I wonder if anyone has ever tried to mix nodes in a beowulf which use different types of RAM. We just bought some new AMD's with PC2100 and added them to a beowulf with SDRAM/PC133. The result is ackward, in the sense that the behaviour of the new nodes depends VERY MUCH on the settings I use for the DDR DIMMs. Any experience/clue ? Greetings, J. M. Pacheco