Hi all, I need to bother again regarding now a DIMM configuration on my Xserve 3.0. I have bought this server with this DIMM configuration. it has 8 DIMM slot, and Im confused about the DIMM population rules. from left to right slot 8: empty slot 4: empty slot 7: 2GB slot 3: 512mb slot 6: 2GB slot 2: 1GB slot 5: 2GB slot 1: 1GB Im running 10.5. OSX server, and the OS is only showing me 6GB of RAM. Im not sure if all the DIMMs are OK, maybe some of them are faulty, but based on all the DIMM install on the server I should have 8.5GHZ but I think the order that DIMM are install is the issue. Not sure if the server needs the DIMMs to be in pairs. I think the 512MB may be causing the issue. When I go to "server monitor" its showing me only 4 DIMMs, 2x2GB & 2X1GB = 6GB. All the other 4 Slots are shown empty. I don´t want to start moving DIMMs around if I don´t know the populations rules. I was not able to find the correct service manual for this server. Any recommendation that can provide to me on this? I really appreciated any help. Luis.