I think it totally depends on the controller and the firmware running on it and as DavidLE has also mentioned, it's unique to each controller type. So what works on an SMI controller might not work on a Micron controller, for example. Although Alexel provided a good lead on the Silicon Motion controllers, he did not care to mention which card he was testing with. Similarly, DavidLE hasn't mentioned which brand of cards and specific controllers did he succeed with. I've sent them both a PM for more details but they haven't responded yet. Unfortunately, there's no easy way (that I know of) to determine which cards employ which controller by just interacting with the card firmware. I hope you have better luck with the Chinese cards; please do let us know how it goes.