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Antec High Current Gamer 850W PSU Review: Compact And Powerful

Teardown & Component Analysis

Before proceeding with this page we strongly encourage you to a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss.

General Data
Manufacturer (OEM)Seasonic
Platform ModelFX
Primary Side
Transient Filter4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x CM02X
Inrush ProtectionNTC thermistor & diode
Bridge Rectifier(s)2x GBU1508 (800V, 15A @ 100°C)
APFC MOSFETs2x Infineon IPW50R190CE (550V, 15.7A @ 100°C, 0.19Ω)
APFC Boost Diode1x STMicroelectronics STTH8S06D (600V, 8A @ 125°C)
Hold-up Cap(s)1x Nichicon (400V, 680uF, 2000h @ 105°C, GG)
Main Switchers4x UTC GPT13N50DG (500V, 13A @ 100°C, 0.49Ω)
APFC ControllerChampion CM6500UNX
Resonant ControllerChampion CM6901T6X
TopologyPrimary side: Full-bridge & LLC resonant controller Secondary side: Synchronous rectification & DC-DC converters
Secondary Side
+12V MOSFETs4x Nexperia PSMN2R6-40YS (40V, 100A @ 25°C, 2.8mΩ)
5V & 3.3VDC-DC Converters: 6x Infineon BSC0906NS (30V, 40A @ 100°C, 4.5mΩ) PWM Controller: APW7159
Filtering CapacitorsElectrolytics: Chemi-Con (1-5000 @ 105°C, KZE), Chemi-Con (4-10,000 @ 105°C, KY), 2x Nichicon (2-5000 @ 105°C, HD), 1x Rubycon (3-6000 @ 105°C,YXG) Polymers: Chemi-Con, FPCAP
Supervisor ICWeltrend WT7527V (OVP, UVP, OCP, SCP, PG)
Fan ModelHong Hua HA1225H12F-Z (120mm, 12V, 0.58A, 2200 RPM, fluid dynamic bearing)
5VSB Circuit
Standby PWM ControllerExcelliance EM8569

The HCG850's internals are nearly identical to what you'd find in Seasonic's Focus Plus Gold. We only spotted a few differences in the bridge rectifiers, along with some of the secondary side's capacitors. Instead of a pair of large Nippon Chemi-Con W caps, Antec's version employs two Nichicon caps. More than likely, this is due to a parts shortage, though the Nichicon caps are similarly high-quality. In addition to the Chemi-Con polymer capacitors, we also find several FPCAP polymer caps.

While this PSU's platform performs well, it's not particularly quiet. The PCB is small, and there isn't much space between the components for optimal airflow. On top of that, Antec provides a 10-year warranty, so the company has to make sure it doesn't die prematurely under tough conditions. The result is an aggressive fan profile. In our opinion, if Antec insisted on a 135mm fan, the HCG850's acoustics would have been easier to control.

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The album above includes photos showing the HCG850's major parts.

The video below shows the HCG850’s internals.

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Aris Mpitziopoulos
Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.