ATX
Variants

ATX

Section Title: Variants
Table Section Text: None

Name	Organization	Year	Dimensions	Slots	Remarks

ATX	Intel	1995	12 × 9.6 in (305 × 244 mm)	7	Original, successor to AT motherboard

SSI CEB	Server System Infrastructure Forum	12 × 10.5 in (305 × 267 mm)	Compact Electronics Bay

SSI MEB	Server System Infrastructure Forum	2011	16.2 × 13 in (411 × 330 mm)	Midrange Electronics Bay

SSI EEB	Server System Infrastructure Forum	12 × 13 in (305 × 330 mm)	Enterprise Electronics Bay

SSI TEB	Server System Infrastructure Forum	12 × 10.5 in (305 × 267 mm)	Thin Electronics Bay, for rack-mount, has board component height specification

microATX	Intel	1997	9.6 × 9.6 in (244 × 244 mm)	4	Can fit in to ATX, and EATX cases.

FlexATX	Intel	1997	9 × 7.5 in (229 × 191 mm)	3

Extended ATX (standard)	Supermicro/Asus	12 × 13 in (305 × 330 mm)	7	Screw holes not completely compatible with some ATX cases. Designed for dual CPUs, and quad double slot video cards.

Extended ATX (commonly)	12 × 10.1 in (305 × 257 mm), 12 × 10.4 in (305 × 264 mm), 12 × 10.5 in (305 × 267 mm) and 12 × 10.7 in (305 × 272 mm)	7	Screw holes not completely compatible with EEB

EE-ATX	Supermicro	13.68 × 13 in (347 × 330 mm)	Enhanced Extended ATX

Ultra ATX	Foxconn	2008	14.4 × 9.6 in (366 × 244 mm)	10	Intended for multiple double-slot video cards, and dual CPUs,

XL-ATX	EVGA	2009	13.5 × 10.3 in (343 × 262 mm)

XL-ATX	Gigabyte Corporation	2010	13.58 x 10.31 in (34.5 cm x 26.2 cm)	7

XL-ATX	Micro-Star International	2010	13.6 × 10.4 in (345 × 264 mm)	7

WTX	Intel	1998	14 × 16.75 in (356 × 425 mm).	Discontinued 2008

Mini-ITX	VIA Technologies	2001	6.7 x 6.7in (170 × 170 mm).	1	Aimed at home theatre or other fanless applications

Mini-DTX	AMD	2007	8 × 6.7in (203 × 170mm)	2	HP supported with Pavilion Slimline series using AMD CPUs.

BTX	Intel	2004	12.8 × 10.5 in (325 × 267 mm)	2	Canceled 2006. Also micro, nano, and pico variants. Not generally compatible with ATX mounting.

HPTX	EVGA Corporation	2010	13.6 × 15 in (345 × 381 mm)	7	Dual processors, 12 RAM slots

SWTX	Supermicro	2006	16.48 × 13 in (419 × 330 mm) and others	4	Quad processors, not compatible with ATX mounting

Sentence(s)

In 2009, EVGA released a 13.5 × 10.3 in (343 × 262 mm) "XL-ATX" motherboard.

final_sentence: In 2009, EVGA released a 13.5 × 10.3 in (343 × 262 mm) "XL-ATX" motherboard.