Since: Dec 04, 2007
A quick look on tomshardware.com gave me this post:
There is no such cable. They are both two different technologies that do not appreciate interaction at a power level. The normal result is a smokey affair.
The post after that said that there supposedly is such a converter, but....I doubt it would work very well. Point is, the voltages and signal paths would just be too different. I'm sure some places TRY to make converters or adapters, but they just don't work well.