On Friday 25 August 2006 10:57, Thad Nielsen wrote: > Also, have you checked your BIOS: does it > see all the memory? And your motherboard is capable of all that RAM, > right? Thanks, but yes, all the memory is visible (I am back to the original 8 GB), and the motherboard will accommodate up to 32 GB. I am now switching RAM slots, before checking all the modules. The machine has a motherboard with 4 memory banks, and a CPU expansion board with another 4 banks, so swapping all the modules will require taking a few things apart. Peter -- Dr. Peter D. Roopnarine, Assoc. Curator Department of Invertebrate Zoology & Geology California Academy of Sciences 875 Howard St. San Francisco CA 94103 Phone: (415) 321-8271 FAX: (415) 321-8615 WWW: http://www.calacademy.org/research/izg/roopnarine/peter.htm "there's a mansion on the hill"