i just installed 2 x 1GB DDR400 PC3200 RAM - which my system isn't recognizing at all (neither in BIOS nor in Windows)...I followed one of the other threads and it led me to the CPUID website and their CPUZ program and i was shocked then to see that CPUZ did recognise the new DIMMS and it was telling me i have 2.8GB memory (including the 768MB which windows recognizes.) I bought the RAM on ebay (so i don't know much about it, except that it should be DDR400 non-EEC unbuffered RAM, and thus should fit in my system.) i'm not sure if my sytem can handle high or low density ram and i'm not even sure which these new dimms are. I checked the crucial website and by all accounts this should be working, but its not! Any ideas why CPUZ can find it and nothing else can? i have an intel 828 chipset (i think) on an IBM A50 8084 running XP Pro. Any help would be much appreciated.