When you first bought your PC, you probably didn't purchase a top-of-the-range computer as the difference between the price of the 2.0Ghz and 2.6Ghz model meant that you couldn't really justify the additional cost. Two years down the line, that 2.6Ghz chip will be based around old technology and PC suppliers will be almost giving the chips away. Now is the time to upgrade, but you need to make sure that you're selecting the right CPU.
CPU-Z 1.39 is a tool that will enable you to determine the type, manufacturer and speed of your CPU (and CPU chipset), thus enabling you to find out whether a CPU upgrade is available for your computer. It gives you information about the CPU cache and so much more, which might be relevant to the upgrade.
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