ATA/66 support is disabled by default.

If your device supports it, and you have a proper 80-conductor IDE ribbon cable, you can enable it by using Regedt32 to navigate to:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\\{4D36E96A-E325-11CE-BFC1-08002BE10318\}\0000

On the Edit menu, Add Value name EnableUDMA66, as a type REG_DWORD value. Set the data value to 1.

Shutdown and restart your computer.