The DTX form factor was announced to be in development by AMD on January 10, 2007. It is for small form factor PCs (especially for HTPCs) with dimension of 200 mm by 244 mm,http://dailytech.com/article.aspx?newsid=5648 DailyTech report AMD stated that the DTX form factor is an open standard, and is backward compatible with ATX form factor cases.