Units & Metrics

x86 Fundamental (Canonical) Data Types

Types (Standard & MMX™)
Bits
Bits Mag.
Byte(s)
Notes
Byte
8
23
1
Smallest type
Word
16
24
2
Half-precision
Double Words
32
25
4
Single-precision
Quad Words
64
26
8
Double-precision
Types (Extended)
Bits
Bits Mag.
Byte(s)
Notes
Double Quad Words / Octwords
128
27
16
SSE (xmm registers)
Double Octwords / Yetta Words
256
28
32
AVX/AVX2 (ymm regs)
Types (Others)
Bits
Bits Mag.
Byte(s)
Notes
Terra Words
80
-
10
FPU,Extended precision
Nibble
4
22
-
BCD. Non-canonical
Zeta Words
512
29
64
AVX512 (zmm registers)

 

Units & Metrics (bytes)*

Metrics (S.I)
Computing
Volumes(bytes)
Unit(1)
Volumes(bytes)
Unit(1)
103 (1000)
KB (Kilobytes)
210 (1024)
KiB (Kibibytes)
106 (1000000)
MB (Megabytes)
220 (1048576)
MiB (Mebibytes)
109
GB (Gigabytes)
230
GiB (Gibibytes)
1012
TB (Terabytes)
240
TiB (Tebibytes)
1015
PB (Petabytes)
250
PiB (Pebibytes)
1018
EB (Exabytes)
260
EiB (Exbibytes)
1021
ZB (Zettabytes)
270
ZiB (Zebibytes)
1024
YB (Yottabytes)
280
YiB (Yobibytes)

 

Units & Metrics (bits)*

Metrics (S.I)
Computing
Volumes(bits)
Unit(1)
Volumes(bits)
Unit(1)
103 (1000)
kbit (kilobits)
210 (1024)
Kibit (kibibits)
106 (1000000)
Mbit (megabits)
220 (1048576)
Mibit (mebibits)
109
Gbit (gigabits)
230
Gibit (gibibits)
1012
Tbit (terabits)
240
Tibit (tebibits)
1015
Pbit (petabits)
250
Pibit (pebibits)
1018
Ebit (exabits)
260
Eibit (exbibits)
1021
Zbit (zettabits)
270
Zibit (zebibits)
1024
Ybit (yottabits)
280
Yibit (yobibits)

*Source: ISO/IEC 80000


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