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Different Speeds of Memory The faster the memory, the faster a computer operates. Memory comes rated at different speeds, and the faster the memory, the more it costs. Memory speed is measured in nanoseconds, and the lower the nanosecond rating, the faster the memory. For example, a 60 nanosecond chip is faster than an 80 nanosecond chip. Be sure that the memory you buy is as fast as the memory you''re replacing. Many newer, faster Pentiums come with RAM that can run at 100Mhz-the speed of the system bus. It’s always a good time to add random- access memory (RAM) to your computer. That’s because RAM is easy to install and can improve the performance of even the weakest computer. A couple of years ago, the average computer contained four megabytes (MB) of RAM. Now the standard is up to 16MB, with many new computers intellimouse explorer 3.0 sporting 24mb or more. and users who play computer games or work with desktop publishing programs might have as much as 128mb of ram.

what is sdram? sdram is an acronym for intellimouse synchronous dynamic random access memory. the term "synchronous" means that the clock cycle of the memory is exactly synchronized with the clock cycle of the bus. every calculation and operation a pc performs is timed according to a clock ticking millions of times each second, its clock cycle or megahertz rating. if the memory clock cycle is not in sync with the bus clock cycle, system problems will occur. what is cache memory? cache, pronounced "cash", is a high-speed memory designed to supply the processor with the most frequently requested data and instructions. the intellimouse information located in the cache memory can be accessed many times faster than information in the system''s main memory. the more information your system can retrieve from the cache memory, the more efficient intellimouse the system will run. level 1 (l1) cache, also referred to as primary cache, is normally located inside the cpu chip. level 2 (l2) cache, also referred to as secondary cache, was normally located on the system board near the cpu in the past. in today''s systems, both are physically located within the cpu and as a result are not upgradable.

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