Noise Levels

Hold Up Time
Load time (ms)
+3.3V 24.52
+5V 21.84
+12V (best) 22.14
+12V (worst) 22.08
+5V (Standby) 73.00
-12V 36.00

In the FSP HQ we were able to measure the Hold Up Time at full load. With minimum 21-22ms all rails reach more than the required ATX values (>17ms). +3.3V is able to deliver stable power during a 24.52 ms long power failure.

Efficiency and PFC

115VAC, 60Hz
Load        Efficiency PFC
10% 87% 0.953
20% 90% 0.976
50% 91% 0.996
80% 89% 0.998
100% 87% 0.998
110% 86% 0.999


230VAC, 50Hz
Load        Efficiency PFC
10% 85% 0.904
20% 90% 0.950
50% 92% 0.985
80% 90% 0.991
100% 89% 0.993
110% 89% 0.994

Here we can see more uncommon results. At 10% load the PSU reached a high efficiency with 115V input voltage while the 230VAC measurements are worse. Lower current is usually easier to handle. With more than 0.904 the power factor is very high in all power grids. In addition up to 92% efficiency is a good result -- even for an 80Plus Gold power supply.



Finally we added some EMC charts from the Audix Technology Corporation. These graphs show the EMI emission in dBμV over the phase and neutral conductor. Note that the X-axis is divided in different frequencies and not time like an oscillogram. As you can see the interference level is low and within the EN55022 EU standard. AV stands btw. for the arithmetic average of an envelope while the upper red line shows the QP limit. The QuasiPeak value is an "impression" of the overall emission (quantity and quality of the amplitudes).

This is an interesting aspect since most editors can't measure such things. Not entirely coincidental I know some results from other PSUs. The Sirtec 80Plus Gold design e.g. failed in these EMC tests many times and most cheaper PSUs have one or more frequency where they got problems with these limits. EMIs are a difficult problem. A single component can change everything here.

All Aurum CM models (550, 650, 750W) use flat peripheral cables while the fixed ones have a common cable sleeving. FSP offers 5 years warranty and a special case design with arrowy ventilation holes, which took a long time for planning. FSP uses a 120mm fan with a fluid dynamic bearing. These kinds of fans live long but they also have one disadvantage. During the start there is not much pressure which induces mixed friction.

Aurum CM 750W Test Report 1 A Short Conclusion
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  • kenyee - Thursday, July 21, 2011 - link

    No price for the Aurum?
    And where can you get it?
  • the-bink - Thursday, July 21, 2011 - link

    In Holland I payed 90 euro incl. shipping, for the 700 watt version without the modular cables (FSP Aurum 700). I have been very happy with mine (Computer: 5850*2, 10HD's, Q9550@3.6GHz, etc., etc.).

    Also see the review at:
  • bigboxes - Thursday, July 21, 2011 - link

    1. Ugly
    2. Fool me once...
  • mino - Monday, July 25, 2011 - link


    FSP's products are almost allways in the "You-get-what-you-pay-for" class. This goes for the high-end as well as low end parts.

    Please consider that FSP has a huge range and DOES produce low-end (even if not "trash"-end) parts.

    To my experience, most of the time, they are either cheapest or on par with competition at a given price point. Though nobody does miracles for peanuts in the PSU business ...
  • grandleaf - Thursday, July 21, 2011 - link

    $155 is too expensive.
    I picked a Seasonic X-760 at Microcenter one months ago for $149.
  • Crazymech - Thursday, July 21, 2011 - link

    It's nitpicking, but I'm disliking the use of the by the way abbrevation.

    Is a full review upcomming? I'm having a bit hard time getting any solid information except for the numbers from this 'rushed' article.

    But on the other hand, I never say no to more content from Anandtech, it was worth the time reading it :).
  • iamkyle - Thursday, July 21, 2011 - link

    Can we finally compile all these PSU reviews into say the "Anandtech PSU Charts" so we can really compare the ones you review?
  • etamin - Thursday, July 21, 2011 - link

    You can get a seasonic x750 gold on newegg right now for 166 shipped. It's a shame there are so few 100% modular psus with quality performance and conservative designs.
  • ratbuddy - Saturday, July 23, 2011 - link

    What use would a 100% modular PSU be? Everyone's going to use at least the 24 pin and CPU connectors, no reason to add cost making those detachable.
  • dhiiir - Friday, July 22, 2011 - link

    Fast economic development, science and technology quickly.Is a full review upcomming? I'm having a bit hard time getting any solid information except for the numbers from this 'rushed' article.The store's products, the quality is really good. Cheap, authentic. There are genuine brand-name shoes and clothes. Now share it with I believe you will like it.

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