Then immediately following is a memory read/write failure and memory address failure, but I don't know if it's referring to the CPU cache or the DIMM. It says "Memorywrite/read failure at 0FF900000, read F916C716 expecting F916F916 Memory address line failure at 0FF900000, read F916F916 expecting 06060606".
Socket N is the same on both CPU processor chips, and BIOS is supposed to auto-recognize upgrade.
I suppose I could trade out the memory module and see if the problem goes away, but figured I'd check here as well. It's a 256 MB Infineon SDRAM chip that came with the Dell. Any insight appreciated.