I installed a brand new ND-2510A in my system to test it before installing in a system I am building for a friend. I temporarily installed it in place of my Sony DRU-510A which works great. The NEC drive will not burn DVD's faster than 1.8X??? The drive is set for UDMA2. I have tried differnet media, media types and media speeds. I mainly use Memorex media which my Sony has no problems with. I also upgraded the firmware from 2.15 to 2.16. I tried burning some CD's. It burns CDRW's at 4X and CDR's at 18x max. Do I have a bad drive or am I missing something?