Memory can be one of the most frustrating items to choose from. Usually you know from the start what the CPU and Motherboard will be but selecting the memory can be a real learning experience. There are several specs you need to consider but for the most part the clockspeed and CAS rating are the most important.
A quick patch update to Windows can extend the useful life of a PC. To take the fear out of Upgrading Windows 98 to Windows XP, rely on this guide. - PCSTATS Tips