286 processors to the P5 Pentium and a limited number of Pentium II systems. These motherboards have similar mounting hole positions and the same eight card slot locations as those with the AT form factor, but are wide and marginally shorter than full-size AT boards, with a maximum length of . However, Baby AT boards were mostly shorter than this, typically . The size and flexibility of this kind of motherboard were the key to success of this format. The development of bigger CPU coolers—and the fact that they blocked full-length PCI and ISA cards—spelled the end of Baby AT and was the main impetus for its successor ATX. While the AT standard is now considered to be mostly obsolete, some industrial computers still use it. In 1995, Intel introduced ATX, a form factor which gradually replaced older Baby AT motherboards. During the late 1990s, a great majority of boards were either Baby AT or ATX. Many motherboard manufacturers favored Baby AT over ATX as many computer cases and power supplies in the industry were still designed for AT boards and not ATX boards. Also, the lack of an eighth slot on ATX motherboards kept it from being used in some servers. Later Baby AT boards supported both AT and ATX power connectors in addition to ATX features such as standby power (allowing for a low voltage power switch, as well as Wake-on-LAN/Wake-on-Modem Ring) and USB by use of an ATX Form Card. After the industry shifted to ATX motherboard configurations, it became common to design cases and power supplies to support both Baby AT and ATX motherboards. Power connector The connector at the board is two Molex 15-48-0106 connectors. This mates with a Molex 90331. References External links PC Power Supply Links AT power supply connectors with pinouts PC Magazine At form factor Motherboard form factors