I just bought a Dell PowerEdge 1800 computer and installed the Server 2003 SP1 software on it. I have a raid controller in it and have 2 Raid 1 arrays and a dynamic volume--making 5 HD in all. The computer is a duel core Intel Xeon CPU with 2.80 Ghz processor. I have 4G of ram installed. When I boot into Bios, I can see the 4 Gs of ram, but during POST it says I can only use 256MB of Ram. When I look at system properties after boot-up, it says I only have 256MB of Ram. Does anyone know how I can get my server to recognize all 4Gs? I want to solve this before I start to create my AD and do the other server thingys I want to do. Thank you.