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CPU - Upgrades: The best on the market processors at this time are dual core or quad core processors but soon will be available multi core processors is just matter of time.
Is a CPU upgrade necessary? To answer this question, you have to consider the tasks that you regularly perform on your computer. If your computer is at most a few years old and all you do is surf the web, check email, and write papers, then you probably do not need a new CPU. On the other hand, if you play the latest games, edit photos, or encode video, then a CPU upgrade may be appropriate. If your computer is feeling sluggish and you are thinking about a CPU upgrade, first check to see if the CPU is responsible. A good way to check your CPU usage in Windows XP and 2000 is to utilize the Task Manager. 
If your computer is at most a few years old and all you do is surf the web, check email, and write papers, then you probably do not need a new CPU. On the other hand, if you play the latest games, edit photos, or encode video, then a CPU upgrade may be appropriate. If your computer is feeling sluggish and you are thinking about a CPU upgrade, first check to see if the CPU is responsible. A good way to check your CPU usage in Windows XP and 2000 is to utilize the Task Manager. To access the Task Manager, hit Ctrl + Alt + Del and click on "Task Manager," and then select the Performance tab. Then, proceed with using your computer regularly, and check the "CPU Usage History" graph when you are done to see if your computing tasks are CPU intensive. You will know that they are if the majority of the graph is at or near 100%. If your computing tasks are CPU intensive, then a CPU upgrade will most likely improve the performance of your computer. There are a lot of different sockets for CPUs and you have to know which one will fit your motherboard if not you risk to get a processor which will be useless.
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