Hello, I've installed FC2 onto an HP Proliant 380G server which has 5GB of main memory. However, 'top' only shows 4GB being used/recognised. The bios detects all 5GB. I have tried adding 'mem=5G' and then 'mem=5120M' to the kernel command line but it still only sees 4GB. The kernel is the stock 2.6.5-1.358smp, and looking at the kernel configuration (make menuconfig) shows that support for up to 64GB has been built in (CONFIG_HIGHMEM64G=y). As such I would have though that seeing 5GB would not be a problem. Anyone any ideas about this? I'm currently (still) looking through google and the MARC archives to see if anyone else has this problem, but I cannot see anything. HP web site next I guess... Thanks, John. -- --------------------------------------------------------------- John Horne, University of Plymouth, UK Tel: +44 (0)1752 233914 E-mail: John.Horne@xxxxxxxxxxxxxx Fax: +44 (0)1752 233839