The last digit of the value set in cpu_table ( for example 0x695) is the stepping value reported by cat /dev/cpuinfo. It refers to the release of the processor. It is adviseable to verify that the value corresponding to your cpu is set in cpu_table[]. I have several epia-m boxes some with stepping 1 and some with stepping 8. In this case, I set {X86_VENDOR_CENTAUR, 0x691 } in cpu_table[] to use the box with the cpu wich has stepping 1.
Regards