This articles lists tools that may help determine what your drive is capable of [URL] I don't think you can compare these slim DVD drives, like those used in laptops, to the old half-height DVD drives used in older desktops. According to the optical disc wiki, [URL] "Half-height optical drives operate upwards of twice the speeds as slim type optical drives, because speeds on slim type optical drives are constrained to the physical limitations of the drive motor's rotation speed  (around 5000rpm[6]) rather than the performance of the optical pickup system "
Has anyone with a BD drive in their 8940 tried ripping DVDs and observed the speed?  I'm wondering if the drive is just poor or if I have a bad one.When doing this for a DVD, it's about 1/3 the speed of the DVD drive in my 13 year old XPS 730x as well as another BD drive I put into that old XPS 730x.  I literally ripped 3 on my old PC in the time it took to do 1 on my shiny new XPS SE 8940. I'm thinking it's just that the slim drive might not be as stable for vibration and thus can't spin as fast, but I suppose it could also be a bad drive.  Because of the rounded bezel, I can't even put in an off-the-shelf drive to see if that works any better.
XPS 8940 SE, Blu-ray drive speed