<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Hello Dear GMX Users,</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>I have installed Gromacs 4 on a Quad PC.</DIV>
<DIV> </DIV>
<DIV>However, when I RUN the example (Water), the CPU usage is just 25%. It means that just one of the four CPUs are used.</DIV>
<DIV> </DIV>
<DIV>Please help me how I can change the status of calculation for using all of the four CPUs.</DIV>
<DIV> </DIV>
<DIV>Thank you very much in advance.</DIV>
<DIV> </DIV>
<DIV>Mahmoud<</DIV></td></tr></table><br>