Windows is not a real-time OS. The CYL6602’s hardware buffering is critical. To avoid flicker:
Even with a "new" driver, problems can occur. Here are solutions to the top five issues. cyl6602 usbdmx512 driver windows 10 new
This method works when the dongle appears as "USB\VID_10C4&PID_EA60" (Silicon Labs CP210x clone) or "VID_1A86&PID_5523" (CH340 clone). Windows is not a real-time OS