I've never heard of a SATA floppy drive. There's certainly no way to connect a conventional floppy drive with the 40-pin connector to a SATA port.
Floppies are slow no matter how they're connected because they physically spin at only 300 RPM (5 rotations per second). This gives them a data transfer rate of about 0.05 MByte/sec (actually 46,080 bytes/sec) for a standard 1.44MB disc. Even if you could come up with a way to connect the floppy drive to a SATA port, it wouldn't be any faster than one connected via USB.