I am running XP pro on an Abit AX3SP motherboard with a PIII 750 with 256mb of PC133 ram. Anyhow, I recently added another 128mb of PC133 ram to my system and everything was fine until I migrated everything over to a new case. Once I reinstalled everything in the new case the system wouldn't post. All the fans and drives whirred up but I would get no beep or video. After testing everything out I found that the RAM seemed to be the problem. I've found that if I startup my system with just the original 256mb stick of memory the system will start. I also found out that if I startup the system with the 128mb stick of memory it will also start. However, if I try to start the system with both sticks of memory in it will not give the beep and video. i've tried using the 3 different slots for memory and the same situation continues. Anyhow have any idea what the problem might be? It's really weird.