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 at 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 at 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 at dell2400 ~]$