Why is cache faster than RAM and RAM faster than hard disk?

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Cache is faster than RAM because it is located closer to the CPU, allowing quicker access without the need for a bridge. RAM is faster than hard disks due to its direct connection to the CPU, while hard drives must communicate through slower interfaces like SATA or IDE. The hierarchical structure of memory storage explains these speed differences, with cache being the fastest, followed by RAM, and then hard disks. This design optimizes performance by ensuring the most frequently accessed data is readily available. Understanding these distinctions is crucial for improving computing efficiency.
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Why is cache faster than ram and ram faster than hard disk...?
 
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Cache has always been faster than ram because ram must access cpu through the bridge. Hardrive is even worse, it must pass through the sata or ide port to reach the cpu.
 
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