If you are experiencing problems [. Welland offers USB3.
0 ( SuperSpeed) operations to take place simultaneously, thus providing backward compatibility. The structural topology is the same, consisting of a tiered star topology with a root hub at level 0 and hubs at lower levels to provide bus connectivity to devices.I order 2 of USB 3. 0 pci card but it won' t work with my windows 7 64bit desktop.