This document provides an overview of the WTX motherboards for personal computers.
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Saturday, October 19, 2013 6:14 PM
The WTX Motherboard Form Factor
WTX was a board and system form factor developed for the mid-range workstation market; however, most vendors making workstations and servers have used the ATX form factor. WTX went beyond ATX and defined the size and shape of the board and the interface between the board and chassis, as well as required chassis features.
WTX was released in September 1998 (1.0) and updated in February 1999 (1.1). Since then, however, WTX has been officially discontinued, and there will be no further updates.
This allowed 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 was 14″ × 16.75″ (356 mm × 425 mm). This was intended to provide more room in order to accommodate higher numbers of integrated components.
This form factor was geared specifically towards the needs of high-end systems, and included specifications for a WTX power supply unit (PSU) using two WTX-specific 24-pin and 22-pin Molex connectors. 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.