What profile of Blu-Ray are optical drives?

"Profile". Blu-ray is optical, it uses a different frequency of laser which enables more data.

Blu-Ray profiles are typically set to a "system" not the disc drive itself, as far as I know the drives themselves for the most part are the same. Here are profiles:

Profile 1.0: These are hard to run in to any more, they will support only the basic playback functions, and audio sound tracks. Even with this spec you can still play and listen to any Blu-Ray Disc. You can play the added features and such also, except Blu-Ray Live.

Profile 1.1: This is sometimes called "BonusView", it add the picture-in-picture function, so you can watch the movie and anything the disc thought you might like to see in a PiP box at the same time. Not the drive itself, but the "system" is required to have a second video and audio decoder to handle the PiP video and audio.

Profile 2.0: Often called Blu-Ray Live calls for 3 things, the requirements of Profile 1.0 & 1.1. Profile 2 players must have and Ethernet connection that allows not only downloading for firmware updates as some 1.1's have but also a miniumum of 1GB of local storage capibility so you can download and/or buffer content over the internet. Profile 2 have implemented the 1G RAM requirement a number of ways, built in RAM, SD cards, and/or a USB port.

Blu-Ray drives for computers are generally spec'ed by how fast they can read and write, the types of discs they read and write to, and access times. Given that most computers have 1G of RAM that can be added one way or another, it would then be up to the video card and software to determine what Blu-Ray profile they meet.