I have benchmark my cluster with NPB2.3 Parallel code. My cluster is base on AMD K6 II machines. However, when I tried the code on Petium II machines with lower clock speed but it outperfrom the AMD machines. I was thinking is it because of the ALU of the AMD is not good as the Pentium. Can anyone justify this for me ? Thank you. from, POH CHEAN LENG clpoh at pl.jaring.,y