Wikipedia
SWTX
SWTX (Server / Workstation Technology eXtended) is a computer case and motherboard form factor that is longer but narrower than WTX. SWTX is a proprietary format used by Supermicro, primarily for 4-socket servers. SWTX motherboards are not compatible with (E) ATX cases because of their size and mounting scheme. Likewise, ATX motherboards are not compatible with SWTX cases. Dimensions: from to . Most SWTX boards seem to be in the middle of this range, around .
Category:Motherboard form factors