I have a slightly strange problem with an Abit BD7II-RAID mobo. It has three memory slots and supports up to 2 GB RAM. I now has 1 GB RAM (2x512). When I add a third 512 module (to get 1.5 GB) the computer still reports only 1 GB total. If I swap all the memory around in all combinations I still get 1 GB total. What's going on? What am I missing? The memory is DDR2100 btw.