We burned some DVD+R DL and DVD-R DL discs with data content. For this task we used "Create Data Disc" from Nero CDSpeed in order to fully burn the discs.

MKM DVD+R DL 8X @ 8X

The drive started burning the media at 4.02X and maxed out at 8.05X with and average of 6.34X using ZCLV writing strategy. The burn time was 19.07mins.

Ricoh DVD+R DL 8X @ 8X

Unfortunately, the drive could not complete the create data disc function.

Verbatim DVD-R DL 4X @ 4X

The test started at 4.02X and writing speed maxed out at 4.03X with an average speed of 3.98X, completing the burn in 27:11mins.