OCZ EvoStream 600w Modular PSU

Testing

Load Testing

In order for the results from all current and future PSU reviews to remain fair and comparable, Overclock3D uses a custom built Power Supply load stress tester.

The tester will be placing the following loads on each of the EvoStream's rails:

+3.3v - 20a Load
+5.0v - 20a Load
+12v1 - 10a Load
+12v2 - 10a Load
+12v3 - 10a Load
+12v4 - 10a Load

The results are collected from a Mastech MAS-345 Multimeter which logs its readings via RS232 to a PC.

OCZ EvoStream 600w +3.3v OCZ EvoStream 600w +5.0v

OCZ EvoStream 600w +12v1 OCZ EvoStream 600w +12v2

OCZ EvoStream 600w +12v3 OCZ EvoStream 600w +12v4

From the graphs above we can see that the EvoStream managed good voltage stability across all rails, staying well within ATX specifications and keeping fluctuation under 0.10v in most cases.


Efficiency Testing

Efficiency tests are performed by measuring the wattage consumed by the power supply at the mains against the power (in watts) consumed by the OC3D power supply stress tester. These results may not be 100% accurate, but have proven to be extremely close to results obtained from professional equipment.

OCZ EvoStream 600w Efficiency

The EvoStream was placed under a load of 646 watts. This counts for a total of 107% of the power supplies rated output. At this load, the power supply required 831 watts from the mains. Therefore the efficiency of this power supply can be found by a simple equation: (646 / 831) * 100, which works out to be an efficiency rating of 77.7%.


Noise Testing

Possibly the hardest part of any PSU review is summarising the level of noise given out by the unit. The threshold for what is considered 'noisy' varies from person to person and therefore what I may consider a quiet unit, another person may consider extremely loud. A common way to resolve this issue is to use a dBA meter to measure the units noise level, however this doesn't take into account the pitch (type) of noise emitted and whether it is likely to irritate end users.

For this reason OC3D records all power supplies at idle and load in wav format for you to make your own informed decisions. All recordings are taken at 30cm away from the PSU and outside of a PC case. You will need to remember that noise levels will be reduced by varying amounts once the PSU has been installed inside your PC enclosure.

Idle Recording - Download
Load Recording - Download

As you can probably hear from the recordings above, the EvoStream is not a silent power supply. At idle the fan is clearly audible both inside and outside of a PC case, and left me wondering if the fan really did need to run so fast as very little heat was pushed out of the unit. At load the fan speed increased significantly making the unit louder still. Personally I would not recommend this power supply for anybody seeking a silent PC setup.

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Most Recent Comments

30-10-2006, 10:01:26

JN
"What do you get when you cross a OCZ PowerStream with an ModStream? An EvoStream of course! Today I'll be testing out OCZ's latest addition to their PSU range that is set to take the place of the ageing ModStream unit."

Linky

30-10-2006, 10:47:35

llwyd
nice review and nice looking psu.....cept for the modular system.... thats just manky

30-10-2006, 11:22:12

JN
Quote:
Originally Posted by name='llwyd'
nice review and nice looking psu.....cept for the modular system.... thats just manky
Would have looked much much better in black for sure

30-10-2006, 11:28:45

ai_01
Quote:
Originally Posted by name='XMS'
Would have looked much much better in black for sure
yes it would. the finish on the box is freakin sexy thou. good review as usual.

30-10-2006, 17:41:23

mrapoc
i cant see the pics of the unit

30-10-2006, 18:10:26

FarFarAway
Quote:
Originally Posted by name='mrapoc'
i cant see the pics of the unit
Clear your cache. Works fine for me

31-10-2006, 18:57:39

Hyper
Another good review mate.

I must admit, the pictures seem a much higher quality now
Reply
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