Bus Speed5 GT/s. Four (4) CPUs were chosen for the X220, the i5-2520M, i5-2540M, i7-2620M and the i7-2640M which is the one you are purchasing. You are getting the fastest CPU made for the X220! STORAGE: a 6Gb/s SATA III 4TB (4,000GB) blazing fast, large SSD for storage space for your music, movies, photos, videos and more!
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