This is Rick with Dells online community team. While I would guess the drive would work with a processor lower than what Dell states are the minimum requirements, I can say that you might have some performance issue. Much like minimum specifications for video games, the specs that we state are ones that we feel comfortable stating will run smoothly. Often times these requirements leave some breathing room, and there is no way to be able to tell how well it will run without trying it. I am not certain what type of system you have, but Dell does have a 14 day return policy on spare parts. If you are skeptical about needing the t7600, you could purchase one to make certain for yourself. If you have other specifications exceeding what we have listed for minimum requirement to run BlueRay there is probably a greater chance of it working.
If you have any further questions just let me know.