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1TB is 240 bytes. It follows that a 40 bit address bus can address 1TB. Since 1TB is 1TB regardless of the system's word size, a 40 bit address bus can address 1TB on a computer with an 8 bit, a 16 bit, a 32 bit, or any other word size.

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Q: How many Terabytes of memory would a 40 bit address bus be able to address if the system word length was 8bits 16bits 32bits?
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