Motherboard specification list

Sat, 18 Mar 2023 00:00:00 +0000

Classification

Specifications	Origin	Maximum size	Introduction

AT	IBM 1984	12 × 11"–13" 305 × 279–330 mm	Obsolete - See ISA. IBM created this specification in order to produce the IBM PC/AT, a machine using the Intel 80286. Also known as Full AT, it was popular in the Intel 80386 era and is now replaced by ATX
Baby-AT	?	8.5" × 10"–13" 216 mm × 254-330 mm	IBM launched in 1985 with the goal of replacing AT motherboards. It has the same functions as AT but smaller size, so it is very popular
ATX	Intel 1996 12" × 9.6" 305 mm × 244 mm	Published by Intel in 1995. As of 2014, it is still the most popular specification among DIY people
MicroATX	1996	9.6" × 9.6" 244 mm × 244 mm	Smaller version of ATX (25% shorter). It can be installed in most ATX chassis, but the number of expansion slots is less than that of ATX. It is also the most popular specification among DIY groups
Mini ATX	?	11.2" × 8.2" 284 mm × 208 mm
FlexATX	Intel 1999	9.0"
Mini-ITX	VIA Electronics 2001	6.7" × 6.7" 170 mm × 170 mm max.	Smaller and more integrated than MicroATX, mostly used in small devices, such as thin clients and digital video conversion boxes
Nano-ITX	VIA Electronics 2003	4.7" × 4.7" 120 mm × 120 mm
Pico-ITX	VIA Electronics 2007	100 mm × 72 mm max.
Mobile-ITX	VIA Electronics 2007	2.953" × 1.772" 75 mm × 45 mm
BTX	Intel 2004	12.8" × 10.5" 325 mm × 267 mm max.	A new specification introduced by Intel in the early 2000s, but was unsuccessful. Now only used for brand-name computers
MicroBTX	Intel 2004	10.4" × 10.5" 264 mm × 267 mm max.
PicoBTX	Intel 2004	8.0" × 10.5" 203 mm × 267 mm max.
DTX	AMD 2007	200 mm × 244 mm max.
Mini-DTX	AMD 2007	200 mm × 170 mm max.
ETX	Kontron	95 x 114 mm	For embedded systems and single board computers, baseboard required
Extended ATX	?	12" × 13" 305mm × 330 mm	For Rackmount server systems. Typically used on server-grade motherboards where dual processors and standard ATX are circuitously incompetent. The fixing screw positions in the upper part are the same as those of ATX
LPX
Mini-LPX	?	8"–9" × 10"–11" 203–229 mm × 254–279 mm	For lightweight computers
PC/104	PC/104 Consortium 1992	3.8" × 3.6"	For embedded systems
PC104plus	PC/104 Consortium 1997	3.8" × 3.6"	For embedded systems
NLX	Intel 1999	8"–9" × 10"-13.6" 203–229 mm × 254–345 mm	For low-profile computers, released in 1997. If you want to use an expansion slot, you must also add riser
WTX	Intel 1998	14" × 16.75" 355.6 mm × 425.4 mm	For high-end workstations and servers with multiple processors and multiple hard drives
XTX	2005	95 x 114 mm	for embedded systems
NUC	Intel 2012	100 mm × 100 mm	The ideal engine to power digital signage, multimedia kiosks, home theater systems and a variety of smart devices

Some comparison pictures

References

http://gigabytedailycht.blogspot.com/2013/07/blog-post_24.html https://zh.wikipedia.org/wiki/%E4%B8%BB%E6%A9%9F%E6%9D%BF%E8%A6%8F%E6%A0%BC%E6%AF%94%E8%BC%83 https://zhuanlan.zhihu.com/p/468200298

When choosing a case or designing a mounting plate, do not rely only on the board name. Check the actual width, depth, I/O shield position, expansion-slot alignment, and screw-hole positions. Some vendor boards are close to a common standard but still need custom standoffs or cable clearance.

ATX尺寸 on KnightLi Blog

Motherboard specification list

Classification

Some comparison pictures

References