EVGA SuperNOVA 650 G3 PSU Review: Excellence Evolved

Early Verdict

The SuperNOVA 650 G3 achieves an excellent value score thanks to its good price and great performance in almost every discipline. However, we are troubled by EVGA's decision to equip it with fewer cables and connectors than its predecessor. Fortunately, most mid-range graphics cards only require one PCIe connector.


  • +

    Reasonable price

  • +

    Full power at 47°C

  • +

    Efficient platform

  • +

    Fairly quiet under light/moderate loads

  • +

    Selectable semi-passive operation

  • +

    Solid build quality


  • -

    Single EPS connector

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    3x PCIe connectors

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    Bulky cables

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    OPP is set sky-high

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Features & Specifications

Back in the day, EVGA's G2 family made the company's PSUs popular. Thanks to an exceptional Super Flower platform and attractive prices, the G2 models softened the figurative battlefield, paving the way for more expensive P2- and T2-series power supplies.

Of course, the old G2 line-up is still fine performance-wise. But its dimensions and noise output are inferior to Corsair's recently introduced second-gen RMx PSUs. Nowadays, most manufactures focus on quiet operation, something that can be accomplished with an efficient platform sporting FDB fans, a loose fan profile, and semi-passive operation under moderate loads.

The G3 series consists of five members with capacities ranging from 550W to 1kW. There currently is no substitute for the 1300 G2 and 1600 G2 units, though it'd be nice if EVGA and Super Flower updated those as well.

In this review, we're looking at the 650W SuperNOVA G3. Rather than sporting two or four PCIe connectors, this PSU strangely includes three. Previously, we took the be quiet! Dark Power Pro 1200 for a spin, and it also had an odd number of connectors. But that power supply was designed to support super-high-end motherboards needing extra juice for add-in cards, which could be provided by a single PCIe connector. What strikes us odd in this case is that the SuperNOVA 650 G2 had four PCIe connectors and a couple of EPS ones. In that regard, the older model is better than its successor.

The SuperNOVA 650 G3 features fully modular cabling, just like the generation before. However, it also incorporates a fluid dynamic bearing fan. EVGA's G2 came with a double ball-bearing fan that was more resilient in hot environments but also noisier. A 50°C temperature rating is inline with the ATX specification's recommendations, and the G3's protection features include everything except OCP for the +12V rail (meaningless in a PSU with one +12V rail).

Compared to last generation's G2 model, the G3's most notable differentiators are its dimensions and the aforementioned fan. The new model's 130mm diameter definitely helps keep noise to a minimum. Both PSUs do offer the same seven-year warranty; only EVGA's higher-capacity G3 models are supported by 10-year coverage.


Super Flower is still the OEM responsible for this power supply family. EVGA has no reason to switch, since Super Flower is one of the best in this business.

Besides 80 PLUS Gold efficiency, the SuperNOVA 650 G3 also achieves an ETA-A rating in the Cybenetics scale, along with a LAMBDA-A- noise certification. This isn't the quietest PSU out there, but it's certainly not noisy.

Power Specifications

Swipe to scroll horizontally
Max. PowerAmps242254.130.5
Total Max. Power (W)650

A single +12V rail delivers up to the PSU's full capacity on its own, and the maximum combined output of the minor rails is sufficient for any modern PC. EVGA's 5VSB rail offers 3A of maximum current output, which is a little higher than what we're used to seeing.

Cables & Connectors

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Modular Cables
DescriptionCable CountConnector Count (Total)GaugeIn Cable Capacitors
ATX connector 20+4 pin (600mm)1118-22AWGYes
4+4 pin EPS12V (700mm)1118-22AWGYes
6+2 pin PCIe (700mm) 1118-22AWGYes
6+2 pin PCIe (600mm+150mm) 1218-22AWGYes
SATA (500mm+100mm+100mm)2618-20AWGNo
Four-pin Molex (500mm+100mm+100mm+100mm)1418AWGNo
FDD Adapter (+100mm)1120AWGNo
AC Power Cord (1370mm) - C13 coupler1118AWG-

The SuperNOVA 650 G3 only sports one EPS connector and three PCIe ones, something that affects this PSU's usability. We don't know the reasons behind EVGA's strange configuration, and we already noted that the previous-gen models had two EPS and four PCIe connectors. So, it seems like the 650 G3 is a big step back in terms of cabling.

SATA connectivity is scaled back as well: you get six connectors compared to the 650 G2's nine. The same goes for four-pin Molex connectors (four instead of six). If you're not particular about noise, it might even be worth hunting down the older model for its extra cables.

The 650 G3's cables are shown in the photos below.

Power Distribution

Since this PSU features a single +12V rail, we do not have anything to say about its power distribution.

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MORE: All Power Supply Content

Contributing Editor

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

  • bit_user
    I'm sure it's been said before, but it's worth repeating: SuperNova is a terrible name for a PSU!

    A supernova ... is a transient astronomical event that occurs during the last stellar evolutionary stages of a massive star's life, whose destruction is marked by one final titanic explosion.

  • Aris_Mp
    Indeed it is but thankfully those ones have nothing to do with explosions :)
  • Co BIY
    "If you want to install a pair of high-end cards, the SuperNOVA 650 G3 is simply not an option."

    Wouldn't 650 watts be too little for a system with two high end cards anyway?

    Nvidia recommends 600W for a system with a 1080 Ti in it.
  • Aris_Mp
    You will only have problems if you try to feed 2x VEGA cards with a 650W PSU. The Nvidia high-end cards have low consumption.

    this article contains power consumption for all high-end Nvidia GPUs. Another one including AMD ones will be released soon.

  • gosubuilder
    I've had this PSU in my build sine around June 2017. Its been solid, haven't had any issues. Its noise isn't as bad as described in this article. I don't think I've stopped once thinking, "damn this PSU is loud" once.
  • jpe1701
    They stopped putting 2 eps connectors in the 650 g2 as well. Mine came with only one and it was bought just a few months ago. Coincidentally would it be safe to use a splitter on that eps cable or was the original wired with connectors on different wires inside the sleeving?
  • 10tacle
    20898091 said:
    I'm sure it's been said before, but it's worth repeating: SuperNova is a terrible name for a PSU!

    LOL I haven't thought of it that way, but Chevrolet sold a lot of Nova cars (started out as the Chevy II in 1962) between 1968 and 1987. They sold 1.7 million between 1968-1974 in 3rd generation alone so the name didn't bother the customer too much.

    Anyway I'm assuming the same G3 series that plagued Aris' review of the G3 450 is now okay with the 650.

    EDIT: I saw in that original review an update stated that EVGA advised all units since that review are made by SF and not outsourced to RSY. Aris does that mean the first batch of those G3 450s were RSY built?

  • bit_user
    20899713 said:
    20898091 said:
    I'm sure it's been said before, but it's worth repeating: SuperNova is a terrible name for a PSU!

    LOL I haven't thought of it that way, but Chevrolet sold a lot of Nova cars (started out as the Chevy II in 1962) between 1968 and 1987. They sold 1.7 million between 1968-1974 in 3rd generation alone so the name didn't bother the customer too much.
    Maybe b/c regular novas don't produce black holes? Also, not sure how violent they are, as a supernova is thought to be different from novas in more than just scale.
  • powernod
    nice PSU but it's unacceptable for a 650watt PowerSupply to have only 1 EPS connector.(EDIT: BeQuiet's 550watt DarkPowerPro11 has 2-EPS!! https://www.bequiet.com/en/powersupply/611 ) Even older AM3+ motherboards such as the ASUS CrosshairV Formula-Z that my brother has, use an 1x8 & 1x4 ATX12V power connector , so this PSU would be unable to power this kind of mobo!!
    Once again, excellent review by @Aris !! The best & most thorough PSU reviewer currently !!