EVGA SuperNOVA 850 G7 Power Supply Review

It’s time for a new leadership power supply: The EVGA SuperNOVA 850 G7 outperforms the mighty Corsair RM850x (2021), earning a place in our list of the best PSUs. It might not have a 12+4 pin PCIe connector yet, but it offers top performance and super-compact dimensions. The 850W G7 and G6 units have the same price tags. You should go with the first if you are interested in pure performance or choose the second if you care more about noise output. 

FSP is providing the platforms. The G2 and G3 lines were by Super Flower, G5 by FSP and G6 used the Seasonic Focus platform. The power density scores go through the roof with only 130 mm in length for all G7 units. So far, we haven’t encountered such small ATX form-factor PSUs, especially in 1,000 W and 850 W capacities. There is no room to go any smaller than that, without sacrificing the 120 mm fan for a smaller one, which would lead to increased noise. If you need smaller PSUs, you should look at the SFX-L and SFX form factors.

The exterior design looks nice with a light blue fan grille, fully modular cable design and compact dimensions. 

On one of the PSU’s sides you will find five LED indicators, which depict the load level. 


Manufacturer (OEM) FSP
Max. DC Output 850W
Efficiency 80 PLUS Gold, Cybenetics Platinum (89-91%)
Noise Cybenetics Standard++ (30-35 dB[A])
Intel C6/C7 Power State Support
Operating Temperature (Continuous Full Load) 0 – 50°C
Over Voltage Protection
Under Voltage Protection
Over Power Protection
Over Current (+12V) Protection
Over Temperature Protection
Short Circuit Protection
Surge Protection
Inrush Current Protection
Fan Failure Protection
No Load Operation
Cooling 120mm Fluid Dynamic Bearing Fan (MGA12012XF-O25)
Semi-Passive Operation ✓(selectable)
Dimensions (W x H x D) 150 x 85 x 130mm
Weight 1.72 kg (3.79 lb)
Form Factor ATX12V v2.52, EPS 2.92
Warranty 10 Years

Power Specifications

Rail 3.3V 5V 12V 5VSB -12V
Max. Power Amps 24 24 70.8 3 0.5
Watts 120 850 15 6
Total Max. Power (W) 850

Cables and Connectors

Description Cable Count Connector Count (Total) Gauge In Cable Capacitors
ATX connector 20+4 pin (600mm) 1 1 18-22AWG Yes
4+4 pin EPS12V (700mm) 2 2 18AWG No
6+2 pin PCIe (700mm+150mm) 2 4 18AWG No
6+2 pin PCIe (700mm) 2 2 18AWG No
SATA (550mm+100mm+100mm) 3 9 18AWG No
4-pin Molex (550mm+100mm+100mm+100mm) 1 4 18AWG No
FDD Adapter (100mm) 1 1 22AWG No
AC Power Cord (1390mm) – C13 coupler 1 1 16AWG

All the cables are long, and the amount of connectors is sufficient. With two EPS and six PCIe connectors, the PSU won’t have any problems delivering its full power. There are also plenty of peripheral connectors, but the distance between them is short. 

EVGA SuperNOVA 850 G7

(Image credit: Tom’s Hardware)

FSP used in-cable caps in the ATX cable for better ripple suppression, so don’t expect this cable to be highly flexible.

Component Analysis

We strongly encourage you to have 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) FSP
PCB Type Double Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush Protection NTC Thermistor SCK-056 (5 Ohm) & Relay
Bridge Rectifier(s)




APFC Boost Diode


Bulk Cap(s)
1x Nippon Chemi-Con (420V, 470uF, 2,000h @ 105°C, KHE) &
1x TK (420V, 330uF, 2,000h @ 105°C, LGW)
Main Switchers
2x Infineon IPP60R120P7 (600V, 16A @ 100°C, Rds(on): 0.12Ohm)

IC Driver

1x Novosense NSi6602

APFC Controller
Resonant Controller Champion CM6901T2X

Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters

Secondary Side
+12V MOSFETs no info
5V & 3.3V DC-DC Converters: 6x Infineon BSC0901NS (30V, 94A @ 100°C, Rds(on): 1.9mOhm)
PWM Controller(s): ANPEC APW7159C
Filtering Capacitors

Electrolytic: 5x Rubycon (3-6,000h @ 105°C, YXG)
Polymer: 17x Nippon Chemi-Con, 6x NIC

Supervisor IC Weltrend WT7527RA (OCP, OVP, UVP, SCP, PG)
Fan Controller Microchip PICF15324
Fan Model Protechnic Electric MGA12012XF-O25 (120mm, 12V, 0.52A, Fluid Dynamic Bearing Fan)
5VSB Circuit
1x NIKO-SEM P1006BD (60V, 42A @ 100°C, Rds(on): 10mOhm) FET
Standby PWM Controller Power Integrations INN2603K

The OEM behind this platform is FSP, and it looks nice! The only problem is that because of the overpopulated, tiny PCB, we had a tough time identifying all parts without heavy de-soldering, which could destroy the PSU, and we need it for future reference in case we have to re-test it. FSP used good parts, and the design is up to date, with a half-bridge topology and an LLC resonant converter on the primary side. The secondary side hosts a synchronous rectification scheme for the 12V rail and DC-DC converters for the minor rails.

The EMI filter is complete so that EMI emissions won’t be an issue, both incoming and outgoing. We also found an MOV for handling voltage surges and an NTC thermistor and bypass relay combo, for protection against high inrush currents. 

EVGA SuperNOVA 850 G7

(Image credit: Tom’s Hardware)

The pair of bridge rectifiers is sandwiched between two heat sinks. 

The APFC converter uses three FETs and a single boost diode. The PFC controller is installed on a vertical board, an Infineon ICE2PCS02. The same board also hosts an operational amplifier (op-amp). The bulk caps are a weird mix of Chemi-Con and TK. Usually, identical bulk caps are used, but in this case, we find two different. A good reason for this can be the shortage of caps. 

Two Infineon IPP60R120P7 are the main FETs, configured in a half-bridge topology. Their driver IC is a Novosense NSi6602, and the LLC resonant converter is a Champion CM6901T2X IC. Precisely the same parts are used in the 1000 G7 unit. 

The FETs that regulate the 12V rail are installed on a board next to the main transformer to minimize energy losses. The DC-DC converters are installed on another vertical board. 

The mix of Rubycon electrolytic and Chemi-Con and NIC polymer caps, is the best we could ask for this PSU. 

The standby PWM controller is by Power Integrations, and a NIKO-SEM P1006BD FET is the rectifier on the secondary side of the 5VSB circuit. The same 5VSB circuit is used on the 1000 G7 model. 

Many Chemi-Con polymer caps are installed on the modular PCB for ripple filtering purposes. 

EVGA SuperNOVA 850 G7

(Image credit: Tom’s Hardware)

The main supervisor IC is a Weltrend WT7527RA.

Soldering quality is decent overall, but we noticed some bad spots, which don’t affect the unit’s performance, though. 

Protechnic electric is a force in fans, so we are pleased to see one of its products in this unit. The fluid dynamic bearing ensures the fan’s longevity and low noise output under average speeds. Keep in mind, though, that this fan is strong, so it won’t be quiet at high speeds. 

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To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units. 

Primary Rails And 5VSB Load Regulation

The following charts show the main rails’ voltage values recorded between a range of 40W up to the PSU’s maximum specified load, along with the deviation (in percent). Tight regulation is an important consideration every time we review a power supply because it facilitates constant voltage levels despite varying loads. Tight load regulation also, among other factors, improves the system’s stability, especially under overclocked conditions. At the same time, it applies less stress to the DC-DC converters that many system components utilize.

Load regulation is satisfactory on all rails. 

Hold-Up Time

Put simply; hold-up time is the amount of time that the system can continue to run without shutting down or rebooting during a power interruption.

The hold-up time is long and the power ok signal is accurate. The “PWR OK Inactive to DC Loss Delay” signal could be shorter, though. 

Inrush Current

Inrush current, or switch-on surge, refers to the maximum, instantaneous input current drawn by an electrical device when it is first turned on. A large enough inrush current can cause circuit breakers and fuses to trip. It can also damage switches, relays and bridge rectifiers. As a result, the lower the inrush current of a PSU right as it is turned on, the better.

Inrush current is high with both voltage inputs, 115V and 230V, that we tried. 

Leakage Current

In layman’s terms, leakage current is the unwanted transfer of energy from one circuit to another. In power supplies, it is the current flowing from the primary side to the ground or the chassis, which in the majority of cases is connected to the ground. For measuring leakage current, we use a GW Instek GPT-9904 electrical safety tester instrument.

The leakage current test is conducted at 110% of the DUT’s rated voltage input (so for a 230-240V device, we should conduct the test with 253-264V input). The maximum acceptable limit of a leakage current is 3.5 mA and it is defined by the IEC-60950-1 regulation, ensuring that the current is low and will not harm any person coming in contact with the power supply’s chassis.

EVGA SuperNOVA 850 G7

(Image credit: Tom’s Hardware)

Leakage current is low. 

10-110% Load Tests

These tests reveal the PSU’s load regulation and efficiency levels under high ambient temperatures. They also show how the fan speed profile behaves under increased operating temperatures.

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
10% 5.158A 1.943A 1.943A 0.987A 85.022 87.313% 0 <6.0 44.85°C 0.97
12.295V 5.147V 3.397V 5.069V 97.377 40.44°C 115.13V
20% 11.321A 2.917A 2.918A 1.186A 170.001 90.757% 0 <6.0 45.93°C 0.992
12.286V 5.143V 3.394V 5.059V 187.311 41.08°C 115.11V
30% 17.834A 3.404A 3.407A 1.388A 255.027 91.83% 0 <6.0 46.85°C 0.992
12.278V 5.142V 3.391V 5.046V 277.72 41.68°C 115.08V
40% 24.361A 3.892A 3.896A 1.589A 340.136 92.113% 0 <6.0 47.71°C 0.994
12.271V 5.14V 3.389V 5.035V 369.258 41.94°C 115.06V
50% 30.554A 4.867A 4.874A 1.792A 425.218 91.929% 0 <6.0 48.39°C 0.995
12.264V 5.137V 3.386V 5.023V 462.547 42.33°C 115.04V
60% 36.705A 5.844A 5.853A 1.994A 509.705 91.551% 0 <6.0 49.23°C 0.995
12.257V 5.135V 3.383V 5.016V 556.746 42.57°C 115.02V
70% 42.988A 6.823A 6.844A 2.201A 595.029 90.901% 1288 31.7 43.21°C 0.995
12.233V 5.132V 3.376V 5V 654.592 50.36°C 114.99V
80% 49.238A 7.803A 7.831A 2.306A 679.873 90.366% 1564 36.7 43.76°C 0.994
12.225V 5.128V 3.371V 4.989V 752.364 52.04°C 114.96V
90% 55.891A 8.295A 8.314A 2.411A 765.312 89.716% 1976 43.3 44.81°C 0.994
12.216V 5.126V 3.368V 4.98V 853.044 54.01°C 114.94V
100% 62.293A 8.787A 8.828A 3.028A 850.115 88.986% 2332 47.7 46.06°C 0.993
12.206V 5.124V 3.365V 4.955V 955.33 56.16°C 114.91V
110% 68.574A 9.769A 9.91A 3.033A 934.686 88.128% 2693 51.2 47.3°C 0.993
12.197V 5.12V 3.36V 4.948V 1060.586 58.19°C 114.88V
CL1 0.114A 14.089A 14.093A 0A 121.339 85.678% 1248 30.2 42.57°C 0.984
12.287V 5.127V 3.385V 5.085V 141.629 48.03°C 115.12V
CL2 0.114A 23.473A 0A 0A 121.446 84.379% 1231 30.2 43.97°C 0.985
12.289V 5.114V 3.399V 5.091V 143.926 50.17°C 115.12V
CL3 0.114A 0A 23.426A 0A 80.597 78.766% 870 19.5 44.65°C 0.972
12.280V 5.149V 3.381V 5.083V 102.323 52.73°C 115.13V
CL4 69.588A 0A 0A 0A 849.771 89.583% 2088 45.9 45.35°C 0.993
12.212V 5.14V 3.378V 5.045V 948.581 55.31°C 114.91V

The PSU can handle harsh operating conditions, that is, increased loads and temperatures, but don’t expect it to be quiet. 

20-80W Load Tests

In the following tests, we measure the PSU’s efficiency at loads significantly lower than 10% of its maximum capacity (the lowest load the 80 PLUS standard measures). This is important for representing when a PC is idle with power-saving features turned on.

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
20W 1.209A 0.486A 0.485A 0.196A 20.021 70.679% 0 <6.0 40.04°C 0.806
12.299V 5.149V 3.399V 5.094V 28.329 36.93°C 115.15V
40W 2.660A 0.68A 0.68A 0.295A 40.019 81.124% 0 <6.0 40.92°C 0.913
12.298V 5.149V 3.399V 5.089V 49.331 37.59°C 115.14V
60W 4.110A 0.874A 0.874A 0.393A 60.018 85.315% 0 <6.0 42.84°C 0.95
12.297V 5.149V 3.399V 5.085V 70.347 39.13°C 115.14V
80W 5.560A 1.068A 1.068A 0.492A 79.989 87.556% 0 <6.0 43.35°C 0.968
12.296V 5.148V 3.398V 5.081V 91.357 39.39°C 115.13V

The unit achieves high efficiency under light loads, with minimal noise output because the fan doesn’t spin. 

2% or 10W Load Test

From July 2020, the ATX spec requires 70% and higher efficiency with 115V input. The applied load is only 10W for PSUs with 500W and lower capacities, while for stronger units, we dial 2% of their max-rated capacity.

12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
1.226A 0.25A 0.25A 0.052A 17.474 68.51% 0 <6.0 37.99°C 0.778
12.299V 5.15V 3.4V 5.099V 25.508 35.45°C 115.15V

The PSU exceeds 60% efficiency with a 2% load. It would be nice to measure above 70%, though, in this test scenario. 

Efficiency & Power Factor

Next, we plotted a chart showing the PSU’s efficiency at low loads and loads from 10 to 110% of its maximum rated capacity. The higher a PSU’s efficiency, the less energy goes wasted, leading to a reduced carbon footprint and lower electricity bills. The same goes for Power Factor.

The platform is highly efficient with normal loads, also achieving good results with light loads. The competition is tough at light and super-light loads, so FSP could improve the platform in these sectors. 

5VSB Efficiency

Test # 5VSB DC/AC (Watts) Efficiency PF/AC Volts
1 0.1A 0.51W 77.34% 0.065
5.093V 0.659W 115.15V
2 0.25A 1.273W 80.723% 0.146
5.091V 1.577W 115.15V
3 0.55A 2.796W 82.185% 0.262
5.082V 3.402W 115.15V
4 1A 5.074W 80.724% 0.362
5.073V 6.285W 115.14V
5 1.5A 7.596W 79.19% 0.414
5.063V 9.591W 115.15V
6 3.001A 15.056W 78.672% 0.478
5.018V 19.137W 115.14V

The 5VSB rail is efficient. 

Power Consumption In Idle And Standby

Mode 12V 5V 3.3V 5VSB Watts PF/AC Volts
Idle 12.302V 5.151V 3.402V 5.103V 7.16 0.411
Standby 0.059 0.006

We would like to see below 0.1W vampire power with 230V input. 

Fan RPM, Delta Temperature, And Output Noise

All results are obtained between an ambient temperature of 37 to 47 degrees Celsius (98.6 to 116.6 degrees Fahrenheit).

(Image credit: Tom’s Hardware)

(Image credit: Tom’s Hardware)

The fan’s speed is not aggressive considering the test conditions, the tiny and overpopulated PCB, and the high power output. 

The following results were obtained at 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit) ambient temperature.       

(Image credit: Tom’s Hardware)

(Image credit: Tom’s Hardware)

Some spots in the PSU’s noise map at normal operating temperatures indicate that the fan speed increased notably to cope with heat build-up. This is why it is preferable to have the fan spinning at all times rather than employing a semi-passive operation mode. With more than 690W, the PSU exceeds 30 dBA; with 20-30W more, it goes over 35 dBA. With a larger PCB, allowing for more airflow between parts, and a 135-140mm fan, things could be better in noise output. 

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Protection Features

Check out our PSUs 101 article to learn more about PSU protection features.

OCP (Cold @ 31°C) 12V: 101.2A (142.97%), 12.160V
5V: 30.7A (127.92%), 5.101V
3.3V: 29.1A (121.25%), 3.367V
5VSB: 4.3A (143.33%), 4.978V
OCP (Hot @ 46°C) 12V: 98.2A (138.71%), 12.179V
5V: 28.3A (117.92%), 5.106V
3.3V: 29A (120.83%), 3.369V
5VSB: 4.3A (143.33%), 4.983V
OPP (Cold @ 33°C) 1230.95W (144.82%)
OPP (Hot @ 43°C) 1196.11W (140.72%)
OTP ✓ (142°C @ 12V Secondary Side)
SCP 12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓
PWR_OK Proper Operation
SIP Surge: MOV
Inrush: NTC Thermistor & Bypass Relay

OCP at 12V and OPP are highly set, most likely to cope with power spikes. That is not the best way to do it since it makes the PSU’s protection features less effective. On the minor rails, the OCP triggering points are correctly set. 

DC Power Sequencing

According to Intel’s most recent Power Supply Design Guide (revision 1.4), the +12V and 5V outputs must be equal to or greater than the 3.3V rail at all times. Unfortunately, Intel doesn’t mention why it is so important to always keep the 3.3V rail’s voltage lower than the levels of the other two outputs.

No problems here since the 3.3V rail is always lower than the other two. 

Cross Load Tests

To generate the following charts, we set our loaders to auto mode through custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V, and 3.3V rails. The deviations in each of the charts below are calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature during testing was between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

Load Regulation Charts

Efficiency Graph

(Image credit: Tom’s Hardware)

Ripple Graphs

The lower the power supply’s ripple, the more stable the system will be and less stress will also be applied to its components.

Infrared Images

We apply a half-load for 10 minutes with the PSU’s top cover and cooling fan removed before taking photos with a modified Fluke Ti480 PRO camera able to deliver an IR resolution of 640×480 (307,200 pixels).

The board holding the 12V FETs is the spot reporting the highest temperatures. Still, we didn’t notice alarmingly high temperatures, thanks to the highly efficient platform that minimizes energy losses. 

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Advanced Transient Response Tests

For details about our transient response testing, please click here.

In the real world, power supplies are always working with loads that change. It’s of immense importance, then, for the PSU to keep its rails within the ATX specification’s defined ranges. The smaller the deviations, the more stable your PC will be with less stress applied to its components. 

We should note that the ATX spec requires capacitive loading during the transient rests, but in our methodology, we also choose to apply a worst case scenario with no additional capacitance on the rails. 

Advanced Transient Response at 20% – 20ms

Voltage Before After Change Pass/Fail
12V 12.280V 12.178V 0.83% Pass
5V 5.143V 5.036V 2.08% Pass
3.3V 3.392V 3.278V 3.38% Pass
5VSB 5.056V 5.034V 0.43% Pass

Advanced Transient Response at 20% – 10ms

Voltage Before After Change Pass/Fail
12V 12.282V 12.211V 0.57% Pass
5V 5.144V 5.045V 1.93% Pass
3.3V 3.393V 3.276V 3.45% Pass
5VSB 5.057V 5.040V 0.34% Pass

Advanced Transient Response at 20% – 1ms

Voltage Before After Change Pass/Fail
12V 12.282V 12.189V 0.75% Pass
5V 5.144V 5.036V 2.10% Pass
3.3V 3.393V 3.293V 2.95% Pass
5VSB 5.057V 5.034V 0.45% Pass

Advanced Transient Response at 50% – 20ms

Voltage Before After Change Pass/Fail
12V 12.254V 12.182V 0.58% Pass
5V 5.136V 5.037V 1.93% Pass
3.3V 3.382V 3.265V 3.45% Pass
5VSB 5.025V 5.006V 0.38% Pass

Advanced Transient Response at 50% – 10ms

Voltage Before After Change Pass/Fail
12V 12.254V 12.174V 0.65% Pass
5V 5.137V 5.030V 2.09% Pass
3.3V 3.382V 3.268V 3.38% Pass
5VSB 5.024V 5.006V 0.36% Pass

Advanced Transient Response at 50% – 1ms

Voltage Before After Change Pass/Fail
12V 12.255V 12.187V 0.55% Pass
5V 5.137V 5.036V 1.96% Pass
3.3V 3.383V 3.275V 3.20% Pass
5VSB 5.025V 5.006V 0.38% Pass

Transient response is good at 12V, 3.3V and 5VSB and satisfactory at 5V. 

Turn-On Transient Tests

In the next set of tests, we measure the PSU’s response in simpler transient load scenarios—during its power-on phase. Ideally, we don’t want to see any voltage overshoots or spikes since those put a lot of stress on the DC-DC converters of installed components.

We didn’t notice any notable voltage overshoots or voltage spikes, in these tests. 

Power Supply Timing Tests

There are several signals generated by the power supply, which need to be within specified, by the ATX spec, ranges. If they are not, there can be compatibility issues with other system parts, especially mainboards. From year 2020, the PSU’s Power-on time (T1) has to be lower than 150ms and the PWR_OK delay (T3) from 100 to 150ms, to be compatible with the Alternative Sleep Mode.

PSU Timings Table
T1 (Power-on time) & T3 (PWR_OK delay)
Load T1 T3
20% 47ms 127ms
100% 42ms 131ms

The PWR_OK delay is within the 100-150ms region, so the PSU supports the alternative sleep mode recommended by the ATX spec.

Ripple Measurements

Ripple represents the AC fluctuations (periodic) and noise (random) found in the PSU’s DC rails. This phenomenon significantly decreases the capacitors’ lifespan because it causes them to run hotter. A 10-degree Celsius increase can cut into a cap’s useful life by 50%. Ripple also plays an important role in overall system stability, especially when overclocking is involved.

The ripple limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 6.3 mV 4.9 mV 6.7 mV 8.5 mV Pass
20% Load 7.5 mV 5.3 mV 6.7 mV 10.0 mV Pass
30% Load 7.6 mV 5.8 mV 7.4 mV 9.9 mV Pass
40% Load 8.0 mV 6.7 mV 7.4 mV 9.3 mV Pass
50% Load 8.7 mV 6.7 mV 7.8 mV 10.3 mV Pass
60% Load 9.3 mV 7.2 mV 8.8 mV 12.1 mV Pass
70% Load 9.9 mV 7.3 mV 9.6 mV 13.3 mV Pass
80% Load 10.8 mV 8.1 mV 9.7 mV 13.5 mV Pass
90% Load 11.9 mV 9.9 mV 11.2 mV 13.9 mV Pass
100% Load 18.6 mV 10.4 mV 11.9 mV 16.3 mV Pass
110% Load 20.4 mV 14.0 mV 12.7 mV 15.6 mV Pass
Crossload 1 10.2 mV 7.5 mV 8.6 mV 6.8 mV Pass
Crossload 2 6.8 mV 6.3 mV 7.7 mV 5.5 mV Pass
Crossload 3 6.9 mV 6.4 mV 8.2 mV 4.1 mV Pass
Crossload 4 18.4 mV 9.8 mV 10.5 mV 6.6 mV Pass

Ripple suppression is good on all rails. 

Ripple At Full Load

Ripple At 110% Load

Ripple At Cross-Load 1

Ripple At Cross-Load 4

EMC Pre-Compliance Testing – Average and Quasi-Peak EMI Detector Results

Electromagnetic Compatibility (EMC) is the ability of a device to operate properly in its environment without disrupting the proper operation of other nearby devices.

Electromagnetic Interference (EMI) is the electromagnetic energy a device emits, and it can cause problems in other nearby devices if too high. For example, it can cause increased static noise in your headphones or/and speakers.

΅We use TekBox’s EMCview to conduct our EMC pre-compliance testing.

(Image credit: Tom’s Hardware)

EMI emissions are low, with both the average and peak EMI detectors. 

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Performance Rating

(Image credit: Tom’s Hardware)

Overall performance tops the chart. 

Noise Rating

The graph below depicts the cooling fan’s average noise over the PSU’s operating range, with an ambient temperature between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

(Image credit: Tom’s Hardware)

The EVGA 850 G7 is not noisy under average loads and operating temperatures, but it will get loud if you push it hard. This affects its overall noise output. 

Efficiency Rating

The following graph shows the PSU’s average efficiency throughout its operating range with an ambient temperature close to 30 degrees Celsius.

(Image credit: Tom’s Hardware)

The 850 G7 is highly efficient.

Power Factor Rating

The following graphs show the PSU’s average power factor reading throughout its operating range with an ambient temperature close to 30 degrees Celsius and 115V/230V voltage input. 

The APFC converter has good performance with 115V, while there is room for improvement with 230V input. 

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The EVGA 850 G7 is one of the best 850W units the market today. The Corsair RM850x (2021) is close in performance and has an advantage in noise output, while the 850 G6 loses notably in performance but achieves a significant win in noise output. The performance FSP delivered out of such a compact platform is impressive. We can’t stop thinking, though, about the improvement in noise output with a larger PCB and cooling fan. Downsizing high-capacity PSUs at that degree comes at a cost, of increased noise output, under harsh conditions.

(Image credit: Tom’s Hardware)

Besides the tiny footprint, the top performance, the fully modular cable design and the high build quality, EVGA threw in LED load indicators on one of the PSU’s sides. Someone can argue that it would be better if an external PCB hosted these LED indicators, which the user could install on top of their desk to be easily accessible. This sounds good, but it would also likely increase the cost. We also noticed is that FSP used two different bulk caps in this unit, with the second provided by a less known manufacturer. We would like to see both caps have the same quality. 

The EVGA 850 G7 brings up memories of the legendary G2 units, which were among the best PSUs that EVGA ever offered. We are eager to see the upgraded G7 versions featuring the new 12+4 pin PCIe connectors and ATX 3.0 support.

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Disclaimer: Aris Mpitziopoulos is Tom’s Hardware’s PSU reviewer. He is also the Chief Testing Engineer of Cybenetics and developed the Cybenetics certification methodologies apart from his role on Tom’s Hardware. Neither Tom’s Hardware nor its parent company, Future PLC, are financially involved with Cybenetics. Aris does not perform the actual certifications for Cybenetics.

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