Could someone tell me if I can try a64 kernel on intel pentium dual core? Or it is only for AMD machines?
it wont hurt trying, the a64 kernel is tuned to take advantage of features unique to that processor.
Your computer may feel slow at worst and you may not see any difference at best if you use this kernel while not using AMD processor.
if you are curious, you may try all kernels and pick one that work best with what you have.