On 28 July 2007, simon wrote:

I have recently installed centOS 5 on DELL pentium 2.7ghz (model optiplex GX270) and have 512 memory

Simon: Below is on the same box, after I did a clean install of CentOS 5.0. Still showing 512 MB of RAM, as it did with CentOS 4.4, which is what's installed in the box. Look at the information in the BIOS of that box and see what it shows you there. I'm using x86. Lanny

[mailing-lists@dell2400 ~]$ free total used free shared buffers cached Mem: 514084 507700 6384 0 11148 226780 -/+ buffers/cache: 269772 244312 Swap: 1044184 144 1044040 [mailing-lists@dell2400 ~]$ cat /proc/meminfo MemTotal: 514084 kB MemFree: 5704 kB Buffers: 11292 kB Cached: 226316 kB SwapCached: 0 kB Active: 281128 kB Inactive: 130944 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 514084 kB LowFree: 5704 kB SwapTotal: 1044184 kB SwapFree: 1044040 kB Dirty: 176 kB Writeback: 0 kB AnonPages: 174476 kB Mapped: 62020 kB Slab: 21928 kB PageTables: 4396 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 1301224 kB Committed_AS: 684364 kB VmallocTotal: 507896 kB VmallocUsed: 4748 kB VmallocChunk: 502772 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 Hugepagesize: 4096 kB [mailing-lists@dell2400 ~]$