You are very welcome. Better at your end being used than at mine in a box of spares.
As for the difference in speed between that and a USB device, it’s hardly surprising. The bandwidth over USB is limited, whereas bandwidth over PCI is much greater, and so I expect a PCI card to behave better.
Glad it sorted things out for you 🙂
Arch Linux, on a Ryzen 7 1800X, 32 GB, 5 (yes -5) HDs inc 5 SSDs, 4 RPi 3Bs + 1 RPi 4B - one as an NFS server with two more drives, PiHole (shut yours), Plex server, cloud server, and other random Pi stuff. Nice CoolerMaster case, 2 x NV GTX 1070 8GB, and a whopping 32" AOC 1440P monitor.