I bought this cable to power an old Microsoft Sidewinder Precision Pro that I had.  I lost the Gameport to USB cable that came with the Joystick (it was one of the slightly later models that included both USB and gameport support).  The bad news is that it doesn't work out of the box.  The good news is that with a quick hack, it works fine now in Windows 10 64bit.  I took a queue from another reviewer and cut down a twist-tie, stripped the two ends, then wrapped the two ends around pins 2 and 7 on the Joystick gameport connector (leave the plastic sheathing on the twist-tie so it won't touch any of the other pins), and shoving it in to the case.  See the picture for more details on what I mean.  Unfortunately, I used a black twist-tie so it's not as easy to see.  Then, it was just a matter of plugging in this DB15-USB adapter, and voila, it now works just fine in Windows 10 64-bit.  The controller shows up as the right name "Microsoft Sidewinder Precision Pro (USB)" in the Devices and Printers menu, but the icon looks like an odd game controller.  Rest assured, though, that all of the axes work and buttons work as expected.