EVGA SuperNOVA 650 GA – Review

By Charlie chimp

Published: October 30, 2020

More than once I have heard from an acquaintance or friend with a knowledge of the subject that EVGA is a trusted brand when it comes to power supplies or PSU (Power Supply Unit) concerned. Whether that statement is impartial or not, more than once I have had it hovering in my head and now with the EVGA SuperNOVA 650 GA on the test table, I will try to verify it.

At this point in life, I think it goes without saying that when you assemble your PC you should reserve a certain amount to buy a good source of power. I will sound like a broken cuckoo clock, but I will repeat it: a PC is only as powerful as its weakest link and all the more reason to prioritize the part of the PC that will make all this set of delicate electronic components work.

And, with this source, EVGA proposes to bring a good 80 Plus gold certified PSU to the mid-range range, with a competitive price and good performance.

Unboxing and overview

The EVGA SuperNOVA 650 GA comes in a box with enough space to be cushioned and to store the cables, which, although they are few, it is better not to have them all tangled.

The font is the standard size, ie 86mm x 150mm x 150mm and weighs just over 2.5kg.

On one side we have printed the power specifications of the source and highlights the text that indicates that this source works at maximum load up to 50 ° C. This is somewhat theoretical and although EVGA claims it is something that is difficult to achieve even for high-end sources, but the closer we get to that value, the better the source will be.

On the other hand, we have the main plug next to the power on and off button and the button to activate or deactivate the ECO mode, which what it does is deactivate the fan when there is less than 40% energy load.

On this side we have the connectors that go to the PC. As we can see, it is a totally modular source and in terms of the number of connectors, this is not much but it makes sense in the case of a 650 W source. In total we have:

  • 1 ATX 24-pin port
  • 1 EPS port for 8-pin CPU (4 + 4)
  • 2 VGA or PCIe 8-pin ports (6 + 2)
  • 3 6-pin ports for SATA drives and other peripherals

As you can see, this source is not intended for CPU overclocking either, some boards that we have analyzed here require two cables just for the CPU.

At the bottom we have a 135 mm fan with “double ball bearing” technology. What is not specified is the maximum noise it generates.

The cables included in the box are as follows:

1 ATX 600mm cable

  • 1 EPS 700mm cable
  • 2 x 700mm PCIe cables
  • 2x 550mm SATA cables
  • 1 x 550mm 4-pin peripheral cable

In addition, we have an adapter for RGB fans or devices, two velcro ties for cable management and a small tool for testing the source.

The cables have a braided covering.

Features and Specifications

The EVGA SuperNOVA 650 GA is a certified power supply 80 PLUS GOLD, which means that it ensures an efficiency of 92% to 50% of its total capacity.

  • Among its most outstanding characteristics we have the following:
  • Active Power Factor Correction
  • ECO mode to reduce fan noise at low power loads
  • Heavy duty protections, including protection against short circuit, temperature, current and voltage changes.
  • 135 mm fan with “Double Ball Bearing” mechanism

Among other features we have that This font is compatible with Nvidia SLI and AMD Crossfire technology. However, current Nvidia mid- or low-end cards no longer include this technology and considering that they now consume more power, Take into account the total consumption of your PC before oversaturating your source.

For the full list of specifications and features you can visit this link.

Power specifications

In the power or energy specifications we have to this source operates in a temperature range of 0 to 50 ° C and has a estimated life time of 100,000 hours or about 10 years.

We also see the list of voltages and the maximum output of the amperage and Watts combined. A small clarification here in case it seems strange to you that it is a 650 W source but in the specifications the combined sum is greater than that number. This is that these numbers indicate the maximum power output for a given rail, in total there are 650 W available and each rail has the capacity to deliver a maximum number of power, that is why the 12V one has a greater capacity.

Performance, noise and efficiency tests

Doing an in-depth analysis of a power source is all science. Within this there are a series of small components, each one in charge of a task to achieve the final objective: to deliver clean and stable energy to the PC.

Data needs to be analyzed and collected on various components and various electrical processes that take place at the source. In principle, the voltage, current, wave oscillation, component efficiency, total equipment consumption, temperature and more should be analyzed.

And to make an analysis of this type, because you need a team like this that is obviously not cheap or easy to get, and it also requires a great technical knowledge of the matter – if you want to know more about the whole process, I leave you this link.

It is in our plans to get some tools such as a PSU tester, a power consumption meter or Watts and a noise analyzer, but at the moment we only have a multimeter.

That said, some data, such as efficiency, have been referenced from other articles and others, such as voltage, have been corroborated by us.


The EVGA SuperNOVA 650 GA was tested on a system consisting of a Core i7-7700k overclocked at 4.7 GHz, an RTX 2060 with TDP unlocked, 3 hard drives, 1 SATA SSD, and 4 fans. Now although there will be a higher consumption to be overclocked, in themselves these chips do not require too much power.

In stress testing, rendering and games I did not exceed 600 W of consumption, having an average of 530 W. So if you have a similarly configured PC with this font, you’re covered.

Let’s move on to efficiency. The efficiency of a PSU implies that ratio between how much power comes from the outlet and how much is actually consumed by the PC. There is always a small loss in the process carried out by the electrical source that is useful to know but it could take a while to explain it so I leave you another link so that you can learn more about it.

The most important thing to keep in mind that the higher the efficiency, the less energy wasted -lower your electricity bill- and what this varies according to load and temperature conditions to which the source is subjected.

Efficiency is denoted by 80 PLUS certifications, you know, the ones ranging from Bronze to Titanium. Obviously higher certification is better, but the price difference between one tier to another is several tickets while the efficiency increases by 2%.

In this case, the EVGA SuperNOVA 650 GA has an 80 PLUS GOLD certification which means that, in the best scenario, bone At 50% of its total energy capacity, it should be 92% efficient.

In the results obtained by Techpowerup, at 50% load an efficiency of 91.99% is obtained; and at 100%, 88.78%. With which it is corroborated that the efficiency is close to the certification.


We corroborate this information on our own by using a multimeter and the AIDA64 program.

The idea is that the rail voltages going to the board deviate as little as possible from the tolerance established by the ATX 2.4 specification.

PSU tolerance table
Rail voltage Tolerance Minimum voltage Max voltage
+ 3.3VDC ± 5% +3,135 VDC +3,465 VDC
+ 5VDC ± 5% +4,750 VDC +5,250 VDC
+ 5VSB ± 5% +4,750 VDC +5,250 VDC
-5VDC (if used) ± 10% -4,500 VDC -5,500 VDC
+ 12VDC ± 5% +11,400 VDC +12,600 VDC
-12VDC ± 10% -10,800 VDC -13,200 VDC

The results obtained are acceptable considering the price range and range of this source. Average deviation is below the allowed 5%, approaching 1%, except on the + 5V StandBy and -12V rails.

The results were the following:

Rail Measured deviation
+ 3.3V +3.34 (1.2%)
+ 5V +5.05 (1%)
+ 5V StandBy +5.13 (2.6%)
+ 12V +12.12 (1%)
-12V -12.24 (2%)


When the SuperNOVA 650 GA is At 50% load, it reaches almost 45 ° C and the fan rotates at 1170 RPM and generates 38.8 dBA of noise. At 100% load, we reach the threshold of 50 ° C, the maximum temperature at which EVGA certifies optimal operation, and the fan rotates at its maximum speed of 1700 RPM and generates about 46.1 dBA.

With those noise values, this source is not silent, something that can be noticed with the simple ear when performing these tests. It should be mentioned that this is achieved when the maximum potential of the source is reached, something that is rarely achieved on a day-to-day basis.


Through the data obtained on our own and consulted other articles, we have confirmed that indeed this source meets almost exactly the specifications proposed by EVGA and the efficiency of the 80 PLUS GOLD certification.

The SuperNOVA 650 GA practically manages to keep the voltage tolerance within 1% on all rails, something that is nice to see in this range and gamut of PSUs and is very helpful for all components to function properly.

The starting price of this PSU was $ 120 in the USA, but now it can be found for less than $ 100 which places it in a highly competitive position in terms of price compared to other brands. Although due to the current situation and other factors, it may be more expensive or there is some shortage.

Performance wise, this is more than good and it is a highly recommended font in the mid-range, but you have to have a couple of considerations.

The first thing is which can become somewhat noisy when high stress or energy load is applied. Most likely, the noise from the source fan will be confused with the noise generated by the other fans, but if you are somewhat sensitive to noise you may be bothered by having an extra generating source.

The second is more something to consider in general. It is recommended that the PC that you are going to feed with a source like this is mid-range. Having 650 W available – at least today – is no longer enough to have high-performance components at maximum power or several extra peripherals. Despite the fact that the chips become smaller and require less energy, they are endowed with a higher consumption to get those extra frames that we like so much. Also, if you’ve been keeping up with the latest releases from both AMD and Nvidia, their new products will consume more power than their predecessors. So consider the right source to support all the components you want to have.

For the rest, I think that the SuperNOVA 650 GA corroborates that idea of ​​the collective imagination that one of EVGA’s strengths is, indeed, the power sources. Is in specific it’s good in its range, with a reasonable label price and that exceeds what matters most: performance and efficiency at high temperatures and energy loads.

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