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It's supposed to look like a passive PFC choke. Real PFC chokes where common in the early-mid 2000. Replaced by active and lighter counterparts on more recent power supplies.

Worst passive PFC knock-off I heared about from my friends in China was that the customers associated heavy weight with PFC chokes so the manufacturers put a large stone in each non-PFC power supply and marked it with PFC. Then the customers complained that there was a rattle from the power supply to they "improved" quality by wrapping the stone in newspaper to cushion it.

More examples from the interwebz:

It's supposed to look like a passive PFC choke. Real PFC chokes were common in the early-mid 2000s. Those were replaced by active and lighter counterparts on more recent power supplies.

Worst passive PFC knock-off I heard about from my friends in China was that the customers associated heavy weight with PFC chokes, so the manufacturers put a large stone in each non-PFC power supply and marked it with PFC. Then the customers complained that there was a rattle from the power supply to they "improved" quality by wrapping the stone in newspaper to cushion it.

More examples from the interwebz:

It's supposed to look like a passive PFC choke. Real PFC chokes where common in the early-mid 2000. Replaced by active and lighter counterparts on more recent power supplies.

Worst passive PFC knock-off I heared about from my friends in China was that the customers associated heavy weight with PFC chokes so the manufacturers put a large stone in each non-PFC power supply and marked it with PFC. Then the customers complained that there was a rattle from the power supply to they "improved" quality by wrapping the stone in newspaper to cushion it.

It's supposed to look like a passive PFC choke. Real PFC chokes where common in the early-mid 2000. Replaced by active and lighter counterparts on more recent power supplies.

Worst passive PFC knock-off I heared about from my friends in China was that the customers associated heavy weight with PFC chokes so the manufacturers put a large stone in each non-PFC power supply and marked it with PFC. Then the customers complained that there was a rattle from the power supply to they "improved" quality by wrapping the stone in newspaper to cushion it.

More examples from the interwebz:

It's supposed to look like a passive PFC choke. Common in the early-mid 2000. Replaced by active and lighter counterparts on more recent power supplies.

It's supposed to look like a passive PFC choke. Real PFC chokes where common in the early-mid 2000. Replaced by active and lighter counterparts on more recent power supplies.

Worst passive PFC knock-off I heared about from my friends in China was that the customers associated heavy weight with PFC chokes so the manufacturers put a large stone in each non-PFC power supply and marked it with PFC. Then the customers complained that there was a rattle from the power supply to they "improved" quality by wrapping the stone in newspaper to cushion it.