So when it was installed in older machine I must have had that connected
to something(power supply?) or it would not have worked?
This is a Q&A page from ATI regarding this feature on their AIW and DV
cards. It would also apply to your Pinnacle card.
What use does the additional 4-pin internal power connector have on
the ALL-IN-WONDERŽ RADEONŽ 8500DV? How does it work?
A17: There is an internal 4-pin power connector on the ALL-IN-WONDERŽ
RADEONŽ 8500DV. This is an optional connection and is not required to be
connected for the IEEE 1394/FireWireŽ DV functionality to work. There are
very few devices that draw power from the IEEE 1394/FireWireŽ connector;
camcorders do not require this connection. However, some examples of devices
that do require this power connection are new 'eyeball' cameras that sit on
top of the monitor or some very small hard drives. When you connect the
4-pin power connector, power is provided on the IEEE 1394/FireWireŽ
connector's pins both on the graphics board and on the Input/Output block.
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