i recently tried to fit an intel x25-m ssd to my acer timeline x 5820t only to find it wouldnt go in far enough to properly connect due to a thick rubber pad stuck to the motherboard just below the sata connection so had to trim 3mm off the rubber with a stanley blade and i believe on some lenovo model laptops theres a little bit of plastic you have to remove when fitting some ssd drives
so its not 100% guaranteed even if the drive is the right thickness that it will just pop in
What an idea to cut off the rubber. Ghetto fix!
mcnumpty23, you might have got yourself the 9.5mm version of the x-25m and that will explain the 3mm you have to cut off.