As above. Had an NF4 chipset board earlier, and the 212 never worked well on it.. in fact, only burnt coasters, even on good media.
Just changed to an Intel-platform system last month, Asus P5Q-E board, 4GB RAM, and a Q6600 CPU. Lo and behold.. smooth beautiful SATA burner goodness! The 212 is working just fine now.. wish nVidia could have implemented proper SATA burning support on their earlier chipsets!