Specifications
4 GB RAM
3.2 GHz speed
Ethernet card: Net extreme Gigabit
Dell Express service code: 37484 56261
Service Tag: 1PZQFD1
800-BUY-DELL
800-289-3355
Problem Definition : " Amount of available memory limited to 256MB
Strike F1 key to continue, F2 to run the setup utility "
Solution : Actually it has 4GB RAM, but we can not see the full size of memory. So go to "BIOS setting and OS Install Mode -off"