Well not quite any but near as damn it - 99% at a guess. Not trying to be a smart alec, its just my experience - I had one drive ordered from my usual PC component supplier that did not work in my PS3. I thought it might have been a faulty unit but it tested just fine in a PC. I ordered exactly the same drive (same make and model number) from Amazon who actually advertised it as being PS3 compatible and it worked fine. All I can think is the drive from my PC supplier had a newer firmware revision or something along those lines that meant it would not work.