剛買的機子，有看支援列表，明明有說可以上16X
但是...

一、用Nero 6.3.1.20只能選到12X

二、進到DVD Identifier看
** INFO : An Empty Writable Disc Is Recommended For Accurate Results
** INFO : Drive = BENQ DVD DD DW1620 [FW B7P9]
** INFO : Write Capabilities = DVD+R DVD+R-DL DVD+RW DVD-R DVD-RW
** INFO : Disc = [DVD-R:MCC 02RG20 ]
** INFO : Write Speeds (Supported By This Drive On This Disc) Listed Below

** INFO : GET PERFORMANCE Write Speed Descriptor(s)
Descriptor #1 = 16620 KBPS (12.00x) - [CLV/Non-Pure CAV]
Descriptor #2 = 11080 KBPS ( 8.00x) - [CLV/Non-Pure CAV]
Descriptor #3 = 5540 KBPS ( 4.00x) - [CLV/Non-Pure CAV]
Descriptor #4 = 3324 KBPS ( 2.40x) - [CLV/Non-Pure CAV] - [Invalid Entry]
** WARNING : Drive May Have Returned Incorrect Descriptors

** INFO : MODE SENSE Write Speed Descriptor(s) [Legacy Command]
Descriptor #1 = 16620 KBPS (12.00x) - [CLV/Non-Pure CAV]
Descriptor #2 = 11080 KBPS ( 8.00x) - [CLV/Non-Pure CAV]
Descriptor #3 = 5540 KBPS ( 4.00x) - [CLV/Non-Pure CAV]
Descriptor #4 = 3324 KBPS ( 2.40x) - [CLV/Non-Pure CAV] - [Invalid Entry]
** WARNING : Drive May Have Returned Incorrect Descriptors

只有顯示到12X 請問到底是發生什麼問題不能16X

P.S 三菱8X-R面版 B7P9官方韌體