Un giga = 1024 Mb.

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Roberto -  
teebo Posted messages 33570 Registration date   Status Modérateur Last intervention   -
Un giga = 1000 Mb.
Merci.

9 réponses

bleup Posted messages 700 Status Membre 158
 
Hi

I'm not a computer whiz, but I think I know that:

1024 bytes = 1 KB
1024 KB = 1 MB
1024 MB = 1 GB

or if you prefer, 1 GB = 1,073,741,824 bytes
1 MB = 1,048,576 bytes
1 KB = 1,024 bytes

That's it for your question. See you!
148
440LVB
 
And just to clarify, be careful with kb, Mb, etc. Because the English refer to bits for bits and bytes for bytes (so 1 byte = 8 bits).

One can get tricked, for example, regarding the capacity of a memory card; if the stated capacity is 512 mega bits, that only equals 64 MB.
31
fozzie
 
this remark seems much more judicious to me.
0
fozzie
 
mega = 1 million
giga = 1 billion
so giga = 1000 mega
24
Anonymous user
 
Hi

yes, indeed 1 GB != 1000 MB

actually, you multiply by 1024 each time, not by 1000.

1 GB = 1024 MB = 1024 * 1024 KB = 1024 * 1024 * 1024 bytes.

there you go
16
teebo Posted messages 33570 Registration date   Status Modérateur Last intervention   1 797
 
DON'T FEED THE TROLL!

A little reading for those who speak without knowing:

http://www.bipm.org/fr/si/ (International System)
http://physics.nist.gov/cuu/Units/binary.html (U.S. site for official measurement prefixes)
http://sebsauvage.net/comprendre/unites/ (explanation by sebsauvage)

--
It is only by not paying one's bills that one can
hope to live in the memory of the commercial classes.
16
440LVB
 
Just like 1KB is not 1000 bytes, 1GB is not 1000MB

1KB = 1024 bytes
1MB = 1024 KB = 1024^2 bytes
1GB = 1024 MB = 1024^3 bytes = much more than one billion bytes.

This explains why, for example, a CD with 710,000 KB has a size of less than 700 MB.

So why 1024? Because it is a power of 2, making it easily representable in binary (=> 2^10 or 10000000000 in base 2, unlike 1000 (01111100111 in base 2). Finally, from what I remember from my first classes on binary, maybe someone can explain it better than I can....
12
vieu bison boiteu Posted messages 44334 Registration date   Status Contributeur Last intervention   Ambassadeur 3 591
 
Hi Roberto,
still the same problem...
but 1000 MB does not equal 1 GB and vice versa
the answer has already been given, but what message????
see you later
--
no link on the web page in English
I'm already flying enough on my own
7
Anonymous user
 
lol I think we agree!
4
fozzie
 
I think the question was about an order of magnitude,
If it's to know the capacity of a hard drive, we don't care much about the decimal.
1000 is therefore just (approximately).
Computing: it's all about 0s and 1s, it's in base 2, 2 to the power of 10 (or 1024) is the closest value to 1000, so ...)
3