Facebook
Twitter
YouTube
RSS FeedsMushkin Enhanced Joule 800W Power Supply Review
paulktreg - March 9, 2011» Discuss this article (2)
Testing:
Efficiency and Power Factor:
The efficiency of the Mushkin Joule 800W power supply with a 110VAC supply is particularly good when taken in context with other power supplies I’ve tested following the OCC power supply testing methodology. The 80 Plus Silver certification requires efficiencies of 85%, 88% and 85% at 20%, 50% and 100% DC loading and although not quite there it does manage a respectable 84%, 88% and 83% efficiency at 22%, 56% and 101% DC loading. Power factor levels aren’t a problem and are easily maintained above the 0.9 level required by 80 Plus Silver.
Efficiency levels with a 230VAC supply are a little higher and power factor levels a little lower which is usually the case. The 80 Plus Silver certification is only applicable at 115VAC so it doesn’t apply here but a maximum efficiency of 89% at 55% DC loading is still very good.
AC Ripple On DC Outputs:
I have consistently found the AC ripple levels on the DC rails to be more or less equal with an 110VAC or 230VAC mains supply. The results given below are for 230VAC only but I will continue to check the levels at 110VAC during testing and publish them below if there are any significant differences.
AC ripple/noise on the +3V3 rail at 230VAC
Oscilloscope settings: Amplitude = 2mv/div, Timebase = 20uS/div
AC ripple/noise on the +5V0 rail at 230VAC
Oscilloscope settings: Amplitude = 2mv/div, Timebase = 20uS/div
AC ripple/noise on the +12V rail at 230VAC
Oscilloscope settings: Amplitude = 2mv/div, Timebase = 20uS/div
AC ripple/noise on the -12V rail at 230VAC
Oscilloscope settings: Amplitude = 2mv/div, Timebase = 20uS/div
AC ripple/noise on the +5VSB rail at 230VAC
Oscilloscope settings: Amplitude = 2mv/div, Timebase = 20uS/div
|
Mushkin Enhanced Joule 800W (MKNPSJL800) AC Ripple/Noise
|
|||||
|
Supply = 230VAC/50Hz DC Loading = 795W
|
|||||
|
DC Rail
|
+3V3
|
+5V0
|
+12V
|
-12V0
|
+5VSB
|
|
ATX12 Max (mV p-p)
|
50
|
50
|
120
|
120
|
50
|
|
Ripple (mV p-p)
|
10
|
12
|
18
|
11
|
8
|
|
Pass/Fail
|
Pass
|
Pass
|
Pass
|
Pass
|
Pass
|
The Mushkin Joule 800W produced some excellent results in this section with peak to peak levels of AC noise/ripple well within the limits set down by the ATX12V V2.2 specification. The measured level of 18mV on the +12V rail is really excellent when you consider it’s loaded to nearly 60A.
