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SkyHawk GM470 and GM570 Power Supplies Review

Cases & PSU/Power Supplies by KeithSuppe @ 2006-04-10

Today we have two interesting sub $100 power supplies from Skyhawk, rated at 470 and 570Watt, we put them through their paces on our SLI powered test system to see how they hold up.

Internal Circuitry

Popping Hoods

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The differences between the GM470PC and GM570PC are subtle but just recognizable. There's plenty of room under the hood, which did trouble me somewhat in a casing this size. Taking a closer look we find the secondary inductors differ on each unit. I've outlined these differences focusing on the output stage capacitance and inductor. Below the GM470PC has been outlined in green.

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Next we have the GM570PC it’s evident the secondary inductor on its output stage is somewhat larger. Below the capacitor arrangement and inductor have been outlined in orange.

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The GM470PC from a side view.

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The GM570PC from a side view

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Looking at the G470PC from the AC input stage (bottom right), the green and blue wires can be seen running from the AC-inlet on the opposite end (top right) over the heat spreaders to the thyristor and bridge rectifier stage. The rectifier seems to have a heatsink on it which may be indicative of a design compromise.

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As stated earlier the G570PC from the same angle shows the topology to be identical in both power supplies, with a slightly different parts spec. Note the rectifier (also heat-sinked) is much larger on the GM570 although capacitance remains equal.

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