[sdiy] I can't decide....

[Colin f]

> isn't "jig-a-watts" just another pronounciation of "gig-a-watts"?

It isn't 'another' pronunciation, it's the correct pronunciation.
The prefix comes from gigas, the same root as the word giant comes from,
which isn't pronounced 'guy-ant' by anyone I know.
Just about everyone says giga wrong though, which means it has become the
de-facto pronuncation, and if you say it right, people will 'correct' you.
As this thread proves. ;-)

Colin f