Key Differences:
CF-52 MK1-2 are Intel Core 2 Duo processors.
CF-52 MK1-3 are Bluetooth 2.0 capable
CF-52 MK1-4 only have 4 usb 2.0, MK5 is the only one that has USB 3.0 ports
CF-52 MK4-5 support up to 16gb of memory
Differences between Panasonic Toughbook CF-52 MK Versions
