Reviews - Pico PSU Round Up
Sample Provided by: Logic Supply (By jonny on Tue, Nov-09-2010)

Page 8 - Power brick conclusions

Normally we score power supplies based on performance, value, aesthetics and functionality. Today, we're going to focus only on performance and break that down into numbers that will average out to become our final score. Efficiency, voltage regulation and ripple suppression.

First let's grade the power bricks by themselves, starting with the EDAC 102W:

Efficiency: Efficiency was good hitting 81%, 85% and 83% at our different loads. I'm giving this PSU a 9 here.

Voltage regulation: Regulation was only fair with a 2.5% drop in +12V going from test 1 to test 4. Score here is a 7.

Ripple suppression: Ripple doesn't look too bad. It's within spec, which is 120mV, but only barely coming in at 100mV during test 4. For this, this unit gets a score of 7.5.

Efficiency

9

Regulation

7

Ripple

7.5

Total Score

8

Now for the EDAC 120W:

Efficiency: Efficiency didn't start out as good as the 102W, but it ended up getting better at the end by hitting 86%. This PSU gets a 9 here.

Voltage regulation: Regulation was a bit better with the 120W, only dropping 1.6%. Score here is an 8.5.

Ripple suppression: Ripple here is much better, topping out at only 50mV, and with less noise to boot. For this, this unit gets a score of 8.5.

Efficiency

9

Regulation

8.5

Ripple

8.5

Total Score

8.5

 

Now for the FSP 19V power brick:

Efficiency: Efficiency was fantastic on this FSP unit, hitting as high as 89%. The FSP earns a 10 here.

Voltage regulation: The regulation on the FSP 19V unit is fantastic with voltages dropping only .06% going from test 1 to test 4. Score here is a 10.

Ripple suppression: Ripple suppression on this unit is better than the EDAC 102W, but not as good as the EDAC 120W. For this in-between performance, this unit gets an in-between score of 8.

Efficiency

10

Regulation

10

Ripple

8

Total Score

9.5

For the first time ever, jonnyGURU.com can give a "jonnyGURU Recommended" to a power brick. I believe this is also the first time jonnyGURU.com has given a "jonnyGURU Recommended" to an FSP product!

Of course, the performance of the power brick is less than half of the story here. As we've seen, when you hook these up to a PicoPSU, the story completely changes. So on the next two pages, we're going to score all four PicoPSU's with each of the power bricks used to power them and see which one comes out on top...



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