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That url just gives me "Bad request."

It loaded for me, but here's a description for future readers.

The first image is the of the original IBM PC's power supply (or a clone) wherein there's a nice, clunky red switch directly on the power supply.

The second image is of a later AT style power supply where the switch was moved to the front of the chassis/facade. To facilitate this, it runs a pair of wires carrying mains power to the front of the case, which the switch (usually clunky, due to the current) physically toggles mains power into the motherboard.

IBM's own AT used the same style with the switch on the PSU itself (that image I posted is for one), and I have an unbranded AT clone (486 era) with the same style. That "AT with separate mains switch" style was probably an interim design that was used for tower cases before ATX showed up.

> That "AT with separate mains switch" style was probably an interim design

Almost all personal computers around 1996 were like this.

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