I've read on here many times that the IDE bus and/or drivers can affect how well a PX712A writes disks. I didn't really give it much thought until I recently had to replace my motherboard. The old Abit KT7A (KT133A chipset) died, and was replaced with a Gigabyte 7VT880-L (KT880 chipset).
I've just burned my first DVD+R (a YUDEN000T01) using the new motherboard. Burned at 8x, a subsequent PI-PO scan shows error rates similar to burning the same media at 4x on the old ABit. When burned at 8x on the old ABit, the discs were still fine but there was a very noticable increase in error rates over 4x burns. So it would seem that this change in hardware and/or drivers does indeed affect write quality.
But it just doesn't make any sense to me. Given that the PX712A has its own internal buffer, it would seem logical to think that, provided the host IDE channel can keep that internal buffer filled (and the old Abit mobo was fine: there were no buffer underruns), what the PX712A then does with the data should be independent of the rest of the system. So can anyone explain why there is a difference?