Rosewill Capstone 450W and 650W 80Plus Gold
by Martin Kaffei on March 21, 2012 8:00 AM EST- Posted in
- Cases/Cooling/PSUs
- PSUs
- Rosewill
- Capstone
- 80 Plus Gold
Voltage Regulation
| +3.3V Regulation/Ripple and Noise | |
| Load | Voltage |
| 5% | +1.52% (3mV) |
| 10% | +1.52% (5mV) |
| 20% | +1.52% (9mV) |
| 50% | +0.91% (10mV) |
| 80% | +0.61% (14mV) |
| 100% | +0.30% (15mV) |
| 110% | +0.00% (17mV) |
| Crossload +12V max. | +0.91% |
| Crossload +3.3V/+5V max. | +0.30% |
| +5V Regulation/Ripple and Noise | |
| Load | Voltage |
| 5% | +3.00% (5mV) |
| 10% | +2.60% (6mV) |
| 20% | +2.60% (7mV) |
| 50% | +2.20% (11mV) |
| 80% | +1.60% (14mV) |
| 100% | +1.40% (16mV) |
| 110% | +1.00% (17mV) |
| Crossload +12V max. | +1.40% |
| Crossload +3.3V/+5V max. | +-0.00% |
| +12V Regulation (Worst Ouput)/Ripple and Noise (Worst Output) | |
| Load | Voltage |
| 5% | +1.58% (8mV) |
| 10% | +1.58% (9mV) |
| 20% | +1.42% (14mV) |
| 50% | +1.25% (21mV) |
| 80% | +1.08% (26mV) |
| 100% | +1.08% (39mV) |
| 110% | +1.00% (40mV) |
| Crossload +12V max. | +1.08% |
| Crossload +3.3V/+5V max. | -0.08% |
Noise Levels
| Loudness (subjective) | |
| Load | Opinion |
| 5% | audible fan bearing |
| 10% | audible fan bearing |
| 20% | low rotation noise |
| 50% | low rotation noise |
| 80% | rotation noise |
| 100% | strong fan noise |
| 110% | strong fan noise |
Efficiency and PFC
| Efficiency and Power Factor 230 VAC | ||
| Load | Efficiency | PFC |
| 5% | 81.52% | 0.797 |
| 10% | 87.21% | 0.810 |
| 20% | 91.35% | 0.839 |
| 50% | 92.11% | 0.949 |
| 80% | 91.52% | 0.979 |
| 100% | 90.74% | 0.981 |
| 110% | 90.14% | 0.984 |
| Efficiency and Power Factor 115 VAC | ||
| Load | Efficiency | PFC |
| 5% | 78.41% | 0.842 |
| 10% | 85.58% | 0.910 |
| 20% | 90.94% | 0.942 |
| 50% | 91.84% | 0.966 |
| 80% | 91.12% | 0.979 |
| 100% | 90.46% | 0.988 |
| 110% | 90.12% | 0.991 |
Both power supplies are almost identical. In addition small Gold PSUs are rare so we focus on the smaller model this time. The Rosewill CapStone 450W can deliver the specified power and even a bit more. The ripple and noise is low on all outputs, especially on +3.3V and +5V where less than 0.34% can be achieved. The efficiency is likewise well above the necessary values for 80 Plus Gold. Even at 10% the PSU was able to reach 87% (230V input)—an impressive result. In fact this PSU is close to 80Plus Platinum.
The power factor reaches a maximum of 0.991, again with rather low PFC results on 230VAC. Under load the power supply is clearly audible, and the fan's bearing can be heard sometimes. However, there isn't any background noise from the electronics. During the crossload tests +3.3V, +5V and +12V were within ATX specification. With 3% over the optimal value +5V starts quite high.
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33 Comments
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MeanBruce - Saturday, March 24, 2012 - link
Wow, I started reading some comments, and gee all this discussion however constructive, seems so many better things to do, especially on a Saturday! Make it simple on yourself, purchase a Corsair AX850 or one of the upcoming Corsair platinums and never read another PSU review for the entire 7year warranty, life is way too short if you ask me!;)zootjeff - Thursday, June 21, 2012 - link
Any ideas how well these work without minimum load? Many of us tinkers and hackers like to use ATX power supplies for other things. Like a 12V power supply with 5VSB. In my application I'm looking for a 80 Plus Gold where I just draw 100mA to 20 amps of 12v and Zero 3.3 and 5v.. How well regulated is the 12v with no load on the 3.3 and 5?Thanks,
-
Jeff
RosewillEye - Friday, May 10, 2013 - link
Thank you for posting the article. The details are very precise, and get all questions answered. Feedback from owners of the Capstone series is much appreciated, and we're glad to see them being discussed. Rosewill aims to continue to combine great quality with great value.