Welcome We have cluster of 32 4Way nodes, build with Intel PIII Xeon 700 MHz w/1 MB L2 cache. Our problem is, ATLAS reports only 700 MFLOPS per CPU, which means he can't recognize SSE (during compilation phase, when he check for SSE/3DNow! he reports that none found). My question is: is there any way to force ATLAS to using SSE extensions ? TIA Sergiusz