WTX

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WTX (for Workstation Technology Extended) is a motherboard form factor introduced by Intel in 1998, for its use at high-end, multiprocessor, multiple-hard-disks server and workstations.

This form factor is geared specifically towards the needs of high-end systems, and includes specifications for a WTX power supply unit (PSU).

The WTX specification was created to standardize a new motherboard and chassis form factor, fix the relative processor location, and allow for high volume airflow through a portion of the chassis where the processors are positioned. This allows for standard form factor motherboards and chassis to be used to integrate processors with more demanding thermal management requirements.

Bigger than ATX, maximum WTX motherboard size is 14"x16.75" (35.56 x 42.54 cm). This is intended to provide more room in order to accommodate higher numbers of integrated components.

WTX computer cases are backwards compatible with ATX motherboards (but not viceversa), and sometimes come equipped with ATX power supplies.