Hi I wonder if you can help? I have a Dell Dimension 2400 and have tried to install a 1GB SDRAM PC2700 DIMM but the system will not boot. My friend also has a Dimension 2400 which is running a 1GB DIMM plus a 256MB DIMM with no problem. Why? PCBUILD's List Owners: Bob Wright<[log in to unmask]> Mark Rode<[log in to unmask]>