Crest factor (computer engineering)

in the computer engineering is the crest factor an indication concerning size and mounting options of a construction unit, which finds in a computer use. Different components can be simply joined and exchanged by this standardisation.

Crest factors describe for example printed circuit boards, drive assemblies and power packs. For PC MON ago boards (motherboards) for example dimensions, assembly heights of the electronic elements and mounting holes are specified.

motherboards

crest factor mm inch of remarks
RK 305 x 279-330 12 x 11-13
baby RKs 216 x 254-330 8,5 x 10-13
ATX 305 x 244 12 x 9,6 1996
mini ATX 284 x 208 11,2 x 8,2
E-ATX 330 x 305 13 x 12 ,200?
microATX 244 x 244 ,9,6 x 9,6 1996
Flex ATX 229 x 191 ,9,0 x 7,5 1999
VTX 325 x 267 12,8 x 10,5 Intel 2004
Micro VTX 264 x 267 10,4 x 10,5 Intel 2004
pico-VTX 203 x 267 8 x 10,5 Intel 2004
LPX 229 x 279-330 9 x 11-13 1996, Semipropietär
mini LPX 203-229 x 254-279 8-9 x 10-11
mini ITX 170 x 170 ,6,7 x 6,7 nano- ITX 120 x 120,4,7 x
4,7 via 2004 NLX 203-229 x 254-345 8-9 x
10-13,6 Intel 1999 XT 216 x 279 ,8,5 x
11 [work on] non removable disks crest factor size of
(tariff),

max

via 2003, 200 W , remarks
5.25 " full height of 5.75 x 8.00 x 3.25 early ones 1980er to in the middle of 1990er years
5.25 " half height of 5.75 x 8.00 x 1.63 early ones 1980er to early 1990er years
of 5.25 " Low profiles 5.75 x 8.00 x 1.00 early ones to late 1990er years
of 5.25 " Ultra Low profiles 5.75 x 8.00 x 0.75 (0,8) early ones to late 1990er years
3.5 " half height of 4.00 x 5.75 x of 1.63
3.5 " Low profiles 4.00 x 5.75 x 1.00 Desktops, most common design 2005
2.5 " 19 mm height of 2.75 x 3.94 x 0.75 laptops
2.5 " 17 mm height of 2.75 x 3.94 x 0.67 laptops
2.5 " 12.5 mm height of 2.75 x 3.94 x 0.49 laptops, Subnotebooks
2.5 " 9.5 mm height of 2.75 x 3.94 x 0.37 laptops, Subnotebooks
1.8 " 9,5 mm height of Subnotebooks, mp3-Player

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