https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Two-questions/m-p/943664#M14703 Recent versions of MKL include em64t support for Windows x64. lapack incorporates Fortran WRITEs, so it depends on the ifort run-time library. Those functions would not work with the Portland compiler library. The MKL and compiler must both be 64-bit, or both 32-bit. Either combination will run on 64-bit Windows. The full distribution of ifort 9.x includes both compilers, just as MKL does. ifort 8.1 has a separate em64t compiler, available only by download. <BR />Generally speaking, you would get similar performance from MKL on a dual core CPU to what you see on dual single core CPUs. Sat, 25 Feb 2006 05:34:11 GMT TimP 2006-02-25T05:34:11Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Two-questions/m-p/943663#M14702 <DIV></DIV> <DIV>1) Will these MKL and Lapack Libs work running Windows XP 64 bit OS and an intel (or portland group) fortran compiler?</DIV> <DIV></DIV> <DIV>2) Will this exploite the dual-core features of todays CPU's? How does this compare to multi threaded 2 cpu performance. </DIV> <DIV></DIV> <DIV>Thanks in advance</DIV> <DIV></DIV> <DIV>Jim</DIV> <DIV></DIV><P>Message Edited by jimfraser@adelphia.net on <SPAN class="date_text">02-24-2006</SPAN> <SPAN class="time_text">06:00 AM</SPAN></P> Fri, 24 Feb 2006 21:59:12 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Two-questions/m-p/943663#M14702 jimfraser 2006-02-24T21:59:12Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Two-questions/m-p/943664#M14703 Recent versions of MKL include em64t support for Windows x64. lapack incorporates Fortran WRITEs, so it depends on the ifort run-time library. Those functions would not work with the Portland compiler library. The MKL and compiler must both be 64-bit, or both 32-bit. Either combination will run on 64-bit Windows. The full distribution of ifort 9.x includes both compilers, just as MKL does. ifort 8.1 has a separate em64t compiler, available only by download. <BR />Generally speaking, you would get similar performance from MKL on a dual core CPU to what you see on dual single core CPUs. Sat, 25 Feb 2006 05:34:11 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Two-questions/m-p/943664#M14703 TimP 2006-02-25T05:34:11Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Two-questions/m-p/943665#M14704 <DIV>Thank you for that reply Tim, it will help me make a purchasing decsion.</DIV> <DIV></DIV> <DIV>Jim</DIV> Mon, 06 Mar 2006 01:31:40 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Two-questions/m-p/943665#M14704 jimfraser 2006-03-06T01:31:40Z