Just upgraded from a HT P4 3.0 Ghz on a Asus PGGD1 to a Core 2 duo E6400 on a MSI P965 Platinum, 2GB of DD2-800 (OCZ Gold). My LG drive is now barely functional, installs have taken a good 6x as long as they should. After digging around I've discovered it is running in PIO mode, I've tried setting to DMA with no success, uninstalling the Secondary IDE channel and then adding it again, updating the firmware to DL13, all and it still sits in PIO mode (with the transfer mode staying set to DMA if availiable). I've tried using my old IDE cables, it's master on its bus, all my HDD are running on 3 of the 7 SATA connections.
It's currently taking about 7 minutes to move a 400mb file off a CD-R, inserting the Oblivion DVD and it sits there spooling up and then abruptly stoping over and over for about 4 minutes before the autorun finally gets going.
I'm about ready to give up and pick up a LiteOn SH-16A7S (SATA).
The Secondary IDE channel driver is version 5.1.2600.2180
DVD driver is version 5.1.2535.0
Firmware is DL13
Only other thing I can think of is I have one device in device manager showing up as an error, under Other Devices\SM Bus Controller. Haven't found drivers for it, not really sure what it is.