Yamaha 4416 scsi on a Asus SC875 card.
Worst thing I ever got. Had the drive in for repair 3 times, they "upgraded" me to the 6416 the third time, but I still had problems. Coasters, random lockups of the drive, and slow writes when it did work,...
My system was not OC'd, and has the latest drivers too.
Went up 2 months ago to Best Buy and got a 179 dollar Acer 8*4*32 IDE drive, burned 36 disks so far without a coster at 8x. It's not the fastest out there by far, but it does have an 8 meg buffer! I'm happy now
M