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Lian Li Silent Force 850W Review

paulktreg    -   December 8, 2008
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Testing (Continued):

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

Output & Efficiency at 110VAC
DC Load (W)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
0
1
0.34
N/A
N/A
177
222
0.95
80
Pass
466
557
0.98
84
Pass
860
1097
1.00
78
Pass

 

Output & Efficiency at 230VAC
DC Load (W)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
0
9
0.32
N/A
N/A
177
217
0.82
82
Pass
462
543
0.91
85
Pass
864
1050
0.94
82
Pass

 

One thing I have noticed throughout testing power supplies is best power factor at 110VAC, and best efficiency at 230VAC, which is once again the case with the Lian Li Silent Force 850W. The measurements however, do not meet the requirements of the stated 80 Plus certification. The efficiency drops below 80% at 110VAC and the power factor drops below 0.9 at 230VAC. I have however, technically speaking, subjected the power supply to a minor overload, but I feel dropping the load to exactly 850W would of made little or no difference to the efficiency or power factor measurements.

The Lian Li Silent Force 850W does meet the requirements of the ATX12V V2.2 specification and therefore, despite some minor failures against its quoted specification, still gains a pass in this section.

 

AC Ripple On DC Outputs:

 

Ripple/noise levels at 110VAC and 230VAC are virtually identical (slightly lower at 110VAC if anything, which is to be expected) and I have therefore included screenshots and values for  230VAC only.

 

AC Ripple On 3V3 Rail at 230VAC

(Amplitude: 10mV/div | Timebase: 10uS/div)

 

AC Ripple On 5V0 Rail at 230VAC

(Amplitude: 10mV/div | Timebase: 10uS/div)

 

AC Ripple On 12V Rail at 230VAC

(Amplitude: 50mV/div | Timebase: 10uS/div)

 

Lian Li Silent Force 850W AC Ripple/Noise Measurements

DC Output
+3V3
+5V0
+12V
-12V0
+5VSB
Ripple (mV p-p)
30
60
70
70
40
Pass/Fail
Pass
Fail
Pass
Pass
Pass

 

The ripple/noise level on the 5V0 rail is slightly higher than the ATX12V V2.2 permits with all other levels within specification.

 




  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing: DC Voltage Load Regulation At 110VAC & 230VAC
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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