Chieftec Polaris 1050 W Review 2

Chieftec Polaris 1050 W Review



Chieftec Logo

We would like to thank Chieftec for supplying the review sample.

I already reviewed the Polaris model with 750 W maximum power output, so when Chieftec offered me the 1050 W version, I was curious what more is on offer besides increased power output. The OEM remains High Power. To be more specific, Chieftec used the High Power HP1-H1050GD-F14C model as a base for the Polaris 1050 unit. This platform focuses on a high performance per dollar ratio rather than pure performance. On the 80 PLUS scale, the Polaris 1050 is rated as Gold, while Cybenetics gave it its Platinum efficiency and Cybenetics Standard S++ noise ratings, the latter of which denotes 30–35 dBA average noise output.

This is a fully modular PSU with enough connectors to deliver its power smoothly. Moreover, it uses a fluid dynamic bearing fan, which has the short warranty look odd. Most manufacturers provide at least five years, some even ten or twelve, as with the Seasonic Prime models, while Chieftec only offers two years for all their PSU models. At €125 including VAT, pricing is reasonable at least. The downside is that you won't find any Chieftec products in the US, which is a shame since the aggressive pricing schemes would make their products a good option for users in need of a strong power supply.


Chieftec Polaris 1050W
Features & Specifications
Max. DC Output1050 W
Efficiency (230V)80 PLUS Gold, Cybenetics Platinum (91%–93%)
NoiseCybenetics Standard+ (35–40 dBA)
ModularYes (fully)
Intel C6/C7 Power State SupportYes
Operating Temperature0–50 °C
ProtectionsOver Voltage Protection
Under Voltage Protection
Over Power Protection
Over Temperature Protection
Over Current Protection
Short Circuit Protection
Cooling135mm fluid dynamic bearing fan
(Globe Fan S1352512HH)
Semi-Passive OperationYes
Dimensions (W x H x D)150 x 85 x 160 mm
Weight1.89 kg (4.17 lb)
ComplianceATX12V v2.53, EPS 2.92
Warranty2 years
Price at Time of Review (excl. VAT)€106
Chieftec Polaris 1050W
Power Specifications
Rail3.3 V5 V12 V5 VSB-12 V
Max. Power22 A22 A87.5 A3 A0.3 A
120 W1050 W15 W3.6 W
Total Max. Power1050 W


The box is the same as for the 850 W and 1050 W models, and at its face is a photo of the PSU with its modular panel exposed, as well as two small badges for the Gold efficiency and fully modular cable design. The power specifications and connector count information are on the back of the box.

Protection inside the box is good, and it is always nice to find a pouch for the modular cables. Besides the necessary cables, the bundle includes the user's manual and fixing bolts. Zip ties or Velcro straps have not been included.

As with most PSUs, there is nothing innovative about the exterior design. However, what matters the most is what is inside.

On the two sides, we find "Polaris" stickers. The power specifications label is on the bottom of the unit.

The modular panel has eleven sockets, two for the 24-pin ATX connector, four for the peripheral cables, two for the EPS, and three for the PCIe cables. The EPS and PCIe sockets are not compatible, so you cannot connect an EPS cable to a PCIe socket or vice versa.

The fan grille does not restrict airflow. While the center badge is quite large, it won't restrict airflow significantly, either.

Cables and Connectors

Modular Cables
DescriptionCable CountConnector Count (Total)GaugeIn-Cable Capacitors
ATX connector 20+4 pin (650 mm)1118AWGNo
4+4 pin EPS12V (660 mm)2216AWGNo
6+2 pin PCIe (600 mm+105 mm)3616-18AWGNo
SATA (560 mm+105 mm+105 mm+105 mm)31218AWGNo
4-pin Molex (550 mm+100 mm+100 mm+100 mm)1418AWGNo
AC Power Cord (1380 mm) - C13 coupler1118AWGNo

The cables are long enough, and the EPS ones use thicker AWG16 gauges for lower voltage drops. The same goes for the PCIe cables up to the first connector. It would have been nice to see dedicated PCIe cables, but you could also just use one connector on each.

There are enough SATA and 4-pin Molex connectors, and there is no Berg connector or adapter, which is rarely used nowadays. I would like to see the peripheral connectors situated further apart, especially the 4-pin Molex ones.

Component Analysis

Before reading this page, we strongly suggest a look at this article, which will help you better understand the insides of a PSU.

Chieftec Polaris 1050W Parts Description
General Data
Manufacturer (OEM)High Power
PCB TypeDouble-Sided
Primary Side
Transient Filter4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x MPS HF81 (Discharge IC)
Bridge Rectifier(s)2x HY GBU1506L (600 V, 15 A @ 100 °C)
Inrush Current ProtectionNTC Thermistor & Relay
APFC MOSFETs2x Infineon IPW60R120P7 (600 V, 16 A @ 100 °C, Rds (on): 0.120 ohm)
APFC Boost Diode1x CREE C3D10060A (600 V, 10 A @ 152 °C)
Bulk Cap(s)2x Nichicon (400 V, 680 uF each or 1,360 uF combined, 2,000 h @ 105 °C, GG)
Main Switchers2x Infineon IPA60R120P7 (600 V, 16 A @ 100 °C, Rds (on): 0.12 ohm)
APFC ControllerInfineon ICE3PCS01G
Switching ControllerChampion CM6901X
TopologyPrimary Side: APFC, half-bridge & LLC converter
Secondary Side: synchronous rectification & DC-DC converters
Secondary Side
+12 V MOSFETs4x Toshiba TPHR8504PL (40 V, 150 A, Rds (on): 0.85 mOhm)
+5 V & +3.3 VDC-DC Converters:
5x Vishay SiRA12BDP (30 V, 59 A @ 70 °C, Rds (on): 4.3 mOhm)
PWM Controllers:
Filtering Capacitors

10x Teapo (2–3,000 h @ 105 °C, SC),
1x Teapo (2,000 h @ 105 °C, SH)
1x Nippon Chemi-Con (4–10,000 h @ 105 °C, KY),

16x Teapo

Supervisor ICWeltrend WT2527RA (OCP, OVP, UVP, SCP, PG)
Fan ControllerSTC STC15W408AS
Fan ModelGlobe Fan RL4Z S1352512HH (135 mm, 12 V, 0.45 A, fluid dynamic bearing fan)
5VSB Circuit
Rectifier(s)1x IPS ITA04N65R FET (650 V, 4 A, Rds (on): 2.8 ohm) &
1x 45R15C
Standby PWM ControllerSi-Trend SI8016HSP8
Rectifier1x KEC KIA7912PI (-12 V, 1 A)

Ideally, the modular panel would have been connected to the main PCB through bus bars instead of cables, for which energy losses are higher, especially under high loads. Moreover, these cables block airflow on the secondary side, reminding me of older designs. The heatsink on the primary side is quite large since it hosts the bridge rectifiers, most of the APFC converter's parts, and the main FETs. The heat sinks on the secondary side, on the other hand, are small since the +12 V FETs are installed on the PCB's solder side.

The transient/EMI filter stages have all the necessary parts, offering decent EMI suppression on incoming and outgoing emissions.

A metal oxide varistor (MOV) handles voltage surges, while an NTC thermistor and relay combination suppresses large inrush currents.

The bridge rectifiers are bolted to the primary heatsink, so they can handle up to 15 A each, at 100 °C.

The APFC converter uses two Infineon FETs and a single CREE boost diode that is quite strong. The bulk caps are by Nichicon, and their combined total capacity is 1360 uF.

The APFC controller is an Infineon ICE3PCS01G, so I expect good PF readings since Infineon ICs perform better than corresponding Champion ones in this section.

The main FETs are two Infineon IPA60R120P7s installed in a half-bridge topology. An LLC resonant converter is also used to boost efficiency. The resonant controller is the omnipresent Champion CM6901X.

The unit's main transformer is large enough to cope with the load.

The FETs regulating the +12 V rail are installed on the solder side of the main PCB. The heatsinks above them lower their operating temperatures.

Two DC-DC converters generate the minor rails. They use five Vishay FETs, and their joint PWM controller is an Anpec APW7159C.

Most electrolytic caps are by Teapo and belong to the cheap SC line, which I would avoid exposing to stressful conditions because of their short lifetime. If you operate the PSU at normal temperatures, these will last for quite a while, but the higher the operating temperatures, the shorter their lifespan. Besides electrolytic caps, I also found sixteen Teapo polymer caps.

The 5VSB circuit uses an IPS FET on its primary side and a 45R15C SBR on its secondary side. The standby PWM controller is a Si-Trend SI8016HSP8.


The supervisor IC is a Weltrend WT2527RA, which provides all essential protection features. It is on the same board as the APFC controller.

The Teapo polymer caps on the modular board improve ripple suppression on all rails.

Soldering quality is good.

The cooling fan is by Globe Fan and uses a fluid dynamic bearing, so it is of good quality. The STC STC15W408AS looks to be the fan controller.

Test Setup

Our Patreon Silver Supporters can read articles in single-page format.
Discuss(2 Comments)
May 19th, 2022 20:59 EDT change timezone

New Forum Posts

Popular Reviews

Controversial News Posts