First Post! tl;dr Where do I find the revision letter on my mid 2009 logic board? I have this paranoia that this has been asked dozens and dozens of times but I'm having no luck searching. I've found a dozen semi related answers, but I can't piece them together... I have a mid 2009 macbook pro 5,4 and I want to install an SSD as my sole drive - probably a vertex 2 or agility 3 because of their prices. I'd love the silence of an SSD and the speed would be a great plus Am I going to be walking into a world of frustration? The one thing my mind is attached to is this talk about logic board revisions. I read, from my random googling, that the Revision B logic boards support SSDs a lot better than the Revision A boards do. How do I find out what revision my logic board is? I've posts talking about the Rev B vs Rev A but nothing about how to locate it... I took the under panel off when I upgraded the memory but saw no words on the logic board resembling "rev" or "revision". Should I even bother with an SSD if I have a Revision A logic board? I'm hoping the group of people who have trouble with Rev A boards are a lot smaller than the group who have been successful and haven't posted about it. Thanks for the help!