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Why, with a 32-bit adress bus , we can only have a maximum of 4 GB RAM memory?
rty640 said:4GB = 2^32 bytes.
64-bit can address 2^64 bytes.
The maximum RAM memory is limited to 4 GB with a 32-bit address bus because the 32-bit address bus can only address 4 GB of memory. This is because 2^32 (4 GB) is the highest number that can be represented with 32 bits.
No, it is not possible to use more than 4 GB of RAM with a 32-bit address bus. The addressable memory space is limited by the number of bits in the address bus, so a 32-bit address bus can only address up to 4 GB of memory.
Yes, upgrading to a 64-bit operating system can increase the maximum RAM memory limit. A 64-bit operating system can address a much larger amount of memory, up to 2^64 (16 exabytes) of memory.
The address bus is significant in determining the maximum RAM memory limit because it is responsible for addressing the memory locations in the computer's RAM. The number of bits in the address bus determines the maximum number of memory locations that can be addressed, and therefore the maximum amount of RAM that can be used.
There are some workarounds that may allow a computer with a 32-bit address bus to use more than 4 GB of RAM, such as physical address extension (PAE) or memory-mapped I/O (MMIO). However, these methods are not widely supported and may not provide the same performance as a 64-bit operating system. It is recommended to upgrade to a 64-bit operating system for better performance and to fully utilize available RAM memory.