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Old 05-13-2008, 04:06 PM   #1
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Default AcBel Polytech iPower 660 Power Supply Review

There has been a new article posted.

Title: AcBel Polytech iPower 660 Power Supply Review
URL: http://www.hardwaresecrets.com/article/552

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"AcBel Polytech is a very well known OEM manufacturer, producing power supplies for brands such as Cooler Master. Now they seem interested in the retail market and today we are going to completely diss..."

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Old 05-21-2008, 11:54 PM   #2
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Temperature issues again. Did I hear AcBel claiming their i8 series based on this very design "can stably overclock 100W"? Can AcBel say THAT again?

Well there might be two kind of problems causing this unit to shut down.

The first possible cause is the unit IS overheated. With proper thermal sensors we can measure the temperature of the primary/secondary heatsink or main transformer to confirm that issue.
The second possible cause is the unit's OTP circuit is not correctly tweaked, which means the OTP is set too sensitive and triggers the protection under a normal temperature.

It is a shame for AcBel this time, not because the iPower 660 is group-regulated, but because it's not properly finished.
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Old 09-28-2009, 10:52 PM   #3
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Quote:
... a power supply that was labeled at 25 C. The problem is that no computer in the world works internally at such low temperature
I agree that this doesn't seem to be the best PSU out there, and the thermal limitations are way too low.

Still, it's easy to feed the PSU cool air if the right computer case is used. Many cases nowadays are designed to feed the PSU air of more or less room temperature. (Antec P18x-series have the air slightly pre-heated by one or two HDDs.)

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Old 09-29-2009, 12:16 AM   #4
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Quote:
Originally Posted by Olle P View Post
I agree that this doesn't seem to be the best PSU out there, and the thermal limitations are way too low.
It seems you are missing the point. PSU rated at 25C will work in a hotter environment but will not supply the rated power in a real working environment.

Quote:
Measured the power supply maximum wattage with an unrealistic room temperature, normally 25 C (77 F), while thetemperature inside the PC will always be higher than that at least 35 C (95 F). Semiconductors and inductors have a physical effect calling de-rating where they lose their ability to deliver current (and thus power) with temperature (see Figure 28). So a maximum power measured at a lower temperature may not be achieved when temperature is increased.
http://www.hardwaresecrets.com/article/181/8
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