32-bit & 64-bit Operating System
Comparison 😈
| 32-bit | 64-bit |
|---|---|
| A 32-bit OS has 32-bit registers, and it can access 2^32 unique memory addresses. i.e., 4GB of RAM. | A 64-bit OS has 64-bit registers, and it can access 2^64 unique memory addresses. i.e., 17,179,869,184 GB of RAM. |
| 32-bit CPU architecture can process 32 bits of data & information. | 64-bit CPU architecture can process 64 bits of data & information. |
Advantages of 64-bit OS over 32-bit OS 🤩
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Addressable Memory: 32-bit CPU -> 2^32 memory addresses, 64-bit CPU -> 2^64 memory addresses.
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Resource usage: Installing more RAM on a system with a 32-bit OS doesn't impact performance. However, upgrade that system with excess RAM to the 64-bit version of Windows, and you'll notice a difference.
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Performance:
All calculations take place in the registers. When you’re performing math in your code, operands are loaded from memory into registers. So, having larger registers allow you to perform larger calculations at the same time.- 32-bit processor can execute 4 bytes of data in 1 instruction cycle while 64-bit means that processor can execute 8 bytes of data in 1 instruction cycle. (In 1 sec, there could be thousands to billions of instruction cycles depending upon a processor design, hence,
64-bit can process much more data in 1 sec than 32-bit.)
- 32-bit processor can execute 4 bytes of data in 1 instruction cycle while 64-bit means that processor can execute 8 bytes of data in 1 instruction cycle. (In 1 sec, there could be thousands to billions of instruction cycles depending upon a processor design, hence,
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Compatibility: 64-bit CPU can run both 32-bit and 64-bit OS. While 32-bit CPU can only run 32-bit OS. (All the starting bits will be 0 in 64-bit CPU while working with 32-bit OS.)
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Better Graphics performance: 8-bytes graphics calculations make graphics-intensive apps run faster.