Coolermaster Extreme Power Plus 550W

Published: August 19, 2009
Author: Amber Lupala
Editor: Amber Lupala
Provider: Coolermaster

Features and specs

We are taking a look at a PSU from Coolermaster today which is one of their cheaper versions on the market, it will go together with one Coolermaster case that we are reviewing later on, but for now we will test this PSU to see what type of numbers we can get out of it.

About Coolermaster:

Check out their website,


Compliance with the newest Intel standard ATX 12V V2.3
More than 70% better efficiency at typical load operation
High reliability (MTBF > 100,000 hrs)
Green power design to meet Energy Star and Blue Angel requirements
Multiple protection design(OVP/OCP/OPP/SCP)
Support dual +12V1 and +12V2 outputs for higher power usage


Power Supply Extreme Power Plus 500W
Type INTEL Form Factor ATX 12V V2.3
Input Voltage 90 ~ 132V / 180 ~ 264V (Selectable)
Input Current 10 A @ 115 Vac / 6 A @ 230 Vac
Input Frequency Range 47 ~ 63 Hz
Power Good Signal 100 ~ 500 ms
Hold Up Time > 17 ms
Efficiency > 70% Typically
MTBF > 100,000 hrs
Protection OVP / OCP / OPP / SCP
Operation Temperature 0 ~ 40oC (Nominal Input Voltage)
Safety Nemko / TUV / cUL / CE / BSMI / FCC / C-tick / CCC (Passive Model Only)
Fan Sleeve bearing 120mm super silent fan

The Product:

Coolermaster Extreme Power Plus 550W Coolermaster Extreme Power Plus 550W
Please click on thumbnails to get bigger pictures

I said that this PSU is one of the cheaper lines that Coolermaster has released and we can see that already on the box. Since it’s inexpensive will it performing well? On the box you will find a picture of the PSU and the box comes in white and purple which are the familiar Coolermaster colors.

On the back of the box you can read about the various features and specifications.

Coolermaster Extreme Power Plus 550W Coolermaster Extreme Power Plus 550W
Please click on thumbnails to get bigger pictures

With the PSU you will get a power cable (EU in my case), manual and a zip lock bag with four screws for mounting. The case of the PSU is is black with a silver fan grill on the bottom.

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  • monica

    dove posso trovarlo per prenderlo?