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paulktreg - December 1, 2010» Discuss this article (1)
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Testing:
For more information on how we test our power supplies, please browse our testing methodology.
Short Circuit Protection:
I short circuited the 3V3, 5V0 and the 12V rails in turn. The power supply did shut down, and once the short was removed and the unit switched off for at least one second, resumed normal operation. Although listed here at the beginning of the testing section, I tend to leave this test until the very end, in case it doesn't quite go as planned.
DC Output Voltage Load Regulation:
Mains Input Voltage 110VAC
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Ultra LSX 750W (U12-40874) DC Output Voltage Load Regulation
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Supply = 110VAC/50Hz
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PSU DC Rail
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Measured Voltage(V)
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3V3
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3.45
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5V0
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5.13
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+12V
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12.30
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-12V
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11.66
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5VSB
|
5.20
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Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)
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Ultra LSX 750W (U12-40874) DC Output Voltage Load Regulation
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|||||
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Supply = 110VAC/50Hz
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|||||
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PSU
DC Rail
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Rail Loading Amps (A)
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Rail Loading Watts (W)
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Measured Voltage (V)
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ATX12V V2.2 Limits (V)
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Pass/Fail
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+3V3
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3.26
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11.21
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3.44
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3.135 – 3.465
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Pass
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+5V
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4.88
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25.03
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5.13
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4.75 – 5.25
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Pass
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+12V
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7.75
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95.32
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12.30
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11. – 12.6
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Pass
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-12V
|
0.34
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3.89
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11.44
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10.8 – 13.2
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Pass
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+5VSB
|
2.06
|
10.16
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4.93
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4.75 – 5.25
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Pass
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Total PSU DC Loading = 146W (19% of Rated Maximum Output Power)
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|||||
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Ultra LSX 750W (U12-40874) DC Output Voltage Load Regulation
|
|||||
|
Supply = 110VAC/50Hz
|
|||||
|
PSU
DC Rail
|
Rail Loading Amps (A)
|
Rail Loading Watts (W)
|
Measured Voltage (V)
|
ATX12V V2.2 Limits (V)
|
Pass/Fail
|
|
+3V3
|
8.61
|
29.70
|
3.45
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3.135 – 3.465
|
Pass
|
|
+5V
|
4.87
|
24.88
|
5.11
|
4.75 – 5.25
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Pass
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+12V
|
26.88
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330.35
|
12.29
|
11. – 12.6
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Pass
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-12V
|
0.34
|
3.93
|
11.58
|
10.8 – 13.2
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Pass
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+5VSB
|
2.05
|
10.13
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4.94
|
4.75 – 5.25
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Pass
|
|
Total PSU DC Loading = 399W (53% of Rated Maximum Output Power)
|
|||||
|
Ultra LSX 750W (U12-40874) DC Output Voltage Load Regulation
|
|||||
|
Supply = 110VAC/50Hz
|
|||||
|
PSU
DC Rail
|
Rail Loading Amps (A)
|
Rail Loading Watts (W)
|
Measured Voltage (V)
|
ATX12V V2.2 Limits (V)
|
Pass/Fail
|
|
+3V3
|
8.46
|
28.93
|
3.42
|
3.135 – 3.465
|
Pass
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+5V
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15.24
|
77.88
|
5.11
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4.75 – 5.25
|
Pass
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+12V
|
52.08
|
639.00
|
12.27
|
11. – 12.6
|
Pass
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-12V
|
0.35
|
4.12
|
11.79
|
10.8 – 13.2
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Pass
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+5VSB
|
1.99
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9.79
|
4.92
|
4.75 – 5.25
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Pass
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Total PSU DC Loading = 760W (101% of Rated Maximum Output Power)
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|||||
Mains Input Voltage 230VAC
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Ultra LSX 750W (U12-40874) DC Output Voltage Load Regulation
|
|
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Supply = 230VAC/50Hz
|
|
|
PSU DC Rail
|
Measured Voltage(V)
|
|
3V3
|
3.45
|
|
5V0
|
5.13
|
|
+12V
|
12.31
|
|
-12V
|
11.66
|
|
5VSB
|
5.19
|
|
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)
|
|
|
Ultra LSX 750W (U12-40874) DC Output Voltage Load Regulation
|
|||||
|
Supply = 230VAC/50Hz
|
|||||
|
PSU
DC Rail
|
Rail Loading Amps (A)
|
Rail Loading Watts (W)
|
Measured Voltage (V)
|
ATX12V V2.2 Limits (V)
|
Pass/Fail
|
|
+3V3
|
3.26
|
11.25
|
3.45
|
3.135 – 3.465
|
Pass
|
|
+5V
|
4.84
|
24.83
|
5.13
|
4.75 – 5.25
|
Pass
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|
+12V
|
7.78
|
95.69
|
12.30
|
11. – 12.6
|
Pass
|
|
-12V
|
0.34
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3.89
|
11.46
|
10.8 – 13.2
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Pass
|
|
+5VSB
|
2.06
|
10.18
|
4.94
|
4.75 – 5.25
|
Pass
|
|
Total PSU DC Loading = 146W (19% of Rated Maximum Output Power)
|
|||||
|
Ultra LSX 750W (U12-40874) DC Output Voltage Load Regulation
|
|||||
|
Supply = 230VAC/50Hz
|
|||||
|
PSU
DC Rail
|
Rail Loading Amps (A)
|
Rail Loading Watts (W)
|
Measured Voltage (V)
|
ATX12V V2.2 Limits (V)
|
Pass/Fail
|
|
+3V3
|
8.58
|
29.60
|
3.45
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3.135 – 3.465
|
Pass
|
|
+5V
|
4.88
|
24.94
|
5.11
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4.75 – 5.25
|
Pass
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|
+12V
|
26.79
|
329.25
|
12.29
|
11. – 12.6
|
Pass
|
|
-12V
|
0.34
|
3.93
|
11.58
|
10.8 – 13.2
|
Pass
|
|
+5VSB
|
2.05
|
10.08
|
4.92
|
4.75 – 5.25
|
Pass
|
|
Total PSU DC Loading = 398W (53% of Rated Maximum Output Power)
|
|||||
|
Ultra LSX 750W (U12-40874) DC Output Voltage Load Regulation
|
|||||
|
Supply = 230VAC/50Hz
|
|||||
|
PSU
DC Rail
|
Rail Loading Amps (A)
|
Rail Loading Watts (W)
|
Measured Voltage (V)
|
ATX12V V2.2 Limits (V)
|
Pass/Fail
|
|
+3V3
|
8.57
|
29.30
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3.42
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3.135 – 3.465
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Pass
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|
+5V
|
14.91
|
76.19
|
5.11
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4.75 – 5.25
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Pass
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+12V
|
52.03
|
638.93
|
12.28
|
11. – 12.6
|
Pass
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-12V
|
0.35
|
4.13
|
11.80
|
10.8 – 13.2
|
Pass
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|
+5VSB
|
1.99
|
9.77
|
4.91
|
4.75 – 5.25
|
Pass
|
|
Total PSU DC Loading = 758W (101% of Rated Maximum Output Power)
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|||||
The DC output voltage load regulation of the Ultra LSX 750W power supply is excellent. The 3V3 rail is a little high, but still remained within the limits set down by the ATX12V V2.2 specification. No problems here, so let's move on.
