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How Big is 64 Bit?

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by kermit88

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What is the term for how much space a 64 Bit Processor can address?

11 Bit = 1024K = Kilobyte
21 Bit = 1,048,576 = Megabyte
31 BIt = 1,073,741,824 = Gigabyte
40 Bit = 1,099,511,627,776 = Terrabyte
51 Bit = 1,125,899,906,842,620 = Petabytes
61 Bit = 1,152,921,504,606,850,000 = ??????

Max 64 Bit addressable space = 18,446,744,073,709,600,000

Any Help?

5 replies

by thechas

According to AMD's 64 bit documentation, the platform has been designed to address up to 4 Petabytes.

The present AMD 64 bit desktop CPUs are limited to either 4 or 16GB depending on how you interpret the specifications.

Remember, 64 bits is the width of the data buss, and does not mean that the address buss is the same width.

Chas

by kermit88

More informative that the other question, but I was looking for the name of what came after Petabype . (answer - EXABYTE)

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