Sorry for the late reply...My motherboard is an ABIT KG7-RAID. So far I noticed that it is more likely that the drive may be a bit sensitive to heat....I noticed that once the machine starts to heat up, it starts refusing to write or detect the disc at all. I upgrade to firmware 1.0c last night and I did the same thing...I inserted the disc into the drive, suprisingly with the new firmware, it detects the disc. THen I started burning onto the disc, and guess what, Nero reports a power calibration error. So I shutdown my machine and re-started it after half an hour...and I burned without a single problem. Until it got too hot again and the power calibration error appeared again. My suspision is that the drive is sensitive to heat. I plan to get hold of a Panaflo fan and place it at the back of the drive to give it some air. Hopefully it will cool the drive down sufficiently.