utilizing

My old computer has Intel D845GVSR mobo. I wish to upgrade the ram from existing 512 MB to 1 GB. The product guide states that it supports DDR 333 up to 1.0 GB utilizing 256 Mb technology. How can I find whether I am purchasing the right kind of DDR 1 GB RAM? Thanks in advance.

Whenever i start the system..."Winhelp.exe" runs at the startup...And everytime i have to kill the process bec it is utilizing 50% of the cpu usage even though i dont feel any diff bec am using core 2 duo ,it is also utilizing my 50% of the net bandwidth...Is der anyway to stop the process from...