Before buying a processor, you should always carefully study the offer. This will make it possible to make a comparison of processors in order to buy an excellent product and, preferably, inexpensively. Of course, if it is important for you to choose a processor that has an excellent combination of price / quality. In the following, it will be explained which points need attention and which are not.
First you need to decide what kind of performance you want from your computer. If you want a powerful computer, then you need a model of the latest generation or a little worse, but not by much. The best option is to install a core i7 processor. If a computer is needed only for simple work in the office, then a simple single-core processor will go.
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As described above, special attention should be paid to the cache volume of the maximum available level in the processor. In “Dual-Core” L2, the cache is only 1 MB (there are excellent models where the cache is 2 MB, but mostly 1 MB everywhere). Already in i3 and i5 the third level of cache is introduced. In the third "aik" he is from 3 to 4 MB. Here, “i5”, as a more serious model, has an L3 cache of 4 or 8 MB.