wrote:

First confirm THEORETICALLY that plugging a 20-way connector & the
4 yellow-black connector is OK for a 24-way MOBO?

Yes, I'll trace the exploded elko, to see what rails it's across.

Thanks.

Yes, 20-way connector plus ATX 2x2 CPU power,
work fine on 24-way motherboard with ATX 2x2 CPU power input.

The pictures on the playtool site should show
such things being done. Either combo works.
20 in 24, or 24 in 20.

http://www.playtool.com/pages/psuconnectors/20in24.jpg

http://www.playtool.com/pages/psuconnectors/24in20.jpg

The second one doesn't always work out, because
sometimes there is a capacitor in the way, that bumps
against the right-hand end of the connector (the overhang).

Paul