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EVGA SuperNOVA 850W G3 Power Supply Review

Author: Lee Garbutt
Manufacturer: EVGA

A Detailed Look

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The EVGA Supernova 850W G3 power supply enclosure is painted matte black and measures 150mm (5.9”) long. The same compact chassis is used for all G3 Series power supplies, up to and including the 1000W model. The back panel includes an AC receptacle, main power On-Off switch, and an ECO Thermal Control fan mode switch (On enables fan-less operation).

The 850 G3 power supply incorporates EVGA’s ECO Intelligent Thermal Control System for fan speed control. This allows the end user to select silent, fan-less operation for low to mid power applications if desired.

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With the ECO Intelligent Thermal Control System turned ON, the power supply cooling fan does not start spinning until the internal component temperatures reach a pre-programmed setting. The fan then starts out at low speed and gradually ramps up based on load and temperature (see graph above).

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The power supply uses a 128mm, seven blade fan on the bottom for cooling.  The EVGA labelled fan (H1282412H) is rated for 0.35A at 12 VDC and is controlled by the ECO Thermal Control System. It features a hydraulic dynamic bearing for long life and quiet operation. This is EVGA’s name for a FDB (Fluid Dynamic Bearing) which is an enhanced sleeve bearing with tiny V-shaped grooves to control and pressurize the flow of lubricating oil.

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The front panel on the 850W G3 incorporates twelve modular cable connectors nicely keyed and labelled to prevent inadvertently plugging a cable into the wrong connector.

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All of the modular cables are sleeved with a black nylon mesh covering. If you are curious as to what the little “bumps” at the device end of the cables are, we dissected one of the 4+4 pin CPU cables to show you.

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Sure enough, those are little filtering capacitors hidden under the shrink wrap and sleeving to suppress any residual AC ripple (CapXon 220 uF, 16V, 105°C). All of the cables have them except for the four peripheral device cables.

Under the Hood

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Here are a few pictures showing the layout and components inside the EVGA Supernova 850W G3 power supply.  The Supernova G3 Series is built by Super-Flower and is based on a second generation Leadex platform.

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The G3 series features a modern LLC resonant circuit design with DC-to-DC converters for increased efficiency (the VRMs are located in the top-left corner of the photo above).  All of the line filtering components reside on the PCB (bottom-right corner). The layout of components is clean while the soldering appears to be very good. All of the capacitors used inside the G3 PSU are high-quality Japanese made (primarily Nippon Chemi-con) electrolytic and solid polymer caps. The 850W G3 uses a single primary capacitor rated for 680uF, 400V and 105°C.

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January 25, 2017 | 06:49 PM - Posted by Anonymous (not verified)

Who cares about the 850W? The 1000W version has been reviewed more than 2 months ago by jonnyguru

PCPER always showing us the latest and greatest! Where is the "I sold my soul to nvidia or EVGA to get a free trip to Vegas" sticker on this "article"?

January 25, 2017 | 07:34 PM - Posted by Kraaketaer

Who cares about 1000W? No relevant combination of modern hardware requires even remotely that much power - an OC'd 6950X with Titan X Pascals in SLI might edge over 700W under power virus loads, but nowhere near 1000. And under normal gaming loads power draw would be far less.

Now stop being an a**. This is a well written and researched, thorough review. And of course JonnyGuru gets an early sample - OklahomaWolf is pretty much regarded as the bee's knees in PSU testing. He probably gets more or less what he wants*. Publishing a high quality review now that units are actually available seems like a good idea to me.

*at least as much as any HW reviewer does.

January 25, 2017 | 09:42 PM - Posted by Anonymous (not verified)

Does this site ever stop hocking keyboards and powersupplies?

January 26, 2017 | 08:28 AM - Posted by Kraaketaer

Positive review of a good product != hocking.

Quality PSUs don't get the attention they deserve/should have. The importance of including a good PSU in your PC build is something that needs to be communicated more, not less, and reviews like this are a part of that. Of course, there's also the tendency for makers of low-cost crap products to not send them out for review, which unfortunately few publications have the funds to do anything about themselves.

January 27, 2017 | 06:36 AM - Posted by scajjr2

Last 2 EVGA power supplies I tried in the past few months were both DOA. Have gone back to Corsair.

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