I am really really new to Fortran. I am trying to find the best possible compiler for me and I am willing to pay for it. I am little confused about the terms INTEL is using such as AVX 256bit vectorization. First of all, let me ask if Intel's Fortran supports Quad precision ? I am working with matrices which are really ill-conditioned therefore the more decimals the better for me. Second what is this AVX doing is it a higher precision thing like Mathematica or Maple has?