Voltage Regulation

+3.3V Regulation
Load Voltage
10% +1.58%
20% +1.21%
50% +0.15%
80% -1.06%
100% -1.61%
110% -2.27%

 

+5V Regulation
Load Voltage
10% +0.74%
20% +0.46%
50% -0.30%
80% -1.10%
100% -1.70%
110% -2.04%

 

+12V Regulation (Worst Rail)
Load Voltage
10% +1.01%
20% +0.81%
50% +0.19%
80% -0.35%
100% -0.77%
110% -0.96%

First we take a look at the voltage regulation. All rails start relatively close to their optimal values. +3.3V and +5V reached about -2% during overload which is decent. The four +12V rails show even better results. Even the worst rail stays over -1% at highest load. FSP has btw. no problems with dynamic loads. We saw some tests from 50Hz to 10KHz where the load current decreased after a small duration with satisfying voltage results.

Ripple and Noise

+3.3V Ripple Quality
Load Ripple and Noise
10% 26mV
20% 23mV
50% 31mV
80% 38mV
100% 42mV
110% 44mV

 

+5V Ripple Quality
Load Ripple and Noise
10% 18mV
20% 18mV
50% 21mV
80% 30mV
100% 40mV
110% 46mV

 

+12V Ripple Quality (Worst Rail)
Load Ripple and Noise
10% 30mV
20% 32mV
50% 45mV
80% 72mV
100% 97mV
110% 116mV

These ripple & noise measurements tell us that this Gold series was planed as an affordable offer while most other 80Plus Gold PSUs show better results -- for much higher prices. +5V and +12V are very close to 1% ripple & noise. However all rails are within ATX specification and most PC systems shouldn't reach 100% load or more. Those results from the +3.3V rail with 26mV at low load and 23mV at a higher load are very unusual.

FSP HQ Aurum CM 750W Test Report 2
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14 Comments

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  • Zap - Saturday, July 23, 2011 - link

    The flat modular cables look pretty nice! Reply
  • Martin Kaffei - Saturday, July 23, 2011 - link

    Well, I like them more than the ones from Corsair since they have no real sleeving like FSP. Therefore Corsair uses a better design. Reply
  • futurepastnow - Sunday, July 24, 2011 - link

    I've owned a couple of FSP power supplies. I've always thought of them as makers of high-quality but low-polish PSUs... stable voltages and no problem delivering their rated output, but noisy and inefficient, with unsleeved cables. Nice to see they're addressing those shortcomings.

    As a side note- Isn't it interesting how many companies are headquartered in Taiwan, enemy of China, with factories on the mainland?
    Reply
  • Martin Kaffei - Monday, July 25, 2011 - link

    Taiwan is not an enemy, it's more like another interpretation of China (or what it could be). In addition Taiwan is just semi-independent. No reason for China to see their activities as provocations at the moment. Reply

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