Now I have two USB 3.0 PCBA, the PID of CYUSB3014 in Device manager of PC, one is 0x00BC, the other is 0x00F3. I used SDK v1.3.3, and the two board all can be recoginzed by PC. But when I load my firmware into RAM using control center, 0x00F3 board is ok but 0x00B board disappeared in device manager and control center. The two boards used different blcok 3014 chip, I want to know what cuased the difference. Note: the two board use the same schematic but not same layout, and the failed board has several other same baords has the same problem.