Looking to upgrade my computer Ram. I am running a system that is a few years old. My mother board is a Intel Corporation D845EPT2 with pentium 4 CPU 1.80 ghz. I have two slots for memory Max capacity is 3072 mb. Each module max is 1024 mb. I know it will only take ddr memory i wanted to add 512mb to what i already have which is. 512mb DDR (PC 3200) speed 200 mhz. I purchased 512mb ddr (PC2700) 333mhz/266mhz. But the system will not run it. I am asking if you could suggest a reason for this and maybe what i can do to add at least 1gb of ram. Thanks in advance