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The DeepCool PX850G 850W PSU Review: Less Than Quiet, More Than Capable

The DeepCool PX850G 850W PSU Review: Less Than Quiet, More Than Capable

DeepCool is one of the few veterans in the PC power and cooling components field still active today. The Chinese company was first founded in 1996 and initially produced only coolers and cooling accessories, but quickly diversified into the PC case and power supply unit (PSU) markets. To date, DeepCool has focused almost entirely on PC power and cooling products, with input devices and mouse pads being their latest diversification effort.

Today's review focuses on Deep Cool's PSUs and specifically the PX850G 850W ATX 3.0 PSU, which is currently their most popular power supply. The PX850G is designed to balance all-around performance with reliability and cost, providing ATX 3.0 compliance. It's based on a very popular high-output platform but oddly, DeepCool rated the PX850G for operation up to 40°C.

Deep Cool PX850G
Power Specifications (Rated at 40 °C)
Rail +3.3V +5V +12V +5Vsb -12V
Maximum output 22A 22A 70.8A 3A 0.3A
120W 849.6W 15W 3.6W
TOTAL 850W
80 plus rating to sleep
AC input 100 – 240 VAC, 50 – 60 Hz
MSRP $113

Packaging and bundles

The DeepCool PX850G 850W PSU comes in straightforward packaging, with a minimal cardboard box accented by a decorative ribbon for a bit of flair. The unit is well protected during shipping, enclosed in a nylon bag and surrounded by foam inserts. Key specifications and PSU performance reviews are clearly printed on the back, giving browsing shoppers a quick overview of what to expect from the product.

DeepCool supplies the necessary mounting screws and AC power cable, but also a jump-start adapter and four reusable cable straps for a small extra cost. Inside is a small envelope with documents.

This power supply unit is distinguished by its fully modular design, which allows the separation of all DC power cables, including the 24-pin ATX connector. Cables are black, from their connectors to the wires. All are sleeveless, creating a uniform visual design.

Deep Cool PX850G
Connector type Hardwired Modular
ATX 24 pin 1
EPS 4+4 pin 2
EPS 8 pin
PCI-E 5.0 1
PCI-E 8 pin 3
Sita 8
Molex 4
Floppy.

DeepCool PX850G 850W ATX 3.0 PSU

Physical appearance

The DeepCool PX850G 850W PSU is housed in a chassis that measures 86 mm × 150 mm × 160 mm (H × W × D), making it slightly taller than typical ATX standard dimensions. This size allows the power supply unit to be easily integrated into most tower PC cases, with the only exception being compact and some HTPC/cubic PC case designs. Despite its size, length is a necessary sacrifice for the unit to accommodate its 135mm cooling fan.

DeepCool has focused on the external design of the PX850G 850W PSU, which strikes a balance between aesthetics and functionality. The power supply unit sports a satin black finish, with the company's logo discreetly punched on either side of the chassis. The integrated fan finger guard features a distinctive square design, which differentiates it from typical round guards. An information sticker, detailing the PSU's specifications and certifications, is located on top of the unit.

Typically, the power switch and AC input receptacle can be found on the back, along with a push button that can be used to turn off hybrid fan mode and force the unit's fan to stay on at all times. The front is dedicated to the modular connectors, each with a simple white label for quick identification. A standout feature is the inclusion of a turquoise 12VHPWR connector, which highlights the unit's compliance with the latest ATX 3.0 standards with a bit of visual flair.

Interior design

DeepCool PX850G 850W PSU comes with Hong Hua HA13525H12SF-Z 135 mm fan, including FDB engine. These fans are popular and known for their high quality. This particular fan operates at a very high maximum speed of 2300 RPM, which is an impressive figure for a 135mm fan tasked with cooling an 850W unit.

The DeepCool PX850G 850W PSU is manufactured by Channel-well Technologies (CWT), a prominent OEM known for its expertise in producing mid-to-high power output PC power supplies. CWT's legacy as a respected OEM is well established, with their platforms found in some of the most popular products of all time.

The DeepCool PX850G 850W PSU architecture is based on tried and true topologies, with no surprises. At the input of the power supply, the filtering stage is expanded slightly over the minimum baseline recommended by the ATX design guide, consisting of four Y capacitors, two X capacitors, and two filtering inductors. Next come the two rectifier bridges, both connected to their own dedicated heatsinks. Active power factor correction (APFC) circuitry takes up a lot of space, with a central heatsink housing the active components along the perimeter of the PCB. The APFC transistors are two Infineon 6R125P6 MOSFETs and a diode. The APFC also includes an encapsulated filtering inductor and two large capacitors (one Nippon Chemi-Con 330 μF and one Rubycon 470 μF).

In the core inverter stage of the DeepCool PX850G 850W PSU, a half-bridge LLC topology is implemented, with two power transistors mounted on a fairly dedicated heatsink—a configuration popular among modern power supplies for its low cost and reliability. Is. The secondary conversion stage consists of six Onsemi 5C430N transistors on the vertical daughter board, producing a single 12V output. The 3.3V and 5V outputs are handled by DC-to-DC conversion circuits on another daughter board.

On the secondary side, the DeepCool PX850G 850W PSU features several Nichicon polymer capacitors along with capacitors from Rubycon and Nippon Chemi-Con. This mix of highly regarded Japanese manufacturers makes the PX850G a fully Japanese affair, helping both the company's marketing efforts and consumer peace of mind.

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