ft991 and pc

dear om
Which cables do i need to connect FT991 and PC to use psk31
I know there drivers to download and settings to do
run HRD de luxe
or a serial cable both ends rs232
or a cable one end rs232 other usb
or a cable one end usb other round 6 pin
or do i need them all
thank you for advice and help
marcel on3bm