Page 1:Profits Or Quality?
Page 2:Still An Eldorado? 600 Percent Profit Margin Possible
Page 3:Our Motivation - Why Are We Running PSUs Constantly Under Full Load?
Page 4:Test Methodology
Page 5:Stressing With Highly Accurate Electronic Loads
Page 6:Noise Level And Measurement Of Temperatures
Page 7:Data Collection And Live Upload
Page 8:AcBel ATX-550CA -AB8FM: Failure - But 10-Year Warranty
Page 9:Antec Phantom 500: Quiet With High Efficiency
Page 10:Antec True Power 2.0: Mediocre Efficiency
Page 11:Aopen Prima Power 700: Super Results - No SLI
Page 12:BeQuiet BQT B5-520W-S1.3: Loose Transistor Triggers Failure
Page 13:Cooler Master Real Power RS-550-ACLY: Shutdown At Full Load
Page 14:Enermax Coolergiant EG485AX-VHB(W): Flawed Former Champ
Page 15:Enermax Noisetaker EG701AX-VE(W): Perfect Connections And Quiet
Page 16:Epower Silent Engine Xscale 470: Loud At Full Load
Page 17:Fortron FSP300-60GNF: Soundless With High Efficiency
Page 18:HEC AcePower ACE580UB: Failure At High Load
Page 19:Hiper Type R580: Not Within Specifications
AcBel ATX-550CA -AB8FM: Failure - But 10-Year Warranty
The 550 watt Acbel did not make it through the test. Nonetheless, the manufacturer offers a 10-year warranty - probably a new record.
The graphic above shows the power supply connections and their length in centimeters. The AcBel has sufficient connections. There is no second connection for another graphics card in SLI operation.
Behind the cryptic product description ATX-550CA-AB8FM, which could only have been created by engineers, is a well-made power supply unit from the 550 watts class. It is equipped with a 120 mm cooling fan and the reflective outer surface is painted gray. However, the unit is not completely user-friendly: an adapter is necessary for SLI operation of graphics cards. On the other hand, AcBel already has an 8 pin voltage connector for dual-core processors. On the down side, the ambitious user will miss pluggable leads, making cable spaghetti a problem when it comes to cooling or getting a good overview of what's in the PC housing. In view of the product's sample status, we can excuse the fact that it is equipped with a non-divisible 24 pin ATX-connector. Here, you have to buy an adapter for most systems so that the power supply unit can even be used.
The AcBel 550CA with 550 watts is now ready to go
The AcBel 550CA operating in the dark.
Identification plate with power ratings.
Already after the first few hours of operation it became clear that the power supply unit from AcBel could not keep up its voltages in accordance with ATX specifications. The 3.3 volts cable collapsed under maximum load at 3.09 volts, which in practice could lead to a system crash.
Input: 716 watts (209 volts, 3.46 ampere, cosphi 0.99)
Output: 550 watts (26.4 ampere/3.3 volts, 20.0 ampere/5 volts and twice 15.0 ampere on 12 Volt, 20 watts on -5/-12 volts, 5 volts standby)
Efficiency at maximum load: 76.8 percent (166 watts dissipation increases the air temperature by just under 7° Celsius
Noise reading at maximum load: 61.1 dB(A) in 4.72 inch (12 cm) gaps
Storage oscillo-scope: Here it shows that on the 3.3 volts cable a fluctuation of 40 mV and for the 12 volts string a difference of 70 mV occurs. This is all within the specifications.
For the first 12 volts cable it's 12.09 volts, for the second 12 volts voltage (CPU) it's 11.99 volts, for the 5 volts cable it's 4.76 volts and for the 3.3 volts cable it's 3.09 volts. The specification defines 3.14 volts as lower limit.
|AcBel ATX-550CA-AB8FM (550 watts)|
|Test Phase 1|
|Test Description||Lower Limit||Upper Limit||Result|
|Increase load from 20% to 100% of nominal load limit||110 watts||550 watts||Passed|
|Test Phase 2|
|Steady load at 100% nominal load||550 watts||Passed|
|Test Phase 3|
|Power Rail||Measurement||Min/Max according to ATX Spec.||Result|
|+ 3.3 V||+ 3.09 V||+/- 5% (+3.14 to +3.46 V)||Failed|
- Profits Or Quality?
- Still An Eldorado? 600 Percent Profit Margin Possible
- Our Motivation - Why Are We Running PSUs Constantly Under Full Load?
- Test Methodology
- Stressing With Highly Accurate Electronic Loads
- Noise Level And Measurement Of Temperatures
- Data Collection And Live Upload
- AcBel ATX-550CA -AB8FM: Failure - But 10-Year Warranty
- Antec Phantom 500: Quiet With High Efficiency
- Antec True Power 2.0: Mediocre Efficiency
- Aopen Prima Power 700: Super Results - No SLI
- BeQuiet BQT B5-520W-S1.3: Loose Transistor Triggers Failure
- Cooler Master Real Power RS-550-ACLY: Shutdown At Full Load
- Enermax Coolergiant EG485AX-VHB(W): Flawed Former Champ
- Enermax Noisetaker EG701AX-VE(W): Perfect Connections And Quiet
- Epower Silent Engine Xscale 470: Loud At Full Load
- Fortron FSP300-60GNF: Soundless With High Efficiency
- HEC AcePower ACE580UB: Failure At High Load
- Hiper Type R580: Not Within Specifications