Thank you for all your replies.
According to
adexelec.com, the PCI risers have what they called "small paddle board" that might be needed for some dedicated signals. That's what confuses me.
I know some manufacturers don't make riser cards w/ the paddle boards, and some do.
I have several small FlexATX computers and I will be using more than one of these cards in each: Ethernet, video, DVD decoders, TV tuner, WiFi, and SCSI. Do you think those need paddle boards?
Thanks.