I beg your pardon for my bad English.
I have 2 drives Plextor Premium2 TLA TLA 0100 and 0110.
Both work fine in the "mode" gigarec. But mode A.M.Q.R.
write without increasing the radial size of the recorded information on the disk in comparison with the conventional recording at 4X (or any other). In these discs have PlexTools GigarecRate: Normal. I tried to check this with your Plextor 760. All the same-GigarecRate: Normal. Entries made by Yamaha CDRW F1 mode AMQR when checking in PlexTools have GigarecRate: 0,9.
I used firmware 1.0, 1.01, 1.02, 1.03. Plextools Pro 2.36, Plextools Pro LE 3.13, Plextools Pro XL 3.16.
Result all the same.
In the computer is the motherboard Gigabyte Ga-945GCMX-S2 (945g chipset + ICR7 mode IDE), the operating system WinXp Sp3.
It is a failure of two drives?
How can I check that AMQR Premium2 to operate correctly?