Internal.. ok here is my results from testing..
I tried and tried to flash in a plextor px-116a firmware but couldn't get it to take it, so I gave up and instead flashed in a modded rpc-1 firmware 'just in case' because the previous one was rpc-2.
Infotool tells me the drive cannot support DVD+R discs but I've been burning them with booktype to dvd-rom so I give that a try.
Burst rate is 41 M/s, transfer rate is a smooth line all the way to 16x on a DATA disc.
So I try again with the pressed movie disc, burst rate is 14 M, and the line is suck like before.
What does this mean? The drive just can't go fast on dvd-video?