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    OCZ ModStream 520W PSU
    Author: JonnyGuru
    Date Posted:06/04/2005 12:52.05
    SLRating: SLRating: 9.5/10
    Bottom Line: OCZ started out as a performance memory company. When they came out with power supplies JonnyGuru was sceptical but at just over $100, it's probably the best power you can get for the money.

    Find the lowest price for this product
    Pages: 1 2 3 4
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    Results and Conclusions

    OCZ ModStream 520W Zero Load Test One (367W) Test Two (302W) Test Three (430W) Full Load (620W)
    12V 11.44 11.94 12.46 11.64 12.28
    5V 5.32 5.09 4.99 5.13 4.91
    3.3V 3.44 3.34 3.34 3.33 3.28
    Efficiency 48% 76% 77% 73% 65%
    Power Factor .53 .76 .77 .73 .65

    Temperature under load = 16.7C. Peak temperature after power off = 48.8C.

    Phenomenal!  Of course, when your expectations are "520W" load and you're given a 620W power supply (as per OCZ's own label,) how can you be let down?

    At 620W the temperatures, despite the ever-quiet 120MM fan, never went over 18C.  Sure, the efficiency dropped to 65%, but if you're squeezing 620W out of this power supply for long enough periods that would allow a 65% efficiency to make a difference, then you're doing something with your PC that you shouldn't!

    The voltage was stable during all tests.  The efficiency was good and the power factor was good for a power supply without active PFC.

    Clearly, this power supply gets a 10 for performance.  It just can't get much better than this, and for just over $100, it's probably the best power you can get for the money.

    For features, the power supply has some downfalls.  The modular connectors have all of the ugliness of the Mad Dog or A.C. Ryan with the ends of an Ultra X-Connect (no clips!)  They had stainless steel braiding and clear, UV reactive tubing over them making them stiff (although they looked cool under UV light.)  There wasn't many power connectors (even IF you use SATA drives,) but at least is was quiet and STAYED quiet even under a 620W load.  All said, the power supply gets an 9 for features. 

    That means the total score for this power supply is 9.5 and we have ourselves another SLCentral editor's choice!  The PC Power and Cooling Turbo Cool 510 and the Ultra X-Finity 600W are in good company.

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    1. Introduction
    2. First Impressions
    3. Label and Specifications
    4. Results and Conclusions

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