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Antec Signature 850W Review

paulktreg    -   September 18, 2008
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Testing:

For more information on our testing system, please browse our testing methodology.

Electrical Safety:

 

 

 

 

 

 

 

Electrical Safety Test Class 1
Manufacturer/Model
Pass/Fail
Antec Signature 850W
Pass

 

Short Circuit Protection:

I short circuited the 3V3, 5V0 and all four 12V lines 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 to plan.

DC Output Voltage Load Regulation

I have again tested at 240VAC and 110VAC. This will provide extra information for those of you using the lower mains input voltage. Before you say it should be 120VAC, all I can say at this stage is I haven't been able to lay my hands on a Variac. The 110VAC test has been performed using a power tool isolation transformer commonly found on building sites up and down the country. The difference between the results at 110VAC and 120VAC will be negligible, as will the frequency difference of 50 or 60Hz. I have tried to space my load tests evenly over the full range, result tables below, and I have included the information in graphical form for the first time. The output voltages for the 12V1,12V2, 12V3 and 12V4 lines are very close, and I have plotted an average of the four voltages for the graphs.

Testing @ 110VAC:

 

 

110VAC - Total Load at 172W which is 20% of Rated Maximum Output Power.

PSU
DC Line
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.31
3.11
10.29
3.135 – 3.465
Pass
+5V0
5.03
4.66
23.44
4.75 – 5.25
Pass
+12V0(1)
12.09
2.56
30.95
11.4 – 12.6
Pass
+12V0(2)
12.09
2.56
30.95
11.4 – 12.6
Pass
+12V0(3)
12.08
2.55
30.80
11.4 – 12.6
Pass
+12V0(4)
12.07
2.54
30.66
11.4 – 12.6
Pass
-12V0
11.97
0.36
4.31
10.8 – 13.2
Pass
+5VSB
4.98
2.12
10.56
4.75 – 5.25
Pass
Total Power Supply Loading
172W
 

 

110VAC - Total Load at 472W which is 56% of Rated Maximum Output Power.

PSU
DC Line
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.29
7.79
25.63
3.135 – 3.465
Pass
+5V0
5.01
9.19
46.04
4.75 – 5.25
Pass
+12V0(1)
12.07
8.01
96.68
11.4 – 12.6
Pass
+12V0(2)
12.07
8.02
96.80
11.4 – 12.6
Pass
+12V0(3)
12.05
7.99
96.28
11.4 – 12.6
Pass
+12V0(4)
12.05
7.99
96.28
11.4 – 12.6
Pass
-12V0
11.96
0.36
4.31
10.8 – 13.2
Pass
+5VSB
4.96
2.12
10.51
4.75 – 5.25
Pass
Total Power Supply Loading
472W
 

 

110VAC - Total Load at 809W which is 96% of Rated Maximum Output Power.

PSU
DC Line
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.26
17.77
51.41
3.135 – 3.465
Pass
+5V0
4.97
19.10
94.93
4.75 – 5.25
Pass
+12V0(1)
12.04
13.49
162.42
11.4 – 12.6
Pass
+12V0(2)
12.04
13.48
162.30
11.4 – 12.6
Pass
+12V0(3)
12.02
13.46
161.79
11.4 – 12.6
Pass
+12V0(4)
12.02
13.45
161.67
11.4 – 12.6
Pass
-12V0
11.94
0.36
4.30
10.8 – 13.2
Pass
+5VSB
4.90
2.10
10.29
4.75 – 5.25
Pass
Total Power Supply Loading
809W
 

 

Testing @ 240VAC:

 

 

240VAC - Total Load at 172W which is 20% of Rated Maximum Output Power.

PSU
DC Line
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.31
3.09
10.23
3.135 – 3.465
Pass
+5V0
5.05
4.66
23.53
4.75 – 5.25
Pass
+12V0(1)
12.09
2.56
30.95
11.4 – 12.6
Pass
+12V0(2)
12.09
2.56
30.95
11.4 – 12.6
Pass
+12V0(3)
12.08
2.55
30.80
11.4 – 12.6
Pass
+12V0(4)
12.08
2.55
30.80
11.4 – 12.6
Pass
-12V0
11.98
0.36
4.31
10.8 – 13.2
Pass
+5VSB
5.00
2.12
10.60
4.75 – 5.25
Pass
Total Power Supply Loading
172W
 

 

240VAC - Total Load at 472W which is 56% of Rated Maximum Output Power.

PSU
DC Line
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.28
7.80
25.58
3.135 – 3.465
Pass
+5V0
5.00
9.20
46.00
4.75 – 5.25
Pass
+12V0(1)
12.06
8.01
96.60
11.4 – 12.6
Pass
+12V0(2)
12.06
8.03
96.84
11.4 – 12.6
Pass
+12V0(3)
12.05
8.00
96.40
11.4 – 12.6
Pass
+12V0(4)
12.05
7.99
96.28
11.4 – 12.6
Pass
-12V0
11.95
0.36
4.30
10.8 – 13.2
Pass
+5VSB
4.95
2.12
10.49
4.75 – 5.25
Pass
Total Power Supply Loading
472W
 

 

240VAC - Total Load at 811W which is 96% of Rated Maximum Output Power.

PSU
DC Line
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.26
15.91
51.87
3.135 – 3.465
Pass
+5V0
4.96
19.20
95.23
4.75 – 5.25
Pass
+12V0(1)
12.03
13.52
162.64
11.4 – 12.6
Pass
+12V0(2)
12.03
13.52
162.64
11.4 – 12.6
Pass
+12V0(3)
12.02
13.51
162.39
11.4 – 12.6
Pass
+12V0(4)
12.01
13.50
162.13
11.4 – 12.6
Pass
-12V0
11.93
0.36
4.29
10.8 – 13.2
Pass
+5VSB
4.89
2.10
10.27
4.75 – 5.25
Pass
Total Power Supply Loading
811W
 

 

 

These are some of the best results I have seen from any power supply I have so far tested. The +12V rails at no time dropped below 12.0V, which is really excellent. Absolutely no problems so far.




  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specifications & Features
  4. Testing: Load Testing at 110VAC & 230VAC
  5. Testing: Efficiency & Power Factor
  6. Testing: Temperature, Noise Levels & Fan Speeds
  7. Conclusion
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