Form Factor

Typical Dimensions
(W x D x H, mm)

Usual Style(s)

Motherboard Connectors

Match to Case Form Factor

Match to Motherboard
Form Factor

PC/XT

222 x 142 x 120

Desktop

AT Style

PC/XT

PC/XT

AT

213 x 150 x 150

Desktop or Tower

AT Style

AT

AT, Baby AT

Baby AT

165 x 150 x 150

Desktop or Tower

AT Style

Baby AT, AT, AT/ATX Combo

AT, Baby AT, AT/ATX Combo

LPX

150 x 140 x 86

Desktop

AT Style

LPX, some Baby AT, AT/ATX Combo

LPX, AT, Baby AT, AT/ATX Combo

ATX/NLX

150 x 140 x 86

Desktop or Tower

ATX Style

ATX, Mini-ATX, Extended ATX,  NLX, microATX, AT/ATX Combo

ATX, Mini-ATX, Extended ATX, NLX, microATX, FlexATX

SFX

100 x 125 x 63.5 *

Desktop or Tower

ATX Style

microATX, FlexATX, ATX, Mini-ATX, NLX

microATX, FlexATX, ATX, Mini-ATX, NLX

WTX

150 x 230 x 86 (single fan)
224 x 230 x 86 (double fan)

Tower

WTX Style

WTX

WTX