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The RAM is a very important component for the performance of the notebook, hence the choice of laptop is the ram memory RAM, Random Access Memory Cell, also known as direct memory access. A feature common to all types of RAM used for main memory is to lose its contents when power is lost.

They study other types of memory, based on other principles, which in future could help to overcome this limitazione.The processor loads from RAM when they are not present in its internal cache to execute the instructions and data to be processed and then rewrite again RAM. Since it is generally slower processor, its speed is a factor in the performance of the entire computer.

The DDR1 RAM in notebooks that are usually the ones to 333MHz. There are also 400MHz. DDR2 instead are usually found in laptops are at 533MHz, have latencies of more than DDR1
Recently, but still very rare, in conjunction with Intel Core Duo notebooks are equipped with DDR2 at 667MHz, but they are very high latency RAM.

In terms of performance because of the high-latency DDR2 RAM does not lead to increases in performance compared with DDR1, and indeed in many cases as the DDR1 400MHz DDR1 manage to be even superior in performance compared to the most 'recent recent DDR2 RAM .

DDR2 is still the best school systems implemented with Centrino processors, this platform is therefore advisable to choose those that have this RAM, even if the RAM in a notebook can be easily replaced, so it is possible to increase the capacity or the type of RAM Laptop at any time. The DDR2 memory working at voltages slightly below DDR1, which means a lower operating temperature of the same RAM and lower consumption. Basically the differences between the two RAMs are minimal, imperceptible during normal use of the laptop.

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