Sub-$75 Mainstream Power Supply Roundup

Test Configuration And Short Circuit Tests

Test Hardware
AC SourceChroma Programmable AC Source 6530
Power MeterYokogawa WT210 Digital Power Meter
Loads4 x 600 W Chroma 63306 for 12 V testing
4 x 300 W Chroma 63303 for 5 and 3.3 V testing using Chroma HighSpeed- DC Load Mainframes 6334
OscilloscopeTektronix DPO3034 Digital Phosphore Oscilloscope (300 MHz)
Test Procedure
Voltages110 and 230 V
Standby Power0.25 A fixed current to simulate PC standby power on 5 Vsb
80 PLUS Efficiency Testing100/50/20% load, relative to specified total output
Load distribution across 12/5/3.3 V rails at the same proportion as specified for 100% testing at 110 V according to ATX 2.3 specification
Efficiency at Fixed Loads25, 50, 85, 300, 500 W loads
Load distribution across 12/5/3.3 V rails at the same proportion as specified for 100%
Peak Load Test110% Overload Testing at maximum combined 12 V
Temperature TestAir intake vs. outtake temperature delta
tracking highest delta during all tests
Short Circuit Protection Test (12 V)
ModelTest Passed
Antec EA-380D Green (115 V)yes
Antec EA-380D Green (230 V)yes
Chieftec BPS-450S (115 V)yes
Chieftec BPS-450S (230 V)yes
Enermax PRO 82+ II (115 V)yes
Enermax PRO 82+ II (230 V)yes


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  • mi1ez
    1) Stop moaning about PSU.s that aren't available in the US.
    2) Where are the actual voltages for each rail? It feels like most of this test is missing!
  • swamprat
    I can't say I've read every page - but are there noise readings anywhere as well as the occasional comment like "it's quiet"?
  • Anonymous
    Small PSU means desktop/media.... and since the conclusion was "they're all pretty similar" then noise is going to be one of the main selection criteria. So... no real help in choosing :(
  • stone-69
    Uhm... just a newbie question :
    Are cheap PSUs really that bad ?
    I mean I've seen a lot of people basically saying that a cheap PSU will make your PC explode (or something along that note), but I've seen very few thorough reviews of cheap PSUs testing ripple, noise and voltage drops.
    Could this be an idea for a future article ?