I have computer about 5 years old and have FreeBSD 11.1 on its 965 AMD 6 core with 16 GB ram. One thing that's slow is USB3. An other thing is SAS disk pair 500 GB. I added USB3 expansion card, but still seem to copy at only 19MB/s. Is it possible the motherboard just doesn't work with this expansion card? How do I figure that out? I can kind of visualize that I need two USB3 drives and to copy form one to other to really see the speed.