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How Big is 64 Bit?

By kermit88 ·
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?

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by sgt_shultz In reply to How Big is 64 Bit?

that's a bigabyte, i think (rdl)

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by TheChas In reply to How Big is 64 Bit?

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

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by kermit88 In reply to

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

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by TheChas In reply to How Big is 64 Bit?

From the definition of SI prefixes at this site:

http://tinyurl.com/v2cp

Your memory field would be 18 Zetta bytes.

Chas

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by TheChas In reply to

The NIST page on Scientific Units also refers to 10^21 as Zetta
10^24 as Yotta

http://physics.nist.gov/cuu/Units/prefixes.html

Chas

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