Page 1:High-Efficiency Power Supplies At A Fair Price
Page 2:Antec HCG-400
Page 3:Antec HCG-400: Measurements
Page 4:Chieftec Nitro 2 85+ BPS-550C2
Page 5:Chieftec Nitro 2 85+ BPS-550C2: Measurements
Page 6:Cougar A350
Page 7:Cougar A350: Measurements
Page 8:Enermax Triathlor 385W
Page 9:Enermax Triathlor 385W: Measurements
Page 10:Test Configuration, Hold-Up Time, And Inrush Current
Page 11:Efficiency According To The 80 PLUS Spec, Standby Power, And Sound Level
Page 12:Which One Of These Power Supplies Is Right For You?
Page 13:Model Comparison Table
Chieftec Nitro 2 85+ BPS-550C2: Measurements
Efficiency According to the 80 PLUS Spec
Efficiency by Load
Chieftec's 550 W PSU comes out swinging, proving that spending a little more on a power supply can make a difference in the efficiency measurements. While it's only 80 PLUS Bronze-certified, it satisfies the efficiency requirements without breaking a sweat. In fact, it exceeds the Bronze standard's requirements by about two percentage points in all three categories, coming close to the Silver standard. On top of that, its standby power is the lowest of all test candidates; so is its inrush current. We repeated the inrush current metric several times to be sure, and the outcome did not change.
The hold-up time of the Chieftec PSU is also quite long at well over 20 ms (at 230 V, you're looking at a hold-up time of 24.6 ms without electricity). The ripple and noise values are within spec. They're not excellent, but within the ATX standard, which we consider to be OK. The PSU's sound level is average among the test candidates.
A Close Look at the PCB
After cutting open the riveted enclosure, we figured out that the OEM manufacturer is Channel Well Technology in Taiwan. The input filter is partially located on a separate PCB, adjacent to the mains socket. Here we find two Y capacitors and one X capacitor. Four additional Y capacitors sit on the main PCB, along with another X capacitor, a MOV, and three choke coils. The capacitors are manufactured by Nippon Chemi-Con. The soldering quality is OK.
- High-Efficiency Power Supplies At A Fair Price
- Antec HCG-400
- Antec HCG-400: Measurements
- Chieftec Nitro 2 85+ BPS-550C2
- Chieftec Nitro 2 85+ BPS-550C2: Measurements
- Cougar A350
- Cougar A350: Measurements
- Enermax Triathlor 385W
- Enermax Triathlor 385W: Measurements
- Test Configuration, Hold-Up Time, And Inrush Current
- Efficiency According To The 80 PLUS Spec, Standby Power, And Sound Level
- Which One Of These Power Supplies Is Right For You?
- Model Comparison Table