EVGA 450 B3 PSU Review

Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the 450 B3's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).

Test12V5V3.3V5VSBPass/Fail
10% Load7.3mV5.0mV6.7mV4.7mVPass
20% Load7.9mV5.2mV8.1mV5.2mVPass
30% Load7.9mV5.9mV7.9mV5.5mVPass
40% Load8.4mV6.3mV8.3mV5.8mVPass
50% Load14.0mV6.3mV9.2mV5.9mVPass
60% Load10.5mV7.3mV10.4mV6.6mVPass
70% Load16.0mV7.8mV14.8mV10.7mVPass
80% Load10.9mV7.6mV12.9mV7.7mVPass
90% Load11.9mV7.4mV13.6mV7.7mVPass
100% Load11.8mV9.5mV13.5mV10.4mVPass
110% Load11.8mV9.3mV13.7mV11.0mVPass
Cross-Load 19.3mV7.4mV7.9mV8.6mVPass
Cross-Load 211.1mV8.6mV12.4mV9.3mVPass

Thanks to the secondary side's solid design and extra filtering caps on the cables, ripple suppression is extraordinary. We couldn't ask for more; these reasons put even high-end PSUs to shame.

Ripple Oscilloscope Screenshots

The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.

Ripple At Full Load

Ripple At 110-Percent Load

Ripple At Cross-Load 1

Ripple At Cross-Load 2

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  • raotor
    Blowing up on the bench & the fuse not blowing seems to me to be rather more than an issue. I'd like Tom's to go buy another retail 450 Watt unit & see if it does the same. In addition, I see no mention of the other units in the range being tested which is odd as all models within the B3 line were purchased. Do we know if, say, the 550 Watt version suffers from the same safety issue.

    Further, EVGA's lack of response to this fault is not good for their PR. I'd even go so far as to suggest that such a dangerous failing should be grounds for banning this model from sale until EVGA can recall & fix the units.
  • termathor
    Hi there,

    Curious if EVGA came back to you, guys @ Toms Hardware on this on this fuse not working ...
    Seems to me the issue was serious enough to warrant an investigation !

    Did they really not come back with an explanation ????