COMPUTER HARDWARE COMPONENTS FUNCTIONS
COMPUTER SYSTEM COMPONENTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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____ a large capacity that is slow for the CPU to access
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____ a large capacity that is quick for the CPU to access
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____ a small capacity that is quick for the CPU to access
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None of the above
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Detailed explanation-1: -Early PCs typically had from 16 KB to 128 KB of cache memory. With 486 processors, Intel added 8 KB of memory to the CPU as Level 1 (L1) memory. As much as 256 KB of external Level 2 (L2) cache memory was used in these systems. Pentium processors saw the external cache memory double again to 512 KB on the high end.
Detailed explanation-2: -The L2 cache size varies depending on the CPU, but its size is typically between 256KB to 32MB. Most modern CPUs will pack more than a 256KB L2 cache, and this size is now considered small. Furthermore, some of the most powerful modern CPUs have a larger L2 memory cache, vastly exceeding 8MB.
Detailed explanation-3: -Level 1 (L1) is the fastest type of cache memory since it is smallest in size and closest to the processor. Level 2 (L2) has a higher capacity but a slower speed and is situated on the processor chip. Level 3 (L3) cache memory has the largest capacity and is situated on the computer that uses the L2 cache.
Detailed explanation-4: -A direct-mapped cache memory of 1 MB has a block size of 256 bytes. The cache has an access time of 3 ns and a hit rate of 94%. During a cache miss, it takes 20 ns to bring the first word of a block from the main memory, while each subsequent word takes 5 ns.