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Test Configuration And Short Circuit Tests

Sub-$75 Mainstream Power Supply Roundup
By , Patrick Afschar
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 High-Speed 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
Corsair CX400W (115 V)yes
Corsair CX400W  (230 V)yes
FSP Saga II 400  (115 V)yes
FSP Saga II 400 (230 V)yes
Xigmatek NRP PC402  (115 V)yes
Xigmatek NRP PC402 (230 V)yes
Huntkey Jumper 450B (115 V)yes
Huntkey Jumper 450B (230 V)yes
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