I concur: on an eight node dual cluster 2 motherboard failures, no other problems.... Niels -- Dr Niels R. Walet http://www.phy.umist.ac.uk/Theory/people/walet.html Dept. of Physics, UMIST, P.O. Box 88, Manchester, M60 1QD, U.K. Phone: +44(0)161-2003693 Fax: +44(0)161-2004303 Niels.Walet@umist.ac.uk