler1116AWG-

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.

Component Analysis

General Data

Manufacturer (OEM)


Platform Model


Primary Side

Transient Filter

4x Y caps, 2x X caps, 2x CM chokes, 1x MOV (S14K300) , 1x Champion CM02X

Inrush Protection

NTC Thermistor & Diode

Bridge Rectifier(s)

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)

Hold-up Cap(s)

1x Nichicon (400V, 470 uF, 2000h @ 105°C, GG)

Main Switchers

4x UTC GPT13N50DG (500V, 13A @ 100°C, 0.49mOhm)

APFC Controller

Champion CM6500UNX

Resonant Controller

Champion CM6901T6X & Texas Instruments UCD3138064A

USB Controller

Microchip PIC16F1455


Primary side: Full-Bridge & LLC Resonant Controller
Secondary side: Synchronous Rectification & DC-DC converters

Secondary Side


2x FETs

5 V & 3.3 V

DC-DC Converters: 6x Infineon BSC0906NS (30V, 40A @ 100°C, 4.5 mOhm)
PWM Controller: APW7159

Filtering Capacitors

Electrolytics: Nichicon (4-10,000 @ 105°C, HE), Chemi-Con (4-10,000 @ 105°C, KY), Chemi-Con (105°C, W)
Polymers: FPCAP

Supervisor IC

Weltrend WT7527V (OVP, UVP, OCP, SCP, PG)

Fan Model

Hong Hua HA1225H12SF-Z (120 mm, 12 V, 0.58 A, 2200 RPM, Fluid Dynamic Bearing)

5VSB Circuit

Standby PWM Controller

Excelliance EM8569


1x MBR1045ULPS SBR (45V, 10A @ 90°C)

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May 26th, 2022 06:50 EDT change timezone

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