All I can say is: WTF?
This is a "good" batch; my Samsung can burn these at 18x, and everything can burn 'em at 16x.
But when I try to burn these at 8x on my 1655 (which produces the best quality results of all the burner/speed combos I've tried), I'll get a few that hit 8x and at few that peak at 4x.
What in the world is going on?
These are "good" in that they don't show the all-too-common error spike around the .7GB marker, so I'm at a loss as to why this is happening.
The error scan I did of one that only burned at 4x showed a massive PIF spike near the beginning of the disc that does not show on the discs at 8x.
BenQ 1655, BenQ 1620, LG 4167, Plex PX-716SA, Samsung SH-S162L, SH-S182M, Pioneer 111D, Lite-On SHM-165H6S and 1.9TB of HDDs to feed 'em and an X2/4800 to crunch for 'em.